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ABOUT THIS MANUAL - Full Circle Automation

1. When dealing with distributed parameters the guiding prindple is to ensure a parameter s data is stored in only one place In the above example the actual data is stored only in the serial parameter function block The real setpoint sent to the rest of the system comes from there not from the potentiometer or the damp Note that in this example the clamp only affects the setpoint as adjusted by the operator at the operator station It does not limit the setpoint coming from the supervisor If that is required a second clamp would be placed on the immediate output of the parameter Both clamps are optional C 4 1 3 Ordinal Parameters Ordinals in SSD LINK are unsigned whole numbers and ordinal parameter function blocks are used solely to transfer them between bisynch and SSD LINK networks e g no scaling or translation is performed C 4 1 4 Logic Signals Using the bisynch protocol logics are transmitted as 16 wide bitfields using ordinal parameters The Logics Helper function block is used to split and combine the individual bits of the ordinal Refer to the Logics Helper data sheet for more information SSD LINK Overview Eurotherm Drives 89 As was the case with analog data care must be taken when the setting of logic signals is to be distributed This example shows logic output 1 being distributed between the supervisor and two separate momentary push buttons on an operator station Again the key is that the state of the bits
2. Repeater module CORRECT CABLE ROUTING as minimum radius Repeater module 3 3 3 Cable Damage If the fiber optic cable is damaged in any way transmission distance will be severely compromised Always ensure f The cable external sheath is completely undamaged f The cable is never subjected to tension or other mechanical forces Optical cable is not installed the same way as electrical wiring e g cable ties should not be used to secure cabling and installation personne must be properly trained in its use SSD LINK Overview Eurotherm Drives 13 If the cable is compressed e g by using cable ties or by walking on it it may be irreparably damaged Transmission distance will be impaired even though the cable appears externally undamaged 3 3 4 Composite Cable A composite fiber optic cable is available from Eurotherm Drives This consists of a single fiber with two electrical cables in a single sheath This provides a much stronger cable than the single fiber This cable should be used whenever damage to the fiber may occur This is espedally true where the cable runs between enclosures The two electrical cables can be used to power remote SSD LINK network repeater modules part 5206 2 00 3 3 5 Unused Fiber Optic Receivers If there are SSD LINK modules in which the secondary channa is not used the unused fiber optic receiver must be blocked using the block foam plugs provided with the modules or a spare fiber optic
3. 011 33 1 69 185000 Fax 011 33 1 69 185050 FRANCE continued Eurotherm Vitesse Variable SA 4 Avenue Albert Einstein ZA de Trappes Elancourt 78190 Trappes Tel 01 1 33 1 30503144 Fax 011 33 1 30661750 GERMANY Eurotherm Antriebstechnik GmbH Birkenweg 8 D 64665 Alsbach Hahnlein 1 Tel 011 49 6257 3005 Fax 011 49 6257 62094 Eurotherm Messdatentechnik GmbH Postfach 48 85568 Markt Schwaben Tel 011 49 8121 4100 Fax 011 49 8121 41020 Eurotherm Regler GmbH Ottostrasse 1 65549 Limburg a d Lahn 1 Tel 011 49 6431 2980 Fax 011 49 6431 298119 HONG KONG Eurotherm Ltd UnitD 18 F Gee Chang Hong Centre 65 Wong Chuk Hang Road Aberdeen Tel 011 852 8733826 Fax 01 1 852 8700148 IRELAND Eurotherm Ireland Ltd IDA Industrial Estate Monread Road Naas County Kildare Tel 011 353 45 79937 Fax 011 353 45 75123 ITALY Eurotherm Drives SpA Via Gran Sasso 9 20030 Lentate Sul Seveso Milano Tel 011 39 362 557308 Fax 011 39 362 557312 JAPAN Eurotherm K K Marushima Building 28 2 Chuo 1 Chome Nakano ku Tokyo 164 Tel 011 81 33 363 8324 Fax 011 81 33 363 8320 KOREA Eurotherm Korea Ltd Suite 903 Daejoo Building 132 19 Chungdam Dong Kangnam Ku Seoul 135 100 Tel 011 822 543 8507 Fax 011 822 545 9758 NETHERLANDS Eurotherm BV Johan Frisostraat 1 2382 HJ Zoeterwoude Tel 011 31 71 41 1 841 Fax 011 31 71 414 526 NEW ZEALAND Eurotherm Ltd 195 Khyber Pass Road Grafton Auck
4. System Control also performs some event filtering by considering certain locally detected transient errors to be warnings Only when such errors fail to dear in a reasonable time period does system control change the warning into a failure With its knowledge of network state the System Control function block handles the restart operation configured for each module in response to system wide errors and events Upon restart modules rerun their network checks as indicated by their health LED 8 2 DETECTING SSD LINK NETWORK PROBLEMS Failurein an SSD LINK system may be the result of either damage to or incorrect installation of the network These faults can frequently be attributed to physical damage to the fiber optic cable or improper transmitter launch power for the length of the fiber optic cable run see Section 3 3 1 The SSD LINK system is quite robust and often a marginal network can be tolerated for some time without causing noticeable performance degradation It is precisely because of this resistance to errors that special tools are required to ensure optimal performance during commissioning or service Such validation is wise to maximize the system s tolerance to future damage or component aging Cabling problems are most likely to occur with fiber optic cable connecting remote parts of an installation It is important to know the length of cable between each transmitter and receiver that length must be within the transmission range f
5. Tel 510 455 8058 Fax 510 455 4238 NEW JERSEY 1644 Washington Valley Road Martinsville New Jersey 08836 2005 Tel 908 271 1504 Fax 908 271 1053 USA REGIONAL OFFICES GEORGIA 3651 Canton Highway Suite 100 Marietta Georgia 30066 7603 Tel 404 924 1532 Fax 404 924 0296 NEW YORK 33 Highland Drive Marcellus New York 13108 1129 Tel 315 673 2557 Fax 315 673 2559 MARYLAND 849J Quince Boulevard Suite J Gaithersburg Maryland 20878 Tel 301 428 0435 Fax 301 353 0313 OHIO 2260 Jefferson Avenue Cincinnati Ohio 45212 3235 Tel 513 396 7603 Fax 513 396 7605 AMERICA Eurotherm Circuits Inc 4230 Lafayette Center Drive Chantilly Virginia 22021 Tel 703 968 4533 Fax 703 968 4538 Eurotherm Controls Inc 11485 Sunset Hills Road Reston Virginia 22090 Tel 703 471 4870 Fax 703 437 3182 Eurotherm Gauging Systems Inc 900 Middlesex Turnpike Building 6 Billerica Ma chusetts 01821 Tel 508 663 2300 Fax 508 663 0089 Eurotherm Recorders Inc One Pheasant Run Newtown Pennsylvania 18940 Tel 215 968 0660 Fax 215 968 0662 AUSTRALIA Eurotherm Pty Ltd Unit 3 6 18 Bridge Road Hornsby New South Wales 2077 Tel 011 61 2 477 7022 Fax 011 61 2 477 7756 AUSTRIA Eurotherm GmbH Geiereckstrasse 18 1 A1110 Vienna Tel 011 43 222 78 7601 Fax 011 43 222 78 7605 BELGIUM Eurotherm BV Herentalsebaan 71 75 B 2100 Deurne Antwerpen Tel 011 32 3 322 3870 Fax 01 1 32
6. 0 FPM non reversing All speed Inputs Outputs scaled at SSD LINK 8333 100 speed SSD LINK drive Speed setpoints and feedback values Speed Setpoint 83 333 8333 Pot Meter tine Speed Y 500 0 FPM eee SAM fC SAM reads these values as 100 speed Speed Feedback 8333 Display min 0 Display max 100 00 Format FPM The setpoint from the potentiometer function block is clamped at 83 333 full range This yields a motor speed of 100 Once again the feedback for the potentiometer function should be scaled to take into account the 83 333 full range operating point The actual machine number is displayed on the potentiometer e g 500F PM The Pot Meter scaling functionality will be described later The output of some application specific function blocks such as the Master Ramp is already scaled at 83 333 full range These are intended to be used as speed demand variables for drives SAM automatically displays these variables normalized to 100 6 2 4 5 SAM and SSD LINK Numbers When using SAM to access parameters in an SSD LINK system those parameters will be presented scaled to their full range value For most values 1 0 100 but for some parameters this may not be the case e g Drive Current 1 0 200 Drive Speed 1 0 120 etc 6 3 COMMUNICATION BETWEEN FUNCTION BLOCKS Function blocks are connected using ConfigE d to form the total module configuration Blocks in different m
7. 3 321 7363 CANADA Eurotherm Drives Inc 530 Seaman Street Unit No 3 Stoney Creek Ontario L8E 3X7 Tel 905 664 8911 Fax 905 664 5869 DENMARK Eurotherm Danmark A S Finsensvej 86 DK 2000 Frederiksberg Tel 01 1 45 31 871622 Fax 011 45 31 872124 THE WORLDWIDE EUROTHERM GROUP ENGLAND Eurotherm Controls Ltd Faraday Close Durrington Worthing West Sussex BN133PL Tel 011 44 903 268500 Fax 011 44 903 265982 Eurotherm Drives Ltd New Courtwick Lane Littlehampton West Sussex BNI77PD Tel 011 44 903 721311 Fax 011 44 903 723938 Eurotherm Gauging Systems Ltd Abex Road Newbury Berkshire RGI45EY Tel 011 44 635 521010 Fax 011 44 635 41873 Eurotherm p l c Leonardslee Lower Beeding Horsham West Sussex RH136PP Tel 011 44 403 891665 Fax 011 44 403 891689 Eurotherm Process Automation Ltd Southdownview Worthing West Sussex BN148NN Tel 011 44 903 205277 Fax 011 44 903 33902 Eurotherm Recorders Ltd Dominion Way Worthing West Sussex BN148QL Tel 011 44 903 205222 Fax 011 44 903 203767 FRANCE Eurotherm Automation SA Parc D Affaires Dardilly 6 Chemin des Joncs BP 55 69572 Dardilly CEDEX Tel 011 33 78 661943 Fax 011 33 78 352490 Eurotherm Measures SA 27 Avenue du Quebec ZA de Courtaboeuf BP 225 91942 Les Ulis CEDEX Tel 011 33 1 69 185100 Fax 011 33 1 69 185199 Eurotherm Systemes SA 27 Avenue du Quebec ZA de Courtaboeuf 91951 Les Ulis CEDEX Tel
8. Drives Incorporated 1808 Michael Faraday Court NK Reston Virginia 22090 U S A i Telephone 703 471 4565 MODEL ANALOG I O MODULE MODEL NO 15291 2 98 611 SERIAL NO 9611 US F 2068 GA350669 The complete product model number should be specified when ordering an SSD LINK module it follows the format L5XXX Y ZZ This number may be followed by an issue number which designates the manufacturing revision level e g ISSUE 2 for that type of module The model number consists of the following three parts f Product Number L5XXX Identifies the type of module e g L5207 processor f Network Option Y A single digit code specifying either just a primary 1 or both primary and secondary 2 fiber optic rings The default build standard is a module with both primary and secondary rings f Hardware Number ZZ A two digit code relating to any hardware builds included in the product e g 02 4 2 SSD LINK MODULE WIRING The diagram below illustrates the two different ways SSD LINK modules can be wired into a system The module on the left is isolated with respect to the system ground and OVDC references and the module on the right is non isolated Isolated modules are used when interfacing to signals which are referenced to a local common which is floating or at a 16 SSD LINK Overview Eurotherm Drives different potential than the OVDC reference Non isolated modules are used when interfacing to signals refere
9. However the second network can be powered down without affecting the main network 3 L3 Redundant Ring topology The simple networks described above have no fault tolerance If the network is broken or disconnected in some way most data transfer will cease This will usually cause the application controlled by SSD LINK to stop 10 SSD LINK Overview Eurotherm Drives The optional second network can be used to provide enhanced system security as shown in the following diagram LINK self heals Secondary within module channel Primary channel Operator station Broken Network X X Processor Processor LINK self heals within module The second network is inactive but checked when the primary network is healthy If a break occurs on the primary network the SSD LINK modules on either side of the break route the data via the secondary channel as shown This self healingy action recreates the continuous ring and allows data transfer to continue The redundant ring will also self heal if both networks are broken at the same place but the redundant ring topology will repair only a single network failure SSD LINK modules can be programmed to indicate partial or complete SSD LINK network failure e g to allow a controlled machine shutdown Examples of this are given later in this manual The network may also self heal if an SSD LINK module fails However since the module is typically an integral part of the system the appl
10. Print out the configuration drawings and place them together with the up to date hardware drawings in the enclosure SSD LINK Overview Eurotherm Drives 57 f Export the project in read only form tothe customer disk using Manager and placethe customer disk in a secure container mounted inside the enclosure before shipment of the system f Export the project in read only form to the backup disk using Manager and store the backup disk in a secure storage area If the testing computer was not connected to the Hub SSD LINK database add the following steps f Register the project with the Hub SSD LINK database and ensure all current configura tion files are present on the Hub SSD LINK database f If desired the project may be deleted from the testing computer using the Delete function within Manager 7 6 COMMISSIONING SSD LINK SYSTEMS This procedure describes how the SSD LINK project should be handled during the commissioning of SSD LINK systems It is assumed f The backup disk is available or if not a floppy disk is available formatted to 1 44MB for IBM PC and marked with the following information Work order number Customer name Customer site location ConfigEd project number and name f Thecurrent SSD LINK configuration block diagram drawings are available and the ConfigEd project number is shown both on them and on the ConfigE d scratch pad title block f The customer disk is available 7 6 2 Obtaining the Configu
11. The tapped arrangement is useful for larger systems e g those with multiple cabinets It is also useful if part of the SSD LINK network has to be disconnected from the main network or powered off ie RTNX Power ai A paia Processor Processor p PER channel MAIN NETWORK SECOND NETWORK Di a module Operator Station Operator Station Break must occur in this segment for main network to be maintained The above diagram shows the tapped network topology Data flows from the main network to the second network via the second set of fiber optic connectors or secondary channel connectors on the tapped module The tapped module is a standard SSD LINK module using both sets of fiber optic connectors All other SSD LINK modules on both networks use only the primary connectors If the second SSD LINK network is disconnected from the tap module either accidentally through a break in the fiber optic cable or on purpose by removing the fiber optic cable from the secondary channel terminals the main SSD LINK network is automatically maintained if the break occurs in the segment from the second network back to the tapped module The SSD LINK modules can be programmed to indicate when the second network has been disconnected which can be useful to allow different functionality when part of the system is disconnected or powered down Powering down the tapped module will break both networks as the tapped module is part of the main ring
12. This could damage the supplies and cause the SSD LINK system to shut down Some SSD LINK modules especially the L5102 operator station draw significant surge current on power up and power supplies must be chosen to tolerate this Power supplies with foldback current limits can be problematic unless carefully sized Use only wire designed approved and intended for use in power circuits when wiring from the 24VDC supply tothe SSD LINK modules Select power cable rated for the continuous load current required by the SSD LINK modules and use an appropriately sized fuse to protect the power supply and cables Do not use signal wire for this purpose as its undesirable high impedance which also results in power losses is a potential fire hazard in the case of overloads caused by an accidental short circuit or other fault In most cases the power common or OVDC signal common will be grounded at one placein a system However it may sometimes be necessary to provide a separate isolated power supply for a particular module This is the case for L5202 Digital O modules which use active low input channels An active low logic channel is energized when its input is pulled low An external wiring fault which causes an input wire to be accidentally connected to ground will look like a valid input if the power supply common or signal common lines are grounded If this input is a safety interlock or can cause machinery to go into motion such as a start
13. an SSD LINK digital I O module to the hard wired emergency stop system This configuration must be placed in a single digital I O module Other alarms MODULE Output System monitor channel Contact in series with emergency stop stop relay A Approved emergency P Indicate on network fail Indicate on module shutdown Disable Restart on network fail within Input system control function block channel To reset stop latches etc Emergency stop relay nie 26 SSD LINK Overview Eurotherm Drives A system monitor function block is used to indicate an SSD LINK network failure This will cause a digital output to trip the emergency stop relay as indicated The system monitor function block is configurable to allow detection of a number of SSD LINK network faults The default configuration is to detect SSD LINK network failures only Other alarms generated within SSD LINK can alsotrip the relay via the OR gate If the emergency stop is operated outside the SSD LINK network a contact is used to indicate this to the network as shown This could be used for example to reset any drive start latches within the configuration This is important to prevent the drives from re starting when the emergency stop system is reset In order for the configuration to work properly it is important that the digital module shown above is prevented from shutting down during SSD LINK network failure conditions This can be done by disabling theRestart O
14. comprising the SSD LINK system include f Drives connected directly to motors to control torque and speed f Operator stations presenting information to the operator and accepting commands from the operator f Analog I O modules interfacing with analog signals such as dancer potentiometers and E toP converters f Digital I O modules interfacing with digital signals such as push buttons lamps relays and PLCs 4 SSD LINK Overview Eurotherm Drives f Serial 1 0 modules interfacing with processor based equipment such as temperature controllers gauges PLCs and ticket printers f Interface cards used in supervisory computers f Gateway modules providing an interface to other factory networks f Repeater modules used to extend the physical size i e the distance covered by the fiber optic cable of the network f Software tools used to configure commission and monitor the SSD LINK system The software tools are designed to run on IBM PC compatible computers and indude Manager Setup And Monitor SAM and Configuration Editor ConfigEd Module configurations i e operating instructions programmed and installed by the user are composed of function blocks and other elements designated through the use of ConfigE d ConfigEd s graphical interface simplifies the design and implementation of module configurations It and the other software tools also allow the user to install monitor service modify and backup configurations throughou
15. configuration files have been modified using ConfigE d during the course of the day export the project in read only form to the backup floppy disk using Manager and store the backup disk in the allocated storage area 7 4 TESTING NOT CONNECTED TO HUB DATABASE This procedure describes how the configuration files should be handled during the testing of SSD LINK systems It is assumed the test computer 56 SSD LINK Overview Eurotherm Drives f Does not contain the Hub SSD LINK database and is not connected tothe computer that does f Contains the up to date SSD LINK database which is not a direct copy of the Hub SSD LINK database and SSD LINK tools If the Hub SSD LINK database is copied thereis a risk of future project configuration file corruption 7 4 1 Before Testing f Transfer the current configuration files from the Hub SSD LINK database to the test department computer this is best done by exporting the project in read write form from the Hub database f Obtain a copy of the current configuration block diagram drawings 7 4 2 Test Procedure f Power should be applied to the system using standard procedures f The module configuration files should be installed to the appropriate modules on the SSD LINK network f At least two free pages of module memory should remain when configuration files are installed f All modules should be checked to ensure satisfactory health status after all configura tions have been installed Suf
16. due to duplicate databases The same problem can occur if a user restores the SSD LINK database from a backup e g after some sort of disk failure If the whole database is restored induding all project directories all will be OK But if for example three projects were created since the last backup was made and these directories but not the id dat file are manually preserved future attempts to create projects will fail ConfigE d will try to create the first of those three project directories which already exists To prevent this backup and restore the file system regularly and as a whole unit never only parts thereof NOTE An on site service call may be necessary for Eurotherm Drives to repair severe database damage resulting from customer failure to adhere to proper handling guidelines In such cases of severe damage it may not be possible to recover the database A 4 DATABASE AND PROJECT MANAGEMENT Manager software is used to transfer information between a new or revised database either from a floppy disk or via modem and the configuration computer as well as for deleting and archiving projects These features ensure the user s database can be kept current and allow the user to manage projects and databases in an efficient and safe manner See the Manager manual for details on its database management functions A 5 PROJECT CONFIGURATION FILES When configurations are installed with ConfigEd a number of files are
17. for the configuration to work properly it is important that the above digital module is prevented from shutting down during SSD LINK network failure conditions This can be done by disabling Restart On Network Fail option in the system control function block in the module configuration file The alarm output from the handler is used to reset any latches within the SSD LINK system This is important to prevent the drives from restarting when the emergency stop system is reset The unacknowledged alarm output is used to trip the emergency stop relay and the display output is connected to a remote operator station legend to indicate the alarm In order to reset the alarms handler the operator station annundator must be pressed until all alarms have been acknowledged This dears the unacknowledged alarms output and allows the hardware emergency stop to be reset When the emergency stop is reset the alarms handler will be deared allowing the machine to start assuming all other alarms have been cleared Refer to the SSD LINK function block data sheets for more information on the alarms handler If the SSD LINK network is broken it is possible that the break is between the digital module shown above and the display operator station If this happens the reason for the alarm will not be shown since the operator station will shut down The following suggested L5102 operator station configuration indicates how this can be overcome OPERATOR STATION
18. free memory pool and the module will generate an L Error This problem is more likely to occur with the L5101 or L5102 operator stations due to the high display processing overhead in these modules Therefore operator station modules should be used primarily for O procedures with processing being moved to other modules If the module generates an L Error and the event queue has no memory available inspection of Get Info in SAM or ConfigEd will show Out of Heap SeetheSAM or ConfigEd manual for details on Get Info and its messages If the event queueruns out of memory the solution is to reduce the event frequency This can be done by increasing the timebase parameter of any timebase function blocks The sampler function block can also be used to reduce the event rate as can the ded mation filter If a module is close to maximum processing capacity and a computer is connected to its RTNX port the module may generate an L Error Connection of the computer is the equivalent of adding events to the queue which may be enough to cause a shortage of processing capacity If this occurs move the computer connection to another module 6 4 9 Events and System Synchronization Depending on the configuration some SSD LINK messages are sent only when a change of data occurs this is particularly true for logic messages It is therefore possible that data in a multi module SSD LINK system can become mismatched There are a number of way
19. initial system startup to measure the intensity of the light at the receiving module and the level adjusted at the sending module to ensure proper light intensity Eurotherm Drives recommends the purchase of a fiber optic light meter by all customers involved in the design of new SSD LINK systems one suitable light meter is the 3M Photodyne 18XTA Follow the meter s operating instructions carefully and refer to Eurotherm Drives guidelines part 4W351772 for appropriate methods of taking light level readings The T amp B plastic receivers have an ideal operating range of 20 to 31 5 dom 3 3 2 Routing and Terminating Correctly In order to achieve the specified transmission distance the fiber optic cable must be correctly terminated Termination is achieved through the use of special connectors which cut the cable when they are assembled It is vital the assembly instructions are followed dosely to achieve the specified transmission range If the fiber optic cables are routed incorrectly the transmission range will suffer Cable runs should be as straight as possible avoiding sharp bends The minimum bend radius for the single plastic fiber cable is 50mm 2 When fiber cables are terminated inside a housing the connection should be direct to the connector unnecessary bends and turns should be avoided F or examples of bend radius and routing within a housing see the diagram bel ow INCORRECT CABLE ROUTING Too sharp a bend in cable
20. is kept only in the parameter Its output goes directly tothe ordinal input of the Logics Helper function block whose logic outputs are the real logic signals used elsewhere in thesystem Serial Link Ordinal Parameter Soy bed Button Tele Logics Helper al Logic output 1 nput Bit 1 Input F nput Bi 2 Input T nput Bi nput Bit 4 y Logic output 2 nput Bit 5 nout Bit 6 nput Bit 7 nput Bit 12 nput Bit 13 nput Bit 14 nput Bit 15 nput Bit 16 Ordinal input Operator station module This example also demonstrates another important helper function block the button helper Its function is to send its logic output continuously based on the once per press message received from the button When neither button is pressed no output is generated or sent C 4 2 Event ault Logging and Diagnostics The L5203L can be configured as an output only data logger The data protocol is 9600N 81 ASCII CR LF text intended for capture by a serial printer or terminal emulator Printer or Computer with terminal emulator Operator station 90 SSD LINK Overview Eurotherm Drives TheL5203L Logger configuration will generate f Description of all detected network exceptions f Configurable message in response to an event f Configurable message in response to a logic edge or message f Configurable message in response to a value message f Configurable message in response to an ordinal message Description of detected network except
21. library is one of the factors which determines the final memory capacity available for general function blocks The following indicates the size of the I O libraries for the common SSD LINK systems modules f Processor module smallest library f Analog Digital I O average library f Operator station largest library SSD LINK Overview Eurotherm Drives 75 B 2 PATCH FILE This file is used to patch bugs and supply new features that have been added to the main control software in EPROM this avoids dismantling the SSD LINK module to change the ROM or having to swap out many modules EPROM Reduced EEPROM ROM code configuration space I O Handler Routines Execution transfer to and from patch file in EEPROM The patch file is contained in non volatile memory and is loaded automatically by ConfigE d during installation New versions of the patch file may be generated as new versions of the SSD LINK database become available As time passes after a main ROM release the patch file grows in size due to the updates and revisions added When a new ROM is issued the patch file fixes are transferred to the main ROM The patch file then shrinks back toa minimal size B 3 How MUCH CAN FIT IN EACH MODULE It is not easy to assess how many function blocks and connections will fit into a given module When a finished configuration is about to be installed to the target module it is compiled into a compact form It is only then that the
22. module Feedback Spindle B 6 5 INSTALLATION AND STARTUP After the SSD LINK system is designed the configuration files have to be loaded into the modules on the network through the use of ConfigE d Module configurations can be installed to all the modules on the network by connecting the computer to any one of them Each SSD LINK product has a serial number and a default configuration installed during manufacture f needed the serial number can be accessed through the Get I nfo command in ConfigEd or SAM In general identical modules will contain identical shipping configurations and addresses Despite the duplicate addresses the network will function on first power up unless there are physical problems Modules which do not enter their run state due to duplicate addresses will flash their health LED for more information on module health LE Ds see Section 8 3 1 Operational configurations and addresses must then be installed using ConfigE d this procedure is covered in detail in the ConfigEd user manual It is important to know the order and the addresses of the modules on the SSD LINK network to avoid installing configurations into the wrong modules In the diagram below the modules on the module list are displayed from top to bottom in the order of fiber optic 52 SSD LINK Overview Eurotherm Drives data flow The top entry in thelist is the module to which ConfigEd is connected The bottom entry is thelast module on the ne
23. movement of the machinein a highly defined manner satisfying the appropriate safety standards The following diagram shows a typical emergency stop relay design Emergency stop buttons Normally open b Reset button emergency stop relay contacts LL pproved emergency gi pi stop relay 24 SSD LINK Overview Eurotherm Drives The emergency stop relay should be of an approved design to ensurerdiable operation The emergency stop relay contacts are used to provide predictable machine operation when the buttons are operated 5 L2 TheSSD LINK L590 Drive The L590 drive has hard wired terminals for connection to the emergency stop relay as outlined above Two terminals are used which have the following function f Program Stop F orces the drive to ramp to zero speed at a pre defined rate and pre defined torque limit f Coast Stop Forces the main contactor of the drive to be opened There are no electronic switching devices in series with this terminal The coast stop terminal is connected directly tothe internal relay controlling the drive start contactor The armature current is quenched before the contactor opens The program stop and coast stop terminals are designed to stop the drive independently of the SSD LINK network The following diagram indicates how the two hardware terminals are used with the emergency stop relay outlined above Delay off contact 24V DC Approved emergency SSD LINK drive stop relay Program sto
24. plug Failure to block this receiver could cause spurious network failure due to ambient light entering the uncovered receiver These failures are extremely difficult to find 3 3 6 Repeaters Repeaters are provided to allow maximum transmission distance to be increased Each repeater is mounted in a heavy duty die cast box designed for under floor mounting It is powered from 24V DC and the composite cable is ideal for supplying the power Each repeater has two channels and switchable drive power see data sheet Often the transmission distance between endosure and desk is not known As a general rule therefore a repeater should be used at the exit and entry of the network to an enclosure or desk as shown below at terminal rail level Processor Operator station Enclosure External SSD LINK fiber cables Use of a repeater in this way creates a convenient fiber optic termination point to allow the external network to connect easily to the enclosures and desks 14 SSD LINK Overview Eurotherm Drives 3 3 7 Plastic and Glass Cable If the fiber optic cable run is greater than 60m 195 another option is to convert to glass cable This is done via a special L5206 repeater module part 5206 2 02 which serves to convert between the plastic cable and the glass cable On site termination of the present generation glass cable may be difficult since special tools are required to cut and terminate the cable correctly and safely A
25. to allow the database to grow due to f The addition of new and revised function blocks f Updating of the configuration tools f New and updated user configurations and projects A 2 SAM AND CONFIGED DATABASES SSD LINK databases are required for both SAM and ConfigEd The SAM database is somewhat smaller than the ConfigE d database since it is not possible to modify configurations with SAM some of the database information is not required A 3 THE 1D pDat FILE Every SSD LINK database has a unique identifier file known as the id dat file associated with it and located in the ssd_link database root directory The id dat file is used to allow the tools to identify the SSD LINK database When a project is generated within ConfigEd the id dat file allocates a new unique number to that project This number is used as the name of the directory which will contain the various SSD LINK module configuration files SSD_LINK ID DAT lt _____ __ D DAT created for 100 projects CLASSES Class Files not present in SAM only applications CONFIGS NEW Initial Configuration Files First project 12345678 lt __ ny mbercreated with Module 1 Configs thisID DAT number Module 2 Configs Module 3 Configs Module 4 Configs 12345679 Last project 12345777 lt _ whichcan be created withthis The diagram above shows the project directories within the SSD LINK database The direc
26. to determine their position on the display These function blocks allow the variable to be formatted correctly and displayed in engineering units Using ConfigEd the text on these function blocks can be changed to suit the application Text can be highlighted as well in a way similar to buttons and annunaators C 3 4 Potentiometers Potentiometer function blocks are used to raise and lower an SSD LINK variable Thereis a single output to change the connected variable and a single feedback input to display the variable The feedback variable must be connected for the display to change C 3 4 1 Basic Use of a Potentiometer Whenever a potentiometer function block is used it is recommended that its output be damped using the damp function block The damp allows the variable to be restricted to allow for over range as described in earlier sections SSD LINK Overview Eurotherm Drives 83 The following shows a potentiometer with a clamp function block on its output Setpoint Incremented output Potentiometer p Aa setpoint Input value to be changed It is important to note a potentiometer output does not store the variable to be changed The value to be changed is the input of the function block connected to the potentiometer output In this case the potentiometer output simply increments or decrements the input to the damp Messages from the potentiometer are sent only while the raise and lower arrows are pressed just
27. 207 processor module per L590 drive Add I O modules L5201 Analog L5202 Digital or L5209 Digital to suit I O requirements Add L5102 Operator Stations to suit operator I O requirements Add one repeater module per remote enclosure desk or machine location Add one repeater for each 50m 165 of fiber optic run Add specialized modules e g L5203 Serial I O L5210 PLC Gateway or L5211 VME Interface as required Add the engineering time The following diagram shows a typical custom configured system with the minimum number of modules specified using the above steps Processor Processor Analog I O Operator station Operator station Including one processor per drive allows standard processor module configurations to be used for each drive section of the system These standard configurations will cover all line section control and winding unwinding functionality This may seem to be a more costly approach but it has proved cost effective by reducing engineering time 5 3 OEM SYSTEMS One reason to allocate fewer modules is when there is considerable repeat order business for identical systems It might be worthwhile considering an SSD LINK system that is more value engineered with regard to hardware With such a system time is required to determine the minimum number of SSD LINK modules needed for the actual configuration SSD LINK Overview Eurotherm Drives 31 SECTION 6 CONFIGURING SSD LINK Each SSD LINK syst
28. ABOUT THIS MANUAL This manual presents a general overview of the SSD LINK product range Spedificinformation regarding the individual components of that system can be found in the appropriate data sheets and for thesoftwaretoodls their respective manuals When words are presented as either a software command to be typed or a menu command that text will bein a different typeface e g Get Infov WARNING Itis the responsibility of the user of these systems and software to understand thoroughly and check independently his or her work prior to operation of any SSD LINK equipment EUROTHERM DRIVES 9225 Forsyth Park Drive Charlotte North Carolina 28273 704 588 3246 Fax 704 588 4806 1994 Eurotherm Drives Inc No part of this manual may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or form by any means without the express written consent of Eurotherm Drives Inc SSD LINK is a trademark of Eurotherm Drives Inc All other trademarks are property of their respective owners Table of Contents Section 1 Introduction 1 1 Whatis SSD LINK ssessssssssessrsssrssrrrssrrrssrrrnsrrrssrnns 4 Section 2 Computer Tools 2 1 SSD LINK Configuration Tools s 6 Section 3 SSD LINK Network 3 1 Network TopdogiesS sssseeeseeerreeeeerrssrrrrrssrrrseen 9 3 2 Preferred Direction for the Fiber Optic Network 11 3 3 Constructing the Fiber Optic Network sesse 12 Se
29. K Overview Eurotherm Drives TheSSD LINK function blocks are found within theSSD LINK database This database must be present to configure SSD LINK systems Not all function blocks may be used in all module types this is especially true with SSD LINK drive modules Refer to specific SSD LINK product manuals for more details 6 1 CONFIGURING SSD LINK MODULES When engineering with SSD LINK a modulelevel rough sketch of what function will be where should be done before starting to load configurations from ConfigEd These providea ready visual indication as to the function of the SSD LINK configuration The goal is to assign functionality groups of function blocks to specific modules as accurately as possible before starting individual detailed configurations The following section gives general guidelines on how the SSD LINK modules should be configured into a working system 6 L1 Function Block Data Sheets Data sheets for the currently available function blocks within the database are induded with your purchase of SAM or ConfigEd and should be readily available to all design engineers The library is split into various categories to allow function blocks to be grouped either by similar functionality or application Those categories may change as the database is updated 6 1 2 Application Specific Function Blocks A number of application specific function blocks are available including f Master Ramp f Drive Section Control f Speed Program
30. K Overview Eurotherm Drives 93 APPENDIX D ROM ISSUES The firmware within an SSD LINK moduleis given a Module Type lD commonly referred to as the ROM number Standard system modules are either ROM 12 or 13 ROM 13 isthelater release and most SSD LINK modules usethis version The main differences between ROM 12 and ROM 13 are f ROM 13 modules process connections faster than ROM 12 modules f ROM 13 modules have approximately 10 more free configuration memory f ROM 13 uses an improved startup overridey system ROM 12 modules power up ina halted state if an active connection was sensed at the RTNX port f Timebase function blocks may be used in all ROM 13 modules while certain ROM 12 modules like the L5201 Analog cannot run them ConfigEd alerts users when attempt ing to install a configuration containing timebase function blocks into a ROM 12 module L5101 and L5102 operator stations are manufactured using ROM 12 D 1 BACKUP AND RESTORE The SSD LINK tools support a backup bku file which SAM can restore into a spare module to duplicate the original functionality and parameter settings This means f Customers do not have to stock spares with the same ROM issue as the modules in use as long as the spare module s ROM number is equal to or greater than the original module s the SAM restore function will work f Successive ROM issues offer new and better functionality For example ROM 13 pro vides improved performance in less spa
31. LINK Network Failed MODULE From Alarm Handler _INput slot display output Same legend number as Alarm Handler network fail within Alarms Handler acknowledge Ordinal Indicate on network fail a switch Indicate on module shutdown Network monitor Disable Restart on network fail True on within system control function block network failure The operator station legend is switched to indicate the SSD LINK network fail condition The switched legend number must be the same as the SSD LINK network fail legend number from the alarms handler Sincethe SSD LINK system is event driven it is possible to connect the input slot from the alarms handler and the SSD LINK fail switch together The last operation will take priority 28 SSD LINK Overview Eurotherm Drives 5 1 2 5 Forcing Drives to Run at a Slow Speed on SSD LINK Fail Certain applications require some drives within a system to run at a slow speed under SSD LINK network fail conditions Typical applications are extruder systems where mechanical damage could occur if the drive is stopped should a network fail happen The following diagram gives a suggested configuration Extruder start and run at slow speed Disable Restart on network fail within system control Configure to Digital I O Do Nothing on network fail Short fault free fiber The SSD LINK digital module shown should be mounted close to the extruder drive The length of fiber optic cable bet
32. Manager ConfigEd and SAM The following diagram shows a typical SSD LINK database directory structure SSD_LINK ID DAT CLASSES Class Files not present in SAM only applications CONFIGS NEW Initial Configuration Files 12345678 lt Project Directory L5101 10 L5207 11 12345679 retot_o Project Configuration Files INSTRS Instruction Files not present in SAM only applications LIBS 1 0 Library files LOGS Log files PLATS Target Platform files SYMBOLS Symbol files TOOLS WIN3 Manager SAM and ConfigEd This database must be available either on the local disk or accessed over a network to any computer used for configuring or maintaining SSD LINK systems It is installed automatically by Manager during the tools installation procedure WARNING Under no circumstances should any SSD LINK database be modified in DOS without consulting Eurotherm Drives The SSD LINK database directory structure is rigidly controlled and must not be altered at any time by the user The configuration tools expect to find files in specific places within the database structure The tools and utilities are designed to allow the database to be handled without resorting to manual intervention via the computer operating system commands SSD LINK Overview Eurotherm Drives 69 Thecurrent SSD LINK databaserequires approximately 10M B of space on the computer hard disk There must be sufficient additional space
33. The actual steady state draw on the output of Draw 1 is within the specified range but the draw may exceed this range occasionally This gives rise to considerable ripple on the actual draw feedback Filtering is required in this application in order to give an accurate steady state draw indication The position of the filter is important to prevent saturation of the intermediate value If the filter is positioned at the end of the function block chain as above the intermediate variable will saturate due to the ripple causing the filtered value to indicate an incorrect value lower than actual As shown in the diagram below the solution is to filter the raw draw before the multiplication Filter 100 To operator station Since the raw draw value is filtered before the multiplication the actual value to be sent to the operator station display will not saturate 6 2 44 Over Range and the SSD LINK DC Drive The SSD LINK DC drive has over range built into the speed demand inputs and outputs These 1 O are scaled f 100 speed SSD LINK variable 0 8333 f 100 speed SSD LINK variable 0 8333 f Conversely 1 0000 in SSD LINK 120 in the drive Internally the drive speed demand is clamped to a maximum of 105 This would relate to an SSD LINK variable of 875 The following diagram shows a drive with a speed setpoint supplied from a potentiometer function block 42 SSD LINK Overview Eurotherm Drives Full Range Line speed 500
34. URACY 100 FR 50 FR 25 FR 50 25 If possible the divide should always be performed before the multiply in order to maximize accuracy but only if the result of the divide cannot result in a value greater than 100 which would saturate to 100 and cause inaccurate results See Section 6 2 4 3 for more information 6 2 4 1 Over Range Allowance There is no over range built into the SSD LINK value number However some form of over range is needed to allow feedback control of a variable when it is operating at full range Therefore over range must be built into the number range when the system is configured For example in the L590 drive 100 current 0 50000 or 50 SSD LINK variable This means that under normal steady state conditions the maximum SSD LINK variable observed is 0 5 or 50 There is however an over range of 50 to currents up to 200 6 2 4 2 Closed Loop Control Over Range The following diagram shows a load cell tension control loop using a PID operating at 90 full scale set points The feedback is scaled to 9 0V full scale before entry into the analog input of an L5201 module 40 SSD LINK Overview Eurotherm Drives Scale analog signal to 9V FR Tension DERIVATIVE FR 50 0 Kgf FEEDBACK INTEGRAL ENABLE INTEGRAL NEG FB LIMIT 90 FR Winder drive Tension feedback Tension 90 FR setpoint Tension 100 100 15 3 Kgf 100 100 GAIN 556 CHANGING The PID operates with a setpoint
35. actual configuration can be assessed for size and the installation aborted if too large NOTE It is most important that some free space remains after the configuration file has been installed so the patch file will have room to grow The memory space is divided into pagesv in which each page represents 256 bytes ConfigE d indicates the number of free pages after the configuration has been installed tothe module It is highly recommended that at least two free pages of memory space be available after the configuration has been installed Otherwise there is a real risk that as the patch file grows the configuration will no longer fit into the module This is crucial for on site equipment requiring modification In that case if the configuration will not fit it will have to be re engineered 76 SSD LINK Overview Eurotherm Drives During installation ConfigE d indicates in thescratch pad window the number of free pages available If fewer than two free pages remain the configuration should be split up into more modules B 4 TEST POINTS Test points are used to allow easy access to certain parts of the configuration via SAM without the syM and cLS files Text associated with test points is stored in the configuration memory It is therefore important to minimize this text to allow maximum space for the configuration If the configuration is very short of space it would be permissible to allocate test points outside the two page limit I
36. and monitoring f Event fault logging and diagnostics C 4 1 Process Control and Monitoring For access to process variables the L5203 supports the Eurotherm BiSynch protocol in the following forms f Binary Master f Binary Slave f ASCII Slave When the L5203 is configured in bisynch slave mode it like all bisynch slaves is controlled by a single master device usually a Supervisory computer or PLC When the L5203 is configured in bisynch master mode it controls the bisynch network and commands all slaves For any given bisynch network there can be only one master device The primary difference between the ASCII and binary modes is that ASCII being a simpler protocol requires less complex drivers while the more complex binary protocol provides much higher throughput For detailed technical information on the bisynch protocol refer to the Eurotherm Drives document H P022047 F or guidelines in developing bisynch supervisory drivers to access the L5203 in slave mode refer to document package H R352424 Finally information on configuring the L5203 in El bisynch applications can be found in document HR351406 and in the SSD LINK function block data sheets C 4 L1 Communications Speed The El bisynch protocol transfers information at a relatively slow rate frequently 9600 bps yielding approximately one parameter every 20mS While the L5203 can communicate up to 57600 baud this speed must be downgraded to the highest common rate sup
37. and the feedback variable rovenmoneren AA D1 ID MODE o 100 100 METER MODE E Value 0 100 100 DIGITAL DISPLAY ANALOG DISPLAY Scaling of the PotM eter is performed in exactly the same way as the individual potentiometer and meter function blocks Both the potentiometer feedback and the meter feedback have to be connected to allow the function block to display correctly SSD LINK Overview Eurotherm Drives 87 C 3 4 7 Potentiometer and Meter Highlights The text within the potentiometer and meter function blocks can be highlighted in a way similar to buttons and annundators eg to indicate a particular potentiometer is active The highlight can be set to off on or blinking by sending ordinals to the highlight input C 4 L5203 SERIAL MODULE The L5203 is a multipurpose module which provides RS232 and RS422 serial communications between the SSD LINK network and third party equipment As the L5203 s serial ports are not electrically isolated from its power supply care must be taken to prevent ground loops when connecting to other non isolated ports One option is to power the L5203 from an isolated power supply Another solution would be use a serial line isolator One such device the D240 series from Eurotherm Process Automation provides a high degree of electrical isolation and offers a communications watchdog as well Two general applications to be discussed in the following sections are f Process control
38. are outputs on the right SSD LINK can be used to create complex sequencing and control systems It is good practice to annotate the function block diagrams with text and even drawings ConfigE d provides the tools needed to annotate these diagrams Annotation is especially important if the project is to be commissioned and serviced by a third party engineer Complex sequencing should always be annotated to indicate the significance of a particular logic state See the example below Annotation _ _ 100 Speed setpoint from pot It is highly recommended that you include a form with your configurations as shown in the following diagram SSD LINK Overview Eurotherm Drives 37 euRoTHERM prives fae zestoa usA e This allows important information such as the revision number to be present on the printed drawings making it easier to trace a project as part of a quality system Refer tothe ConfigEd manual for more information on forms SSD LINK function block diagrams contain outputs and inputs where signals are routed to and from other SSD LINK modules via the network The following diagram shows the SSD LINK input and output connectors Module address 5 Module address 10 SSD LINK Function Network Function block block Destination Destination Source module Local module address module slot address module slot Source and destination SSD LINK network connectors are shown At module address 5 data is being passe
39. arms Handler The annundator display is shown with an alarm present The alarm channels are designed to accept logic inputs and trigger the alarms handler The alarm channels are specified within the alarms handler There are three outputs from the alarm handler The display output is designed to connect directly to the operator station legend input When this output is active the appropriate legend appears and the highlight flashes See later sections for detail about the operator station legends and highlights The sender is necessary to prevent mismatch between logic states in different logic modules The two logic outputs allow alarms to perform various functions such as stopping the machine or sounding a horn C 3 L5102 OPERATOR STATION TheL5102 is a touch screen operator station designed for local control of a system The module can be used to display and set any type of SSD LINK variable f Logic via push buttons or highlights f Values via pots or meters f Ordinals via pots or meters These various display elements are function blocks loaded into the display handler within the operator station configuration The display handler specifies which function block appears in each of the six bands of the display C 3 1 Memory Limitations The L5102 can handle only a small number of SSD LINK function blocks due toits large SSD LINK Overview Eurotherm Drives 81 display library It is highly recommended that the L5102 module be u
40. awings As with most engineering activities the completeness and accuracy of the configuration drawings will aid smooth completion of the total project ConfigE d incorporates a simple CAD package where the function block diagram is actually drawn on the computer screen When completed configuration files are installed into the SSD LINK modules The screen drawings can also be printed as a part of the final system documentation ConfigE d therefore removes the manual documentation step in the design process dramatically reducing the chance of configuration errors due to mismatch between the block diagram documentation and the module configuration Refer to the user manual for more detail about designing configurations with ConfigE d The following diagram shows a module configuration block diagram This example is for a Tic Tac Toe display for an operator station which is a training exercise included in the ConfigE d package 36 SSD LINK Overview Eurotherm Drives E w x i LEGEND BT w Coe LEGEND System SYSTEM CONTROL Middle Bottom BUTTON BAND BUTTON BAND BUTTON BAND Ie TE 1 ML 4 BL 2 TM 2 MM 2 BM 3 TR 3 MR 3 BR 4 TT 4 MT 4 BT Various signal inputs and outputs on the block diagram are shown It is recommended that the general signal flow should be from left to right with the SSD LINK network inputs and hardware inputs on the left of the drawing and the SSD LINK network outputs and hardw
41. ber of drives the drive start logic can be implemented within the SSD LINK modules For OEM customers who are responsible for machine sequencing the application sequencing can be split into two areas f Drive sequencing implemented in the SSD LINK modules f Machine sequencing implemented in a PLC 46 2 PLC Gateway A more sophisticated approach to allow connection between PLCs and SSD LINK is touse the L5210 PLC gateway which allows complete information exchange between SSD LINK and the target PLC SSD LINK network L5210 PLC gateway 22 SSD LINK Overview Eurotherm Drives The above diagram shows the use of an L5210 PLC gateway containing software written to allow interface between the two networks This gateway allows full high speed data transfer between the SSD LINK system and the PLC no other I O is required Gateways are currently available for the following PLC networks f Allen Bradley Data Highway Plus f Siemens H T bus f Modicon Modbus Plus f VME f GE Fanuc 90 70 PLC Custom configurations can be developed in the same time frame as typical systems if required Contact Eurotherm Drives for more information SSD LINK Overview Eurotherm Drives 23 SECTION 5 PLANNING A SYSTEM Before an SSD LINK system can be configured the number of modules required to give the desired functionality must be determined Total system functionality can be split into three types f 1 0 interface f Drives f Signal
42. by 0 5 Similarly if a value has to be divided by 2 this has to be done by multiplying by 0 5 DIVIDE multiply by 2 MULTIPLY divide by 2 Input Output Input Input X Output Input 0 5 0 5 In general and henceforth in this manual values are represented by percentages F or example f 0 5 is represented by 50 f 0 83 is represented by 83 6 2 3 1 Values are Two s Complement SSD LINK uses 16 bit numbers internally to represent numbers Regarding values the 16 bit number is used to cover the full range of 1 to 1 The two s complement system is used to represent signed values f 1 32767 7F FF Hex f 0 0 f 1 32769 8001 Hex SSD LINK Overview Eurotherm Drives 39 The number 32768 8000H is currently an invalid valuewithin SSD LINK If this number is encountered as a value the SSD LINK module could generate an L Error This could happen if ordinal numbers are directly used as values If ordinal numbers must be used as values there areordinal to value conversion function blocks available for this purpose 6 2 4 Accuracy and Resolution with Values SSD LINK function blocks can be used to perform many signal processing functions In order to maintain good accuracy it is important to keep values as close to full scale as possible as a calculation proceeds The following diagram shows the correct way toimplement a multiply and divide function using discrete function blocks FR refers to full range BEST ACC
43. ce than ROM 12 SAM will prevent restoration of a ROM 13 backup file into a ROM 12 module 94 SSD LINK Overview Eurotherm Drives APPENDIX E GROUNDING ISSUES E l GROUND LOOPS A ground loop is caused by ground wiring which allows ground currents to flow by more than one path between two or more grounded points The result is drculating interference currents caused by magnetic pick up by the wiring loop These currents will induce noise voltages onto adjacent signal wires and result in signal degradation Power Supply Power Supply G G Location 1 Location 2 The diagram above shows a signal Vs generated at Location 1 transmitted through shielded cable and measured as Vm at Location 2 This drcuit should realize the function Vm K x Vs This situation is typical of a load cell or dancer position signal being generated at a machine and transmitted to a main equipment enclosure for processing Two ground paths exist in this situation one from the ground at Location 1 tothe transducer ground through the shield to the amplifier ground back to ground at Location 2 and a second from ground at Location 1 through the ground connection to Location 2 This second path is normally not shown in system electrical diagrams and can be easily overlooked The ground symbols used above imply this connection by showing that Locations 1 and 2 are tied to a common reference potential as shown in the following diagram SSD LINK Overview Eurotherm Drive
44. cessing capacity is not wasted when data is not changing and network traffic is reduced since messages are not sent if data variables are constant Many function blocks with multiple inputs will only generate an output when a specific input receives a message This input is referred to as the trigger input since sending a message to it triggers the generation of an output message see Section 6 4 2 There are certain specialized function blocks which send messages continuously at a given rate These are used when it is important to update the input of a function block continuously eg for feedback variables of closed loop control systems Two Eurotherm Drives computer software tools ConfigEd and SAM are used to respectively configure and commission SSD LINK systems To configure SSD LINK modules function blocks are placed into configurations in a CAD like environment on the computer running ConfigEd The blocks are then connected both to other function blocks in the same module and to other module configurations via the SSD LINK network Refer to the appropriate manuals for more information on these tools Function blocks both new and revised versions are generated by Eurotherm Drives Inc Each function block has a number within the RG35XXXxX series and is under Eurotherm Drives engineering revision control Refer to the F unction Block Data Sheets for information on the interconnect ability and use of the function blocks 32 SSD LIN
45. correctly terminated and installed glass fiber cable however will allow transmission distances in excess of 500m 1625 Eurotherm Drives can provide terminated lengths of glass cable or arrange for on site termination if required SSD LINK Overview Eurotherm Drives 15 SECTION 4 HARDWARE REQUIREMENTS The SSD LINK system must be installed and wired properly to get consistently safe and accurate operation of each module The guidelines that follow provide general information on power and signal wiring grounding and some specific wiring do s and don ts for particular SSD LINK modules 4 1 MODULE PRODUCT LABEL Each SSD LINK module carries a product label that identifies all SSD LINK system products except drives drives have their own product code format and should be ordered using that code In either case the full module name and model number must be completed to specify any SSD LINK module The module product label contains three pieces of information about the module the model name Analog I O Processor etc the model number L5201 2 02 L5207 2 00 etc and the serial number Modules already in the field may have the serial number typed on the product label current module product labels have a second label attached with the serial number represented by both a bar code and a row of numerals The following diagram shows a typical SSD LINK module label in this example the label is for an L5207 Processor module Eurotherm
46. ction 4 Hardware Requirements 4 1 Module Product Label escccisoisscacontsasncdinstomsiizaoiccadte 16 4 2 SSD LINK Module Wiring seeen 16 4 3 Cable Vatage Drop ss icsccacnsdensnncdniacccnetaeneibrtaeideneacanin 19 4 4 Signal Accuracy and Analog I O eesse 20 4 5 Usingan L5201 Analog Module for Digital Input 20 4 6 PLC and Supervisor Computer Interface 21 Section 5 Planning a System 5 1 Safety and SSD LINK Systems 24 5 2 Custom Systems isivsscesesceicavstecesavicareimntzansinssedset sence 30 5 3 OEM Systems sssssssessssirrirseertririrnrrnnnnrtnrnnnnnnnnrent 31 Section 6 Configuring SSD LINK 6 1 Configuring SSD LINK Modules sssini 33 6 2 SSD LINK Data Types acetesncatacniacicetniapiusantaniucaestens 39 6 3 Communication Between Function BIOcKS 4 43 6 4 Event PROCESSING saeissinteohivsatnasnineticwiabredantencievenecenene 44 6 5 Installation and Startup dtacchesenssesceciendetiierstaumacatince 52 Section 7 Configuration Procedures 7 1 Configuration Storage and Security cceceeees 54 7 2 Designing SSD LINK Systems 55 7 3 Testing Connected to Hub Database 0000 56 7 4 Testing Not Connected to Hub Database 56 7 5 Shipping Systems After Testing cccccccccsessssssseeeees 57 7 6 Commissioning SSD LINK Systems n s 58 7 7 Servicing SSD LINK Systems cccccecseeeeeseeeees 59 Section 8 Troubleshooting 8 1 Network Exceptions cccceeesssseeeessesseeeessssaeees 61 8 2 Se
47. d ConfigEd is however used to configure parameters and assign connections from the fixed block diagram to other SSD LINK modules If output connectors are assigned messages are sent at a regular rate This rate is set when the connectors are assigned 6 4 11 4 Application Specific Function Blocks In order to achieve the best performance from application specific function blocks e g the speed programmed winder SPW it is highly recommended that a processor module be allocated for each drive For optimum response the feedback variables should be provided from analog modules which do not contain any significant configuration If this is done execution times for the SSD LINK Overview Eurotherm Drives 51 closed loop winder function blocks will be on the order of 20mS The analog input sampletime determines the winder function block execution time and should be set to 25mS Toensure this performance from application spedfic function blocks those blocks should be placed in processor modules with no other continuously executing function blocks In the case shown below the tension feedback is via load cells which are amplified to produce a 9V full scale analog signal to the analog module inputs In this example 9V full range is used to allow the necessary closed loop feedback over range L5207 Processor Feedback L5201 Analog I O Rewind loadcell Spindle A Rewind loadcell L5207 Processor Minimal configuration in analog
48. d on its input This filter has a time constant which is dependent on the input sample time it is required that input messages are sent to the input at a regular rate The filter does not keep track of elapsed time The filter input should be supplied from a constant sampling source such as an analog input or a sampler The filter equation isk e Here Kis thefilter K value dt is the sample time and t is the time constant The following table shows typical values of K for a sample time of 100mS Time Constant K Value in seconds 0 820 0 900 SSD LINK Overview Eurotherm Drives 91 Use Wherea constant event rateis present and it is not required to se the time constant directly C 5 2 Filter This is the most complex filter and takes the most memory capacity E xcept for keeping track of time between input events it is exactly the same as the simple filter The filter time constant is a set up parameter Use Where memory requirements are not important and it is required to set the time constant directly Even though the filter does take account of time between trigger events triggering still should take place at reasonably regular intervals C 5 3 Decimation Filter This is an averaging filter The output is the arithmetic mean of a specified number of input events The output is updated when the specified number of input events has taken place This results in a reduced output event rate Use Where the input even
49. d loop trim f Master Ramp Implements an S Ramp function with start stop and status logic It is recommended these application specific function blocks be allocated to separate L 5207 processor modules to give the best performance and to reduce engineering time 6 L6 Network Addresses and Slots The SSD LINK system uses numeric addresses to allow data to be passed between modules on the network At configuration time in ConfigEd each hardware module is assigned an address from 1 3000 In addition each module can have up to 4095 SSD LINK input slots numbered from 1 4095 specified using ConfigE d A slot can be thought of as a software terminal configured within a hardware module This allows data to be sent to other modules on the network by specifying the address and slot number of the destination module that is to receive the data See the following diagram Module configuration SSD LINK network Slot 1 Slot 2 Slot 3 Address 1 4095 possible slots 3000 possible addresses Note that using small ordinals those from 0 to 255 for slot and module addresses will make configurations more compact and thus allow more functionality to fit in each module 6 1 6 1 Standard Addressing It is best to adopt a standard method of assigning addresses to the modules on your network This simplifies the task of grouping modules by function within your system and easily keeping track of them For example grouping of a drive and its assoda
50. d to module address 10 local slot 35 At module address 10 local slot 35 must be specified correctly The source module address is optional and is used to act as a cross reference for the source of the data ConfigE d can fill in the source module addresses automatically at print time and it is recommended this be done 38 SSD LINK Overview Eurotherm Drives 6 2 SSD LINK DATA TYPES Decimal numbers are used for all SSD LINK operations and the three main types of numbers within the system are ordinals logic and values 6 2 1 Ordinals Ordinals are whole unsigned integers used for counters and enumeration The ordinal number rangeis at least 0 65535 but may be larger for some module types refer to the module data sheets for details 6 2 2 Logic These are used for all logic operations The logic range is f 0 Logic 0 False f 1 Logic1 True Note Logic 0 Ordinal 0 and Logic 1 Ordinal 1 This equality between logic and ordinals is very important when configuring SSD LINK systems It is possible to connect logic gates which output logics to allow selection of operator station highlights which accept ordinals 6 2 3 Values These are used for all signal processing The SSD LINK number range for values is 1 00000 Here f 1 00000 100 000 f 1 00000 100 000 The number resolution at present is 0 00003 which is equivalent to 0 003 Since all values are normalized to unity to multiply a value by 2 you must divide it
51. dule active low It is common practice to ground the OV of electrical equipment With activelow devices such as the L5202 the input will be activated if a short occurs between an input cable and ground This could be a safety hazard if for example that particular input was used to start a drive It is highly recommended that active high digital modules such as the L5209 be used for digital inputs on safety critical applications If active low modules are used the supply should be isolated within the same system enclosure The OV terminal must not be connected to ground 5 13 1 Safety and Senders For safety critical areas of the configuration senders must be used to ensure SSD LINK network data reaches the destination module This is most important for logic data which in general is sent once upon change If for example a push button is pressed a single message may be sent over the SSD LINK network If this message is missed by the destination module the push button operation will be ignored Messages may also be missed due to partial failure of the SSD LINK network such as where damage to a fiber optic cable occurs See the function block data sheets for more information on senders 5 2 CUSTOM SYSTEMS The following table highlights the way in which the number of SSD LINK modules should be initially planned for custom SSD LINK systems 30 SSD LINK Overview Eurotherm Drives ACTION Specify number of drives Allow one L5
52. dule memory space If in doubt test questionable configurations to ensure there are at least two free pages by installing to the target module Use ConfigE d or SAM to change set up parameters within the function blocks 7 3 TESTING CONNECTED TO HUB DATABASE This procedure describes how the configurations should be handled during the testing of SSD LINK systems It is assumed the test computer contains the SSD LINK database or is networked to the one that does and is capable of running the SSD LINK software tools 7 3 1 Test Procedure f Power should be applied to the system using standard procedures f The module configurations should be installed to the appropriate modules on the SSD LINK network f At least two free pages of module memory should remain when configurations are installed f All modules should be checked to ensure satisfactory health status after all configura tions have been installed Sufficient tests should be applied to the system to ensure the functionality matches that of the system specification where necessary the configuration files should be modified SAM may be used to aid testing of the system 7 3 2 Backing Up and Updating f If SAM has been used to make permanent modifications to SSD LINK module configura tions use the Update command within ConfigEd to update all the affected configura tions Check the scratch pad to ensure no errors have been generated during the project update procedure f If the
53. dule to start check all modules in any of the other halted states for their health status f Health status H error f High level error reinstall configuration check data from Get I nfo for major function block s f Health status L error f Low level error review configuration perform Get Info using tools Cycle power or restart as a temporary work around see Section 8 3 3 8 3 3 L Error Failures Mistakes in configurations somewhere in the system are the most common causes for L error messages though the state is an all encompassing runtime error The first step is to perform a Get Info on the problem module in either SAM or ConfigEd The processor s stack will be displayed for the module in question 8 3 3 1 Module Overload If the Get Info stack trace mentions any error related to Out of Heap then the module s processing ability not related to the size of the configuration is probably being exceeded 66 SSD LINK Overview Eurotherm Drives The solution to this problem is to examine the configuration and consider what system events precipitated the overload Examine related trigger inputs and signal paths and any arrangement or setting that causes an excess of messages to overwhelm the module The reason could be as simple as trying to display six values at 30ms each or as complex as a distributed signal loop causing messages to cascade out of control Consider resetting input rates to a lower rate wherever possible to lowe
54. ectory CONFIG 005 j These files Files must match generated NFIG SYM actual module by ConfigEd PONIGA configuration for on installation SAM to operate CONFIG CLS without test points It is possible for the configuration files to become mismatched if correct handling procedures are not strictly obeyed The following section suggests maintenance procedures for the configuration files so mismatches do not occur A 5 2 Updating the Configuration Files SAM is used to modify parameters within SSD LINK modules These modifications are not automatically made in the original configuration If that configuration file is again installed into the module using ConfigE d the changes made in SAM will be lost see the illustration on the following page 72 SSD LINK Overview Eurotherm Drives Changes parameters within SSD LINK module SSD LINK module Installation Lae overwrites changes ConfigEd made by SAM This situation is resolved by using the ConfigEd Update command once work with SAM has been completed This extracts the modified parameters from the SSD LINK module and updates the configuration file in the ConfigEd database so the configuration will contain the new settings a Changes parameters within SSD LINK module SSD LINK module ConfigEd Update en ConfigEd installation retains ConfigEd ya SAM changes Refer to the ConfigEd manual for more information on the Update command A 5 3 Upgrading the Pro
55. em consists of modules connected by a high speed fiber optic network The SSD LINK system functionality is in general determined by function blocks contained within the module configurations An SSD LINK function block is a highly defined software object with the following properties f Data inputs f Data outputs f State data f Behavior functions as designed by the system engineer Each of these properties is defined in the applicable function block data sheet Function blocks may be combined in a configuration up to the limit of the target module s memory capacity In general SSD LINK function blocks execute only when messages are sent to their inputs When a message is sent this activity is known as an event Since actions take place only when events occur the SSD LINK system is said to be event driven When an SSD LINK function block is executed output results are generated and passed to other connected function blocks The connection may be local or over the SSD LINK network When one function block sends data to another a messageis sent which may invoke execution of the receiving function block whether it does or not depends on the characteristics of the input to which it is sent It is common for many function blocks to send messages only when there is a physical action on the configurable inputs e g pressing a push button or changing a setpoint value from an operator station potentiometer The advantage is that pro
56. eption Logger is the best tool to usein detecting network warnings 8 2 4 1 L5203 Printer Connections The L5203L configuration is preset to use the RS232 port B transmit terminals at 9600 baud 1 stop no parity These settings may be configured by the user however Connect the RS232 receive line of the printer pin 3 to the port B transmit terminal terminal 9 of the L5203L and signal ground pin 7 of the printer to signal ground terminal 11 of the L5203L NOTE Some serial devices reverse their transmit and receive lines If nothing is received after hooking up the printer try pin 2 of the printer instead of pin 3 8 3 DETECTING MODULE FAILURES Module failures or errors may be diagnosed using the module s health LED or by using SAM or ConfigE d 8 3 1 Health LED One way to check for module error is to examine the module s health LED which produces a steady or blinking code as detailed on the following page 64 SSD LINK Overview Eurotherm Drives DoS Ef Continuous off indicates the module has no power or has experienced a serious hardware failure Continuous on indicates the module is running Ee ee es a M 1 2 second rapid blinking followed by 1 2 second off indicates the module is ready to start but is unable to send a message to itself around the ring to verify the ring is complete Check for unconnected modules loose connections and unpowered modules LCE E E E E E E E E 1 2 second rapid blin
57. equired SSD LINK Hub Database Regular amp proper Company Headquarters off site backups Once the configurations for a system are completed they are registered with the parent Hub database see Appendix A for details which retains the files for security The configuration files should also be backed up on a floppy disk on site and left inside the appropriate system enclosure for easy access in case of equipment failure The procedures may appear complex but the primary objective is to ensure the configurations in the SSD LINK system modules the company H ub database and the customer s SAM computer match exactly This is critical since the configuration information is not stored solely inside the actual modules some is stored on the configuration computer 54 SSD LINK Overview Eurotherm Drives A secondary objective is to ensure sufficient backups are kept of the actual configurations so the current configurations will not be lost should any computers or other equipment fail It is assumed the Hub SSD LI NK database contains the latest version of the configurations when work on the project is complete Manager is used toimport and export projects and databases and may also be used to delete copies of the configurations from other computers such as a field person s laptop machine to conserve hard disk space on those computers See the Manager manual for details on these procedures 7 L1 Project Ownership and Write Protectio
58. ew Eurotherm Drives APPENDIX B MODULE MEMORY Most SSD LINK system modules consist of three hardware PC boards f Processor board f Power supply board f Application specific board The processor and power supply boards are standard throughout the SSD LINK system product range The processor module contains a fixed quantity of non volatile memory and ROM containing the operating system software There are a number of software items that make up the final functional program for the SSD LINK system modules B 1 THE I O LIBRARIES I O libraries are application specific routines that handle the I O interface for the modules They also handle certain core functions like PIDs which not all modules support Modules are shipped with default configurations and libraries which allow them to power up after connection to a network Working configurations must be installed from ConfigE d before real functionality is possible A completely unconfigured module has no knowledge of the type of I O hardware present When configurations are installed from ConfigE d the libraries are loaded into the target module There can be many I O libraries for a spedfic SSD LINK hardware module the library is specified when a new SSD LINK module configuration is created Other SSD LINK Processor module modules have No I O handlers resident I O library EEPROM Reduced EEPROM configuration space configuration space OM Handler Routines The size of the I O
59. f in the future the configuration has grown too large to fit the test points can be removed B 5 MEMORY BLOCKS When ConfigEd installs a configuration the following blocks are reported in the scratch pad f Block 1 EEPROM allocation table f Block 2 Persistent data items f Block 3 Patch file f Block 8 Fonts operator stations only f Block 16 Library application specific I O primitives f Block 64 Instructions f Block 128 Configurations instances and classes The number after each block reports the number of bytes free in the last page allocated to each block The most important block for the user is block 128 which contains the actual configuration B 6 MEMORY SPACE AND THE L5102 OPERATOR STATION The L5102 operator station module has the least available memory due to the large I O library and the necessary display function blocks It should be used for display and input function blocks only with an absolute minimum of other functions All signal processing and logic functions should be done in other modules B 7 SSD LINK OPERATING SYSTEM AND MEMORY SSD LINK uses function blocks loaded into the modules and connected together to form the configuration The operating system uses an object oriented approach allowing very effident use of the configuration memory within SSD LINK modules B 7 1 What isa Class When multiple function blocks of the same type are installed into a module the block s executable code is ind
60. ffected configurations Check the scratch pad to ensure noerrors have been generated during the project update procedure f If ConfigEd has been used to modify a configuration backup files are produced auto matically when the configuration is installed there is no need to use the Backup com mand f Export the project in read only form to the customer disk using Manager and replace the customer disk in the endosure 7 7 5 Before Leaving Site After performing the appropriate steps in Section 7 7 4 perform the following steps f Using Manager export the final modified and backed up project in read only form to the backup disk or local backup disk f Using Manager ensure the customer SAM database is up to date f Using Manager import the project from the customer disk to the customer s SAM database and replace the customer disk in the enclosure f Return the printed configuration drawings and the project configurations to the project design engineer f Using Manager export the configurations tothe SSD LINK Hub database and ensure all module configurations are present At this point the write token may or may not be transferred to the Hub database see the Manager manual for more information f If the backup disk has not been used to transfer projects to the site portable computer export the modified configurations in read only form to the backup disk and store the backup disk in the allocated storage area f Ensure the configurati
61. fiber optic system will have a defined operating transmission distance If the actual transmission distance is too short for the transmitter in operation the fiber optic receiver may saturate due to excessive light if it is too long the fiber optic receiver will be under driven In either case data will not be received Most SSD LINK modules have a fixed transmission power and operate over a range of 0 20m 0 65 assuming the cable is correctly terminated and the minimum bend radius of 50mm 2 is not compromised The fiber optic cable must not be abused during installation as it is sensitive to stretching which fogs the cable and greatly increases attenuation For some SSD LINK modules typically drive and repeater modules the transmission power can be selected The following table gives the transmission distance for these SSD LINK modules Fiber Optic Drive Power Level 0 20m 0 65 20 40m 65 130 High 40 60m 130 195 Drive levels are set by means of a switch on the module These levels are intended only as a guide they are by no means perfectly defined since other factors must be taken into account e g the number and sharpness of any bends in the fiber 12 SSD LINK Overview Eurotherm Drives If the power level is not set properly the resulting marginal operation may cause a spurious L Error of the modulein the system and the errant operation may not become apparent for some time Therefore light meters should be used during
62. ficient tests should be applied to the system to ensure the functionality matches that of the system specification where necessary the configuration files should be modified SAM may be used to aid testing of the system 7 4 3 Backing Up and Updating f If SAM has been used to make permanent modifications to SSD LINK module configura tions use the Update command within ConfigE d to update all SSD LINK modules Check the scratch pad to ensure no errors have been generated during the project update procedure f If the configuration files have been modified via ConfigEd during the course of the day export the project in read only form to the backup floppy disk using Manager and store the backup disk in the allocated storage area f Transfer projects to the Hub SSD LINK database 7 4 4 Modifying Configurations on the Hub Database f Transfer the configuration files from the test department computer to the Hub SSD LINK database f Modify the configuration files f Transfer the files from the Hub SSD LINK database back to the test department com puter before continuing with the test 7 5 SHIPPING SYSTEMS AFTER TESTING After testing but before shipment of the system the following actions should be performed f If SAM has been used to make permanent modifications to the project use the Update command within ConfigE d to update the affected configurations Check the scratch pad to ensure no errors have been generated during the project update f
63. from a PotM eter function block damped at 90 full range Scaling the analog input at 10V full scale and reducing it to 90 in software would not give any over range since the analog input SSD LINK value would saturate at 1 00000 The feedbacks for the Pot M eter function should be scaled to take into account f The 90 full scale operating point f The actual machine number to be displayed on the potentiometer e g 50 0K g 110 Ibs The winder tension loop shown in the above diagram is an example only application specific function blocks should always be used to implement winders 6 2 4 3 Saturation and Filtering With any industrial control equipment it is important that internal numbers produced during computation do not saturate The maximum possible SSD LINK value range is 1 or 100 any computations producing results outside this number range will be clamped at 100 Even if the average of a value is less than the saturation limit it is possible for ripple components to cause saturation The diagram below shows the effect of saturation on an SSD LINK value The function blocks are used to provide a 100 draw feedback to any operator station The actual draw range is 5 and therefore this must be multiplied by 20 to achieve the correct range to drive the operator station display SSD LINK Overview Eurotherm Drives 41 100 To operator station Correct value if no clipping occurs Incorrect value due to saturation
64. generated in the user s SSD LINK database induding three files relating to each specific module configuration NAME Main configuration file NAME SYM Symbol file generated during installation NAME CLS Class file generated during installation NAME BKU Backup file generated during installation SSD LINK Overview Eurotherm Drives 71 NAME refers tothenameof themoduleconfiguration specified by theuser in ConfigE d and refers toa three digit revision number This number starts at 001 for the first revision and increments when thereis a change tothe configuration as it is saved ConfigE d regulates the number of past revisions saved seethe user manual for details The SYM CLS and BKU files are generated or updated automatically when the configuration is installed to the hardware module using ConfigE d If a modified configuration is not installed to the module then the files are not updated A 5 1 Configuration Files and SAM There is not enough information solely within a module to allow SAM to access its parameters the cLs and sym files are required It is important these two files match the actual configuration within the hardware module Otherwise SAM will not work properly The following diagram shows the three files in a local computer database together with an actual hardware configuration File modified when configuration changed with ConfigEd Local database SSD LINK module CONFIGS dir
65. gnificant The timeout time is a configuration parameter entered in milliseconds 8 2 4 Network Errors and the L5203L E xception Logger The best way to identify transient network faults is to add an L5203L E xception Logger module to the system The network exception handler will report such problems to either a computer or a printer In the example below the fiber optic cable just before module 9 has a transient failure and the resulting messages from the L5203L E xception Logger are shown Operator station Address 6 Address 11 Address 10 Transient network failure Printer or computer with terminal emulator resulting text shown below Transient case ld 7h 12m 37s 571ms addr 9 Network Warning ld 7h 12m 37s 586ms addr 9 OK TheSSD LINK system will tolerate network warnings for up to one second If the warning persists for longer than one second a network failure is declared and modules System SSD LINK Overview Eurotherm Drives 63 Control function blocks will trigger a restart procedureand an LED status alarm Failure case ld 7h 12m 37s 57ims addr 9 Network Warning ld 7h 12m 38s 571ms addr 9 Network Failure 1d 7h 12m 38s 594ms addr 9 Shutdown ld 7h 12m 38s 606ms addr 8 Shutdown If the L5203L E xception Logger is not available it is possible to monitor the individual module system control function blocks using SAM or an operator station network monitor function block However the L5203L E xc
66. ication may fail anyway NOTE Since they both use the secondary channel it is not possible to have a redundant ring and a tapped topology on the same networked system 3 2 PREFERRED DIRECTION FOR THE FIBER OPTIC NETWORK Data messages may have to pass through many SSD LINK modules before they reach their final destination It takes 84uS for a message not addressed to a particular module to pass through it Therefore the total delay through a chain of modules induding repeaters is equal to the number of modules in the chain x 84uS This delay is quite short and therefore the assignment of functions to modules and their order in therring is not critical It is recommended however that the data flow follows the process direction shown bdow where possible This will result in optimum system performance SSD LINK Overview Eurotherm Drives 11 gt Process direction D Drive Processor Data direction SSD LINK fiber optic network Winder control Winder drive software block a Total delay gt 5 x 84uS 420uS 3 3 CONSTRUCTING THE FIBER OPTIC NETWORK The most common type of fiber optic used with SSD LINK systems is plastic multi mode cable which is inexpensive easy to terminate and suitable for short to medium transmission distances F or long transmission distances the glass cable option is preferable The following guideline information is given for plastic cable 3 3 1 Transmission Distance for Plastic Cable Any
67. ing over the SSD LINK network For a message passing through a module and not being absorbed the total delay for it to enter and exit the module is about 84uS see Section 3 2 6 4 11 2 Software Block Delays These are delays within the modules caused by the processing activity within the module The following diagram shows two connected function blocks The delay to execute the first block and pass a message to the second block is between one and two mS AND gate Message delay time This does not include any delays due to event queue activity which is increased with the number of messages connections within the configuration If there area large number of cascaded software blocks the total delays can be considerable The use of large application specific function blocks is highly recommended since this will cut down on the number of internal connections and therefore event queue activity The dosed loop control winder blocks are optimized for minimal delays in the feedback path It is very difficult to quantify the actual module delay time due to the event driven nature The critical path s should be kept as fast as practical Typically the feedback signal is the critical one 6 4 1L 3 SSD LINK Drives The SSD LINK drives operate in a way different from that of general SSD LINK modules Here the whole drive block diagram is executed at a regular scan time The block diagram is fixed and cannot be altered with ConfigE
68. ions is the logger s default behavior and no setup beyond that for the serial port is needed The L5203L logs module state changes throughout the system whether during startup shutdown reconfiguration failure or when even transient fiber optic problems occur Transient problem detection is very effective in isolating bad fiber optic cable runs as the message logs the exact address of the module detecting the poor signal at its receiver The remaining functions are used by creating and configuring the appropriate function blocks and connecting standard input connectors to them Note that unlike the exception logger which receives globally addressed information sent by default by all modules the event and data loggers must receive their inputs via standard connections This necessitates some configuration at the source as well All logging function blocks may be configured to indude a time stamp in their text Current SSD LINK modules have a sense of elapsed time since their last start up which is very useful in recording the temporal relationship in the logged events For more information on the L5203L Logger see the function block data sheets C 5 FILTERS There are three types of filter function blocks available within the function block library the simple filter filter and decimation filter Each has a particular application C 5 1 Simple Filter The simple filter takes the smallest memory space and executes when a message is receive
69. ject The SSD LINK database which contains function blocks as well as other items is periodically updated to add new function blocks and modify existing ones to introduce new or enhance existing functionality and to fix bugs When a new project is created information about the then current database is stored in it This ensures the project configurations won t require more module memory to install in the future as the core database grows Because of this snap shoty effect new functionality is generally not available to existing projects SSD LINK Overview Eurotherm Drives 73 If new functionality isneededin an existing project ConfigE d s Upgrade command will reset the project s snap shot of the database to the current revisions of the core database The penalty for using Upgrade is that the configurations may require more memory in the module to be installed For this reason Project Upgrade should be used with great care on commissioned systems to avoid running out of configuration memory and necessitating potentially widespread redesign The reason for leaving two free pages in a module configuration as discussed earlier is to allow upgrading while reducing the chance of running out of configurable memory Exporting a read only copy of a project using Manager before upgrading provides a fall back if the configurations fail to fit after upgrading See the Manager manual for more information on exporting projects 74 SSD LINK Overvi
70. king followed by 1 2 second on indicates the module is ready to start but is waiting for other modules on the network to become ready to start Check for modules that are stopped or in an error state the system will not run until all modules are ready EEM Continuous rapid blinking indicates the module has discovered a duplicate address on the network and has removed itself from the network and stopped If a system has two or more modules with the same address it cannot run Correct the problem by reconfiguring the offending modules One second on followed by a single 1 4 second blink off indicates the module has stopped as the result of a tools request This typically occurs during reconfiguration of the module One second on followed by two 1 4 second blinks off indicates the module is unable to run because it has no configuration Install a configuration using the tools software One second on followed by three 1 4 second blinks off indicates the module has stopped due to a low level internal error L error Run module Get Info from either SAM or ConfigEd see Section 8 3 3 If the problem persists contact your service representative One second on followed by four 1 4 second blinks off indicates the module has stopped due to a high level internal error H error If the problem persists contact your service representative One second on followed by five 1 4 second blinks off indicates the module has stopped due to a hardware err
71. land Tel 011 64 9 358 8 106 Fax 011 64 9 358 1350 NORWAY Eurotherm A S Postboks 199 N 1412 Oslo Tel 011 47 2 80 33 30 Fax 011 47 2 80 33 31 SCOTLAND Eurotherm Drives Ltd Unit 59 Stirling Enterprise Park Player Road Stirling FK7 7RP Tel 011 44 786 71674 Fax 011 44 786 51095 SPAIN Eurotherm Espana SA Calle La Granja 74 Poligono Industrial de Alcobendas 28100 Alcobendas Madrid Tel 011 34 1 6616001 Fax 011 34 1 6619093 SWEDEN Eurotherm AB Box 24 S 232 21 Arlov Tel 011 46 40 43 54 60 Fax 011 46 40 43 55 20 SWITZERLAND Eurotherm Produkte Schweiz AG Kanalstrasse 17 8152 Glattbrugg Tel 011 41 1 810 3646 Fax 011 41 1 8 10 8920
72. late to specific modules Further configuration information may be found in the SSD LINK tools manuals C 1 SYSTEM CONTROL Most SSD LINK modules contain a System Control block responsible for handling restart options and SSD LINK network monitoring and reporting SYSTEM CONTROL ae The block is configurable to allow the following restart options f Restart on network failure f Restart on module failure f Restart on reconfiguration The restart options can be configured as Enabled or Disabled If restart is disabled the module will not try to restart This is useful if it is important that the module should not shut down on SSD LINK network failure The default set up for these parameters should be Disabled but some initial configurations set them to Enabled TheL5203L logger isa notable example in case of a failure it would make no sense to shut down a module and have it attempt a restart at the same time it is trying to report the cause of that failure The System Control block can also be used with SAM to examine the state of the SSD LINK network The System Control block acts as a logging device recording the following network errors detected locally by the given module f Network message CRC errors f Network message overrun errors f Network message fragments All these logged messages indicate corrupt SSD LINK network messages that have been received and rejected by a particular module The network message f
73. lecting SSD LINK Network Problems 0000 61 8 3 Detecting Module Failures 64 8 4 Improper Operation uo cecceessseeeessssseeeessssaeees 68 2 SSD LINK Overview Eurotherm Drives Table Appendix Appendix Appendix Appendix Appendix of Contents A SSD LINK Database A 1 Database Description ssssessrsseserrrserrrrrssrrrrrreernns 69 A 2 SAM and ConfigE d Databases 70 A3 UME ID DAT Fie atesccrevsattenenenenetteeeensapheeestnednnuaninc 70 A 4 Database and Project Management s 71 A 5 Projet Configuration Files esseere 71 Module Memory B 1 Thel O Libraries sa caectesienaea tet soasoutedecasaatinawuscetaasuce 75 B2 Patdi File ss rete xiao eerie etseng eaten tuceebactsbnecesmesuamanemsurasen 76 B 3 How Much Can Fit in Each Module ee 76 B4 TSE PONTS sostccoscevetaccetniaesencauetieessstoenonetnctend TT B 5 Memory BOK S csoscecs cists cb escciciserenaeacioeesssnenitecniieste 77 B 6 Memory Space and the L5102 Operator Station TT B 7 SSD LINK Operating System and Memory s s s 77 Configuration Guidelines al System CONTO siirius innia 79 C2 Hando Sesionin aa iia 79 C 3 L5102 Operator Station sustihercssariscnaxnnesimmatineca 81 C 4 L5203 Serial Module ssssssssesssrrsseerrsseerrrrssrrrrnnsss 88 C 5 Filters asta else cop scence tacenatasasanethicesjacaceaaveaumenceess 91 C 6 Test PONTS Ji atveacieceds sssinceunassneasuesladoeadanaducnedeceeusiteanteus 92 ROM Issues D 1 Backup and RSS
74. legends however will be determined by operator station memory constraints C 3 2 2 Selecting Highlights Operator station buttons and annundators may be displayed as highlighted to allow attention to be drawn to a particular function Three operating states are possible for the highlights as shown in the following table Data Highlight Logic 0 Off 0 1 On 1 2 Flashing n a 82 SSD LINK Overview Eurotherm Drives The highlights are selected in a similar way by sending ordinal data tothe highlight input However the equality between logic and ordinal data can be used to select the highlight on or off as shown It is not possible to display the flashing legend via a logic input if a flashing highlight is required an ordinal switch function block is necessary The following diagram shows a logic gate connected to a pair of operator station highlights The inverted output of the gate is also used to drive a highlight Button Operator station q Highlight gt inputs Other SSD LINK systems Logic sender module It is possible to highlight potentiometer and meter function block names in a similar way This can be useful to indicate that a particular meter is active for example C 3 3 Operator Station Potentiometers and Meters The potentiometer and meter function blocks allow any SSD LINK variable to be adjusted or displayed As with any operator station function block these function blocks are loaded into the display handler
75. les of these blocks indude f Analog inputs of L5201 module SSD LINK Overview Eurotherm Drives 47 f Driveparameters f Samplers f Master ramp f Senders f Sramp f Push button ramp Refer tothe SSD LINK function block data sheets for details of these function blocks In general there must always be a timebase function block to allow analog function blocks to trigger continuously This is often an analog input Certain function blocks eg the simple filter must be clocked at a fixed rate These blocks are indicated in the function block data sheets Linear Ramp Speed setpoint 00 from pot 2 Sampler To drive HOLD setpoints 100 ms INPUT RATE NEGATIVE CLAMP POSITIVE CLAMP RAMP TIME Ramp to speed _ RATE CAL RESET ResetrampC ___ INPUT SLOTS OUTPUT SLOTS This diagram shows a typical line setpoint generator for one or more drives and associated configurations A 100mS sampler ensures the linear ramp is triggered on a regular timebase Any function blocks in this or another module supplied from the ramp output will now be triggered if the connection is to their trigger input s 6 4 7 Multiple Timebase Function Blocks Complex software blocks may have a number of internal timebase parameters triggering at different rates as specified on the data sheets Multiple timebases can help yield high overall performance for critical areas of application specific function blocks In the complex winding blocks fo
76. like buttons and annuncators When the potentiometer buttons are pressed the potentiometer takes the value of the setpoint adds or subtracts a small amount and sends this number from the output Addition or subtraction depends on the raise or lower buttons respectively and the magnitude of the change depends on whether a fasty or slowV button is pressed Since it is recommended that potentiometers be used with clamps the clamp output should be used as the feedback to the potentiometer setpoint as shown above Since the input of the clamp is persistent the current value of the potentiometer setpoint is stored even if the power is removed If it is always required to power up toa known value eg 0 use an initializer function block to pre set the damp input In addition to the potentiometer function block a dual potentiometer and meter function block is available which integrates the potentiometer and meter functionality into a single band C 3 4 2 WireOR and Potentiometers Potentiometer outputs can easily be wire OR ed for multiple displays Only one damp should be used The diagram on the following page shows three potentiometers connected to a single clamp 84 SSD LINK Overview Eurotherm Drives Module 5 Output Module 35 Potentiometer slots ine S Input Module 15 slot setpoint Potentiometer esei 4 DDD Module 25 Potentiometer e ddid DDD Output slots In this case the last potentiometer
77. m The following diagram shows an example where an AC ground return is shared by the transducer and amplifier drcuits ground line SSD LINK Overview Eurotherm Drives 97 Power Supply Power Supply G G Location 2 Return currents ij AC Power lt ft ____ Load currents Such an arrangement is highly undesirable but could arise from careless or unplanned system wiring The noise voltage Vn generated by the AC return currents flowing through the impedance represented by Rs and Ls appears between the ground connections at locations 1 and 2 This will offset the signal Vs relative tothe amplifier input and we will therefore find Vm K x Vs Vn This shows that the amplifier output is corrupted since Vn is not part of the signal we want amplified One solution tothis problem is to maintain a single point ground The aim of this scheme is to provide separate ground returns for each circuit thereby eliminating shared conductors and ground loops It is very effective in reducing noise due to low frequency lt 1MHz noise sources The diagram on the next page shows the additional ground wires necessary to provide separate grounds to each major section of the system 98 SSD LINK Overview Eurotherm Drives Power Supply Power Supply G G Location 1 Location 2 Single ground Return currents Poe i lt ____ ae Load currents Loads The voltage Vn is no longer part of any drcuit involving the tra
78. machine designer to ensure the final machine user is aware of the need totrip the emergency stop before working on the machine There are cases where moving machinery is unguarded and therefore exposed to the operator e g deaning a machine where the machine may be jogged while mechanical guards are open Operation of the drive hardware stop terminals during machine jog and start should be considered 5 1 2 2 SSD LINK Network Fail and the SSD LINK Drive If the SSD LINK network should fail for any reason it is likely that the drive will lose the ability to communicate with other SSD LINK modules The drive can be programmed to perform a number of actions should network communications be lost f Regenerate to zero speed f Coast to zero f Donothing If the SSD LINK network fails the action taken should be carefully considered for each specific application These actions are overridden by the hard wired drive stop inputs described above Refer to the L570 or L590 drive manuals for more information on SSD LINK network failure actions 5 1 2 3 Emergency Stop and the SSD LINK Network The SSD LINK network itself can have the ability to operate the emergency stop relay if required under the following conditions f SSD LINK network fail f Normal programmed system alarms Function blocks exist which allow the normal system alarms to be collected and prioritized within an SSD LINK module The following diagram gives guidelines to interface
79. mation on creating and maintaining the database and projects WARNING The SSD LINK database must never be copied from one computer to another If this is done the id dat file will be duplicated and project corruption will occur Eurotherm Drives will not accept any responsibility for project corruption due to duplicate databases The tools are also supplied with a cable to allow connection of a serial port on the computer tothe RTNX connection similar in appearance to a teleohone handset connection on the SSD LINK module WARNING Donot use any connectors adapters and or cables other than those supplied or recommended by E urotherm Drives F ailuretouserecommended materials can result in severe damage to equipment and injury to personnel and will void the Eurotherm Drives warranty The software tools are supplied on 3 5 disks and installation is provided through the Manager program also induded on the disks 6 SSD LINK Overview Eurotherm Drives Windows 3 1 or greater Manager SAM ConfigEd SSD LINK Desktop portable module network computer User supplied optional RS232 isolator 2 L1 Manager Manager allows users to import export archive and delete projects and import databases Manager is required to install SAM and ConfigEd as well as to install new and revised databases Manager is induded with the purchase of either SAM or ConfigE d 2 1 2 SAM SAM allows users to commission test backup
80. med Winder SPW f Current torque Programmed Winder CPW Application specific blocks have the following advantages f They implement very complex functions at high speeds and with minimal memory requirement thus saving module memory f They are already tested and documented f They offer greater performance than discrete function blocks could f They allow standard solutions that are easy to understand and implement It is highly recommended these standard application specific blocks are used to implement applications If your particular application requires additional function blocks not currently available in the library contact Eurotherm Drives The object oriented software allows the rapid addition of new function blocks to meet most customer needs 6 L3 General Details of Function Blocks In general a function block has three types of inputs outputs f Inputs which accept data from other function blocks f Outputs which send data to other function blocks f Parameters which are preset data not modifiable during execution of the module Most inputs can also be configured to have a preset state That data will be used until it is changed by a message being sent to that input Thus it is possible to use these inputs as parameters Parameters can be set with ConfigEd SAM may be used to set all inputs and get the current state of most inputs and outputs SSD LINK Overview Eurotherm Drives 33 6 1 4 Persistent Inputs A persiste
81. n An important part of the Hub user relationship is the concept of ownership of projects When a database creates a project that database owns the project and has write access to it That access is represented by a write token If a project is imported or exported in read write mode the write token travels with it to the new destination and confers the right to modify it Write token protection is intended to remove the possibility of multiple copies of the project being modified in parallel leading to conflicting configuration revisions overwritten files and lost work Project ownership is intended to ensure that one copy of the project exists somewhere in a permanent repository from which it cannot be deleted Transferal of project ownership typically occurs when either f The creating user database calls in toits parent Hub through a modem registers the project with the Hub and transfers ownership of and the token for that project to the Hub f Two Hubs sharing an archive move the project via the archive process Movement of the write token must not be done casually a decision must be made as to where the token legitimatd y belongs The project should only be modified by the holder of the write token See the Manager manual for more information on project ownership and the token 7 2 DESIGNING SSD LINK SYSTEMS This procedure describes how the SSD LINK systems are designed and how the configuration files are handled in the Hub da
82. n Network Fail option in the system control function block in the module configuration file It is important that the emergency stop relay is set to a safe state if the above digital module shuts down due to other reasons It is recommended that the relay on the output of the digital module should be energized in order to reset the emergency stop line If the digital module shuts down or power is lost the relay will de energize and the emergency stop will be activated 5 12 4 Emergency Stop and the Alarms Handler The alarms handler function block is used to collect many SSD LINK system alarms and to provide indication on an operator station display The alarms handler can also provide logic outputs to reset SSD LINK system latches and the emergency stop system The following diagram shows a digital I O module with the alarms handler used for this application Indicate on network fail Messages sent to Disable Restart on network fail within Inaicateon Ha shutdown va handler system control function block System Y Alarm crane Reset Alarm Channel stoplatches Alarm Handler etc Output inbut Acknowled channel npu cknowledge O Alarm Channel Drives and other alarms trip relay Input Alarm Channel Input channel Emergency REMOTE OPERATION STATION stop relay SSD LINK Overview Eurotherm Drives 27 Thealarms handler and the emergency stop relay inputs and outputs must bein the same digital O module In order
83. n power is applied and is set up at configuration time via ConfigE d Initialization is commonly used for state dependent logic blocks such as latches Persistent inputs always store the last data set before the system is powered down 6 4 10 1 Initializer Function Block The Initializer function block allows power on initialization of any variable These can be logic values or ordinals The initialized variable is sent only once on power up The required initialization state is set from ConfigE d Only one initializer function block for any given initial value logic or ordinal is required within a single module Initialization blocks are required only if no initialization state is available for a particular function block 6 4 10 2 Dormant Function Blocks On power up of an SSD LINK module any function blocks which do not have persistent parameters are activated only when triggered by an incoming message f such a function block never receives an incoming trigger message it will remain in a dormant state in the SSD LINK module Accessing an input through SAM which has never received any input will return its initialization state whether persistent or not 50 SSD LINK Overview Eurotherm Drives 6 4 11 Execution Times Timing delays within the SSD LINK system can be broken down into two areas f Network message passing delays f Software block message passing delays 6 4 11 1 Network Delays These are short delays for messages pass
84. nced to the system OVDC line or signals which are grounded for safety reasons WARNING Safety concerns are of paramount importance when configuring and wiring any industrial equipment Always obey local electrical codes and regulations and adhere to industry standards when wiring SSD LINK systems System Power Isolated Fiber optics Fiber optics le SSD LINK D gt l D gt lt lt module OVDC common 4 2 1 Power Supply The following diagram shows the network fiber optic connections primary channel and secondary channel and power terminals for a typical SSD LINK module The power terminals are duplicated to allow daisy chaining of the 24V and OV power connections The maximum current that can flow through a pair of terminals is 8A SSD LINK Overview Eurotherm Drives 17 MODULE LAYOUT RTNX Status LED port Secondary channel Power Uy O s 24V OV Primary channel 24VPOWER CONNECTIONS Some SSD LINK modules e g drives gateways repeaters and modems may not conform exactly to the above diagram Appropriate documentation should always be consulted before connecting SSD LINK modules Use the module data sheets to calculate the total 24VDC supply amperage required by your particular assortment of modules and then choose a power supply rated for that load In general it is not permissible to connect two or more power supplies together in parallel in an attempt to boost available current capacity
85. nk annundators 2 Create the handler function block if required some exist by default 3 Allocate in the handler the channels defined in step one It is most important that valid handler channels are available in the list of function blocks before attempting allocation within the handler In ConfigEd both the handler and its channel function blocks appear in the module function block window see operation station examples in Section 6 1 7 The digital module I O handler is used to specify the placement and type of I O allocated to the hardware terminals It is recommended that any spare digital 1 0 be defined as inputs As with any handler there must be the same number of digital function blocks as required by the handler C 2 2 Alarms Handler This function block allows multiple alarms to be handled It produces logic outputs and an ordinal output to drive an operator station display 80 SSD LINK Overview Eurotherm Drives The following diagram shows an alarm handler in use together with an operator station annunciator Each alarm channel is associated with an operator station annundator legend There is a default legend Legend 1 that is displayed until an alarm is present Operator Legend 1 Annunciator Legend 2 station Legend 3 Legend 4 Legend 5 Legend 6 Other SSD LINK Ordinal sender systems module Acknowledge Display output input Alarm channel Alarm output Low air pressure ae a Alarm channel EEE a Al
86. nsducer and amplifier elements so the amplifier output returns to Vm K x Vs Note that this diagram does not show strict single point grounding since the system still contains some lengths of shared ground conductors The transducer and its power supply share a ground between Location 1 and the grounding point and similarly for the amplifier and its supply The two loads shown on the AC power bus also share a ground return For most systems however the main concern is to provide separate grounds for subsystems to avoid cross coupling between AC and DC sections power and signal sections and analog and digital sections E 3 USE OF A OV BUSBAR TO CONNECT POWER SUPPLIES With the SSD LINK system the signal OV and the 24V PSU OV must be the same The 24V OV is normally implemented with a busbar as shown in the diagram on the following page The busbar is normally grounded per standard wiring practice SSD LINK Overview Eurotherm Drives 99 Source of analog signal 24V power suppl Analog I O P ad To analog input S OV busbar OV busbar ground NOTE Each channel of a digital 1 O module can sink a current in excess of 100mA therefore if all twelve channels are sinking the module will sink 1 2A 100 SSD LINK Overview Eurotherm Drives EUROTHERM DRIVES INC 1808 Michael Faraday Court Reston Virginia 22090 5303 Telephone 703 471 4565 f Fax 703 471 0723 CALIFORNIA 435 El Caminito Livermore California 94550 5312
87. nt item is any state that is retained in the event of a loss of power Like any other value input or parameter they can be set by SAM ConfigEd or another function block output Persistent items set by SAM will not be lost when the module is powered down This can be quite useful since the last value or state of the persistent input will be restored when power returns Most common inputs to function blocks are persistent and these are usually specified in the data sheets 6 L5 Organizing Configurations The following sections provide some recommendations that should be followed when organizing configurations for an SSD LINK system 6 1 5 1 Choosing Function Blocks When a new hardware module is specified in ConfigEd a configuration appears on the computer screen containing application specfic and common software blocks To set up the configuration function blocks are placed into the on screen representation and the function blocks are then connected both within the module and over the SSD LINK network through the graphical interface of ConfigE d Two names are used to reference each function block f Type name Name as defined in the function block data sheets e g Annundator f Name User defined name referring to a specific block in that configuration e g Status Some function blocks are module specific and may not be used in every type of module Each function block type has a data sheet describing what it does and how t
88. o allow for any over range SSD LINK Overview Eurotherm Drives 85 Full range required display number Full range SSD LINK number Gain This does not include the decimal point When scaling a drive if the full speed setpoint is 0 833 and this has to correspond to an indicated top speed of 500 0 FPM 500 Gain ___ _ 600 8333 For this case the damp on the potentiometer output must be set at 83 333 The F ormat would be set at 4 FPM four digits one decimal point C 3 4 4 Senders and Potentiometers It is important to use sender function blocks for certain variables going to remote modules Since the potentiometer does not store the variable to be adjusted the sender must be placed correctly at the clamp output CORRECT SENDER PLACEMENT Potentiometer Line Speed Line Speed RENE gt D Value sender OPERATOR STATION REMOTE MODULE The damp is located in a remote module to maximize operator station memory C 3 45 Meters Meter function blocks display the connected SSD LINK variable in two ways on the operator station screen f Digital feedback variable f Analog trend display Measured Value 0 DIGITAL FEEDBACK ANALOG DISPLAY The meter feedback is connected to the measured value input The digital feedback variable is scaled in exactly the same way as the potentiometer feedback variable using the Gain parameter The analog trend display has two set up parameters These specif
89. o the back of the queue f When the event reaches the front of the queue it is renoved and the relevant software block is processed to produce its outputs f If the outputs are connected to other function block inputs as is normally the case this may create other events 44 SSD LINK Overview Eurotherm Drives 6 4 2 Trigger Inputs Each function block has one or more trigger inputs special inputs which allow the function block to be executed when messages are received f no messages are received at the trigger input the function block will not execute It is important to connect trigger inputs correctly A PID function block with a trigger input is shown below It is common for the feedback value to be the trigger input Any messages on the feedback cause an event to be generated and execution of the PID In the example below an analog input feeds the trigger input with messages at a constant pre set rate of 100mS Hardware Feedback analog input trigger input sampled at an adjustable rate 100mS DERIVATIVE Output FEEDBACK INTEGRAL ENABLE JL_SL_JL_ KA F INTEGRAL NEG FB LIMIT PG LIMIT PID ENABLE POS FB LIMIT PROPORTIONAL SETPOINT PID executes only on feedback events Setpoint A M N E PID will not execute if events are sent to the setpoint In general trigger inputs of function blocks are specified in the data sheets If no trigger inputs are specified it is assumed that all of the inputs are trigge
90. o use it Please read and understand the data sheets before attempting to configure function blocks into a system 6 1 5 2 Duplication of Components SSD LINK isa very flexible configurable drive control system As with any flexible system steps can be taken to reduce the amount of engineering time used to configure the system by standardization Many line drive systems consist of a number of identical control sections e g in line load cell controlled nip rolls To save time design one of these sections completely then duplicate it for the additional control sections This approach can be taken further by designing standard module configurations and modifying them to suit the current project It is possible in some cases for jobs to be duplicated in their entirety and used as templates for later jobs Theoretically this approach could eliminate virtually all engineering time associated with configuring additional drive control systems 6 1 5 3 Standard Function Blocks The use of standard application specific function blocks can reduce engineering time considerably For example implementing a dosed loop load cell controlled center wind control is simply a matter of using a single function block 34 SSD LINK Overview Eurotherm Drives There area number of standard function blocks available induding f CPW Open loop center winder control f SPW Closed loop center winder control f Section control Draw ratio control with close
91. odule the analog input can be connected to a Logic Comparator function block with the yv input preset to 50 to convert the input value to a logic state See the following illustration Comparator Analog input Digital output 4 6 PLC amp SUPERVISOR COMPUTER INTERFACE There are several ways an SSD LINK system can interface to PLC and supervisor computers 46 1 Direct Wiring The simplest and potentially most cost effective method uses direct wiring between SSD LINK digital I O modules and the PLC as illustrated in the following diagram SSD LINK Overview Eurotherm Drives 21 SSD LINK network L5203 Digital I O serial module module Hard wired connection for high speed logic signals RS232 or RS422 serial link for accurate parameter transfer setpoints etc This technique is suitable only for the connection of logic signals between the PLC and SSD LINK If it is required to transfer values a hybrid system can be used A digital O module is used to transfer the logic signals and an L5203 serial module can be used to transfer values Many PLCs and supervisor computers have programmable communications drivers These can be easily programmed to suit the L5203 Eurotherm BiSynch protocol see the L5203 operating manual for details Since SSD LINK is a programmable control system the amount of hard wiring between the PLC and SSD LINK can bereduced For example a single wire connection can be used to start a num
92. odules are also connected together over the SSD LINK network To specify connections the outputs of function blocks are always connected to specified inputs In ConfigEd input connections are always drawn from source to destination The following diagram shows typical function block connections both within the local module and over the network SSD LINK Overview Eurotherm Drives 43 Remote network connection DERIVATIVE FEEDBACK INTEGRAL ENABLE INTEGRAL Destination Destination NEG FB LIMIT address slot PG LIMIT eee Function block PROPORTIONAL Internal SETPOINT connection 6 4 EVENT PROCESSING SSD LINK is an event driven system not a scan based system as found in PLCs 6 4 1 Event Queue Description The microprocessor within each module performs one task at a time Therefore an event queue is used to allow events to be stored pending processing The following diagram shows three events lined up on the queue Events to be processed Top of queue is v y y processed next Event queue AND OR INV Processor Input change generates an event Output is updated Input change aND when AND is processed The module devotes all unused RAM tothe event queue a first in first out FIFO stack Overtaxing a module causes the event queue to exhaust all of this free memory and cause an L Error Out of Heap When an event occurs the following actions take place f The event is posted to the event queue generally t
93. on a single network f 2 7M Bits per second data transfer f 12 000 messages per second network bandwidth per segment f Hardware error detection f Hardware fiber optic failure detection and recovery f Optional fault tolerant dual ring The SSD LINK network is based on a ring topology and uses fiber optic cable to transmit the data Each SSD LINK module has one or two network interfaces 3 1 NETWORK TOPOLOGIES The network is arranged in one of three topologies simple tapped or redundant ring 3 L1 Simple network topology This is the most cost effective SSD LINK network topology Each SSD LINK module has at least one fiber optic transmitter red and fiber optic receiver black When the simple network is used the set next to the module s power terminals is used as shown in the diagram This is known as the primary channel TYPICALSSD LINK MODULE Secondary RINX Power p 5 channel S ao rocessar epee Pina e channel P Operator Station Operator Station The data passes around the network in the direction shown by the arrow The network operates by the source module placing data onto the network Data then passes through the various SSD LINK modules until the final destination is reached At this point the data is removed from the network Protection is built in to remove messages that pass completely around the network to the source module SSD LINK Overview Eurotherm Drives 9 3 L2 Tapped network topology
94. ons STANDARD MODE Event posted to Normal SSDLINK back of queue connection Input event T 5 20 Input slot AND 6 4 5 2 Priority Input Slots Priority input slots are used for special time critical applications They are typically used when functions are distributed across modules but must respond as though they were located in the same module When a message is received to a priority input slot an event is generated which is placed at the front of the event queue This forces the message to be executed very quickly Other events already in the event queue are delayed by the priority message PRIORITY MODE Priority SSD LINK Event posted to connection front of queue Input event _ Input slot Restricting the number of priority inputs is wise since the larger the number of priority inputs the less priorityV each will be given Using many priority inputs could also slow significantly the processing of the normal inputs 6 4 6 Timebase Function Blocks In SSD LINK certain specialized function blocks execute and send data at a constant rate They are generally analog processing functions where a group of connected blocks must execute continuously This would be the case for feedback variables for closed loop control With these blocks it is often possible to specify in ConfigE d the timebase or the rate at which data is sent from the output Blocks which implement a timebase are usually specified in the data sheets Examp
95. ons are up to date on the SSD LINK Hub database before using Manager to delete the project from the site computer SECTION 8 TROUBLESHOOTING 60 SSD LINK Overview Eurotherm Drives D Li y K systems feature many powerful di agnost ctools toassist in Wiles eshooting 55D i hel problems with the SSD LINK system 8 1 NETWORK EXCEPTIONS The SSD LINK network passes either data cells or S start stop cells through the fiber optic ring continuously S cells are signals sent through the fiber optic channel to signify the beginning and end of data messages and as filler between data messages At notime will a healthy ring be without a logical transition for more than a few uS A number of tests and constraints are applied in hardware to the incoming data stream to ensure integrity of both the raw signal and the packets received Whenever this hardware detects an error lack of properly timed cells malformed packets bad CRCs etc it raects the data and alerts the module s CPU Low level functions forward the relevant information to the System Control function block in the detecting module the one whose fiber optic receiver detected the errant signal and transmit global network exception messages to all other modules The System Control function blocks in each module receive these messages and collectively maintain a local and global sense of the ring s health SAM may be used to access the System Control function block in SSD LINK modules
96. ontinuously through all pending messages The network monitor is intended to provide the operator with information about the cause of a system shutdown due to network or module failure It may not detect borderline network segments since those warnings can occur and then clear within one operator station screen refresh For diagnosing these and other potential problems during commissioning or servicing the L5203L E xception Logger see Section 8 2 4 is a useful tool 8 2 2 Logic System Monitor The System Monitor performs the same function as the network monitor but instead of a graphical display it generates a logic output An example of its use would be to shut down a drive line after detection of a network error 62 SSD LINK Overview Eurotherm Drives The function block may be configured to indicate when one or more of the following conditions occur f A module is halted f A module has a missing or bad configuration f A module crashes f A module has an H high level error f A module fails self test f A module detects a network warning f A network detects a network failure 8 2 3 Logic Watchdog The watchdog function block implements a timer function and provides both non inverted and inverted outputs It contains a timer which is restarted by the receipt of a message at the input Any kind of signal may be connected to the input the fact of its receipt rather than the information contained in a received message is si
97. or Replace the module 8 3 2 Module List To determine the cause of a module error attach a computer running eather SAM or ConfigE d to the system call up a module list and locate all modules in an error state Causes of failurein an SSD LINK module indude f Maximum processing throughput exceeded SSD LINK Overview Eurotherm Drives 65 f Configuration errors f Hardware failure The following faults can be diagnosed from the module status Module List Status Possible Cause Action f Very slow module list update f Fiber damage or incorrect length f Truncated list f Incorrect launch power fiber optic light level at a drive or repeater f Errors while updating the list f Wrong software tools baud rate reset to lower baud rate RTNX router module busy plug computer s RS232 cable into another module f Health status checking network f Broken or damaged module or fiber cable divide and conquer by repeatedly splitting ring s in half until the problem module or cable length is singled out f Health status halted f Can happen when configuration installations fail oyde power supply or restart using tools Replace module if problem persists f Health status duplicate address f One or more other modules have the same address as this module reconfigure install restore as needed f Health status No Config f Novalid configuration install or restore configuration f Health status peer halted f Waiting for another mo
98. or the SSD LINK module in question Installation trunking systems may introduce extra fiber optic cable length not accounted for in the original network design The possibility of this occurrence should be taken intoaccount when designing an SSD LINK system SSD LINK Overview Eurotherm Drives 61 It is highly recommended that L5206 2 00 repeater modules be used wheretheSSD LINK network must connect to remote desks or endiosures The transmission range can be adjusted to a maximum of 60m 195 Multiple repeater modules or the L5206 2 02 plastic to glass adapter module should be used for longer runs Special function blocks are available to allow configuration level handling of some network exceptions and problems The function blocks are f Operator station Network Monitor f Logic System Monitor f Watchdog f L5203L E xception Logger For additional information refer to the appropriate function block data sheet 8 2 1 Operator Station Network Monitor The Network Monitor function block allows the SSD LINK network to be monitored continuously using a single display band in any operator station The diagram below shows the network monitor in use Address 10 Network Failure Address 10 Address 20 Address 14 in fiber Address 11 Address 12 Address 13 To ensure the most recent and accurate state is shown the display for each address is unlatched When each module becomes healthy its indication disappears The display cycles c
99. p Coast stop The emergency stop relay contacts are wired tothe program stop and coast stop terminals The program stop terminal is operated via a direct contact and the coast stop a delay off contact of the emergency stop relay When the emergency stop relay is opened the drive is forced to program stop The drive will ramp to zero speed using regenerative operation if applicable When zero speed is achieved the drive will stop The delay off contact shown should be set to a time which exceeds the ramp to zero time under program stop If the drive fails to stop due to a malfunction the delay off contact forces the drive to shut down via the coast stop terminal 5 1 2 1 Safety and Drive Start The SSD LINK network can be used to start and stop drives controlling potentially dangerous machinery the touch screen operator station can also be used for a similar function As with any electronic industrial control system the effect of a single failure should be carefully examined It is quite possible that a single programming error or a module failure could cause drives to start This could cause equipment damage or injury to personnel It is most important that some form of electro mechanical protection be provided to prevent this single failure risk when personnel are working on the machine This could be SSD LINK Overview Eurotherm Drives 25 implemented using the emergency stop system outlined above It is the responsibility of the
100. ported by all devices on the bisynch network typically 19200 baud At any rate below this El bisynch should not be used for even medium speed control parameters 88 SSD LINK Overview Eurotherm Drives Further Eurotherm Drives recommends that closed loop feedback and cascaded linedrive setpoints not be transferred via bisynch if they are it will be nearly impossible to maintain accurate drive control while ramping Similarly high speed logic signals such as drive start and jog are often inappropriate for transfer via bisynch In general El bisynch is suitable for f Transferring setup parameters setpoints recipes etc f Transferring low to medium speed Logic signals forward reverse mode etc f Monitoring and diagnostics at low speeds Both the baud rate and the size of the parameter set affect throughput and some allowances can be made under the binary protocol if high baud rates can be used to transfer only a few parameters Thorough testing of functionality and performance is always a must C 4 12 Distributed Parameters The L5203 module is often used to allow supervisory computers or PLCs to set system parameters which are also accessed using L5102 operator stations The following diagram shows how to properly connect serial parameters in systems where operator station potentiometers are also used OPERATOR STATION Potentiometer Input 1 Pe ax IL DI DD 100 Anal nalog parameter S pan SERIAL MODULE Serial link
101. processing With SSD LINK a dramatic increase in system functionality can be achieved This section provides some guidelines to help reduce the amount of engineering effort needed when designing systems 5 1 SAFETY AND SSD LINK SYSTEMS The SSD LINK system is typically used to control potentially hazardous moving machinery With any control system it is vital to ensure operator safety and the possible effects of failure must be considered to avoid any possibility of injury or damage due to unexpected movement of machine parts It is the responsibility of the machine designer to ensure that a thorough examination of all hardware and software is carried out prior to start up of a system This section gives some guidelines as a starting point for these safety considerations It must be stressed these are guidelines only Each system should be carefully considered in its own right and appropriate standards and regulations should be followed The SSD LINK network should not be used to implement an emergency stop since if a failure occurs the emergency stop may operate in an unpredictable way 5 L1 Emergency Stop An effective emergency stop system is important to avoid equipment damage and injury to personne should the process or the control system fail A typical emergency stop system would consist of approved mushroom head push buttons placed at strategic intervals around the machine to be protected Pushing any of these buttons should stop the
102. r example the critical performance area is the dosed loop control and inertia compensation functions All diameter calculation and tension demand processing is performed at a slower timebase rate This allows more processor time to be allocated to servicing the feedback loop at a fast sample rate The timebase parameters may be set to quite long values Within SPW for example the diameter calculation is performed at a default of 300mS intervals If non trigger variables are sent to blocks which operate on a timebase the data must be applied to the inputs for at least the triggering timebase length If this is not done the data may not be sampled Sending them more often is wasteful and does not improve performance The following diagram shows a simplified part of the complex winder function blocks The tension enable input is shown as a short pulse applied for a time shorter than the function block timebase In this example the tension enable input will not be sampled reliably 48 SSD LINK Overview Eurotherm Drives Multiplier Disconnect gt switch Tension demand Triggered Dancer cal at 300mS timebase Dancer Input Select loading Timebase a gt Tension Reset pulse gt lt enable too short 200mS 6 4 8 Event Queue Overflow A module s CPU has a finite processing capacity meaning there is a maximum number of events that can be processed per second If this rate is exceeded the event queue may exhaust its
103. r inputs In ConfigEd application specific blocks such as the speed profiled winder SPW and current profiled winder CPW have their trigger inputs labeled T See function block data sheets for details 6 4 3 Forcing Function Blocks to Trigger Sampler function blocks can be used to force other function blocks to trigger in a certain way The following diagram shows two operator station potentiometers connected toa multiplier If input 2 is adjusted the multiplier output will not be updated since the multiplier input X is the trigger input The multiplier output will however be updated if input 1 is adjusted since it is connected to the trigger input SSD LINK Overview Eurotherm Drives 45 INCORRECT CONFIGURATION Input 1 qd a PP sate Operator MW 45 dd BE P PD Multiplier station AN Output potentiometers Input 2 P 3 23 A Multiplier does not execute if only this pot is adjusted The following diagram shows a sampler connected to the multiplier input This will trigger the multiplier and update the output on a regular basis Add sampler to force the Sampler multiplier to always execute a Input 4 Operator 67 e e 200s eer station X otentiometers p A aa eE o 6 4 4 Disconnecting Trigger Inputs Under certain circumstances it may be desirable to prevent function blocks from executing A special switch function block allows events to be prevented from triggering function blocks as sho
104. r the demand on the processing capability of the configuration A burst of network warnings can also cause L errors in heavily loaded modules use an L5203L Exception Logger to catch these see Section 8 2 4 Display processing tasks occupy a significant percentage of L5102 operator station microprocessor resources E xtra attention to potential overloads should be given to these modules High data rates should be reduced using for example the decimation filter 8 3 3 2 Illegal Values Ordinal outputs should not be connected to function blocks having value inputs Such connections can result in illegal values which can generate L errors and cause modules to crash An ordinal to value conversion function block is available and must be used when ordinal to value connections are required 8 3 3 3 Shorting Links A length of fiber optic cable can be used to temporarily short outy modules on the network This technique can be used to identify the module causing others on the network to enter the peer halted state SSD LINK SSD LINK module module NORMAL SSD LINK SYSTEM SSD LINK SSD LINK module module SSD LINK module Direction of data flow SSD LINK module Using a length of fiber optic cable create a link between non consecutive modules on the network Bypass questionable modules one by one and attempt to restart the system This procedure should be followed until the peer halted module will re
105. ragments are the most useful for detecting fiber optic problems E ach module s System Control should be examined to find which module is receiving excessive errors The fiber optic cable supplying that module should be examined for improper length or damage and light levels at the receiver should be checked with a light meter The L5203L logger described in Section 8 2 4 performs some of this data collection continuously C 2 HANDLERS A handler is a function block that groups together other specific function blocks Handlers are used to simplify the configuration and set up of multi channel functions The handler may specify the position of a particular function block on the display of a operator SSD LINK Overview Eurotherm Drives 79 station Examples of handlers include f Digital 1 O handler f Alarm handler f Operator station display handler f Operator station button band C 2 1 Operator Station Display Handler The following diagram shows a typical handler used to specify an operator station display Configuration Hardware w w w w w os a ad wos eS as g g g g g Operator Station display function blocks w gt Zz g Display handler function block In order to use a handler the following procedure should be adopted 1 Create the individual channel function blocks which must have unique names Even if the channel location is not being used a unique function block of the proper type must still be created e g bla
106. rations To ensure the current configurations are used when modifying systems transfer the project configurations from the SSD LINK Hub database to the site computer The configurations may be transferred from the Hub database using the backup disk or through use of a modem 7 6 3 Daily Commissioning If the configuration or any parameter is to be changed in any way during the course of the day use SAM to change set up parameters within the modules ConfigE d must be used for all configuration changes f SSD LINK drives should be commissioned using instructions in their operating manuals and standard procedures f With ConfigEd backup files are produced automatically when a configuration is in stalled there is no need to use the Backup command If SAM is used to change the parameters of a module then the Backup command must be used from SAM or Update must be used from ConfigE d 7 6 4 Backing Up and Updating If the configuration or set up is changed in any way during the course of the day perform the following steps f If SAM has been used to modify any set up parameters use the Update command within ConfigE d to update the affected configurations Check the scratch pad to ensure no errors have been generated during the project update procedure 58 SSD LINK Overview Eurotherm Drives f If ConfigE d has been used to modify a configuration backup files are produced automati cally when theconfiguration isinstalled thereisnoneed to
107. restore and service configured SSD LINK systems on site All users and customers of SSD LINK systems should have access to a copy of SAM Your purchase of SAM includes a key to enable your computer to run the software 2 L3 ConfigEd ConfigE d allows users to design configurations using a full block diagram graphical interface and install them into SSD LINK modules The key supplied with ConfigEd also allows SAM tobe used and SAM is induded in your purchase of ConfigE d 2 1 4 Communicating With SSD LINK Networks All SSD LINK I O modules are supplied with an RTNX serial port connection similar in appearance to a telephone handset socket for communicating with an RS232 serial port on a computer equipped with either SAM or ConfigEd L590 drive modules and most gateways do not contain these ports and so cannot be accessed or controlled directly from your computer Once you connect your computer to any single SSD LINK module through the RS232 RTNX connection however you will have global access to all modules drives and gateways in that network WARNING Careshould betaken to use only connectors adapters and cables supplied or recommended by Eurotherm Drives Since most modules also provide 24V power through the RTNX connection failure to use recommended materials can result in severe damage to equipment Communication rates between your computer and the network are selected in the Comms menu in either SAM or ConfigE d communica
108. s 95 Power Supply Power Supply G G Amplifier GROUND LOOP Location 1 Location 2 The physical connection will normally consist of a ground wire linking the two locations The ground loop allows extraneous magnetic fields to generate currents that will circulate through the loop thus flowing through the signal shield This interference will induce noise voltages onto the shielded signal which degrades the signal accuracy To eliminate the interference the loop must be broken This can be accomplished by either f Removing one of the connections at the shield shown below Power Supply Power Supply G G Amplifier Location 1 Location 2 96 SSD LINK Overview Eurotherm Drives f Or removing the ground connection at the transducer Power Supply Power Supply G G Amplifier X Loop broken Location 1 Location 2 In the latter case we will force any ground currents between the two locations to flow through the shield If these currents are significant this option may not help to reduce interference to the shielded signal E 2 CROSS COUPLED GROUNDS Cross coupling occurs when a length of ground conductor is common to two or more circuit loops Any conductor has an associated series resistance and inductance and a current flowing in the conductor will generate a voltage The problem arises from ground currents generated by one circuit causing voltages to appear in series with other signals thus degrading the
109. s in which data mismatch can occur including f Power failure of part of the system asynchronous start up f Modifying part of the system with SAM f Network communications error To prevent any mismatches a sender function block is used for logic outputs transmitted over the network SSD LINK Overview Eurotherm Drives 49 Module 1 Module 2 Logic Logic 1N sender Logic 1 To AND gate Logic1 AND gate Sender updates data every few seconds A sender has one input and one output When a message is received at the input it is immediately passed to the output However when no input messages are received the output sends the data at a slow background rate of every two seconds this is known as a lazyV update In general senders should be used for all data sent out over the network which is not timebase triggered Since logics are normally sent only on change senders are particularly important when sending logics on the network Senders are not required for f Connections within a single module f Potentiometers f When data is sent over the network via continuously triggered function blocks 6 4 10 Initialization It is important that the SSD LINK system software blocks achieve the correct state on power up Otherwise data mismatch can occur on power up of the whole system Some function blocks have an initialization state which can be set on power up This initialization state determines the function block state whe
110. sed only for operator station function blocks especially when the operator station is used for alarm annunciation where a number of different legends are stored Legend text takes up some configuration memory C 3 2 Display Legends and Highlights The operator station has the ability to select different legends in response to a logic variable The push button and annundator function blocks allow different legends to be selected in response to an ordinal input derived from a number of sources C 3 2 1 Selecting Legends The following sample configuration shows the use of an ordinal switch to allow two legends to be selected A latch function block is used to implement forward reverse selection for machine direction The latch is used to toggle the logic variable in response to a single push button input The button text will change to indicate the current state The latch function block may be persistent therefore its logic state is stored when the power is off Annunciator or Button Forward Legend 2 Reverse Operator station Other Ordinal itch Ordinal SSD LINK iouietatah a onde systems module Latch state is persistant Direction J Reverse Forward Legends are selected using ordinal data from the switch connected to the annunciator legend input A number of different legends can be programmed to suit the application The theoretical limit to the number of legends that can be selected is 255 The actual total number of
111. start Using this technique the source modules causing the problem can be found SSD LINK Overview Eurotherm Drives 67 SSD LINK SYSTEM WITH TEMPORARY CABLE SSD LINK module SSD LINK module Temporary fiber optic cable SSD LINK module SSD LINK module Normal fiber optic gt aa cable unplugged SSD LINK module SSD LINK module Direction of data flow 8 4 IMPROPER OPERATION Many SSD LINK function blocks have trigger inputs If a function block is not triggered properly its outputs will not be updated This can bring on a situation where apparently valid configurations do not work Other problems could indude incomplete configuration or lack of familiarity with a function block These problems should be detected and corrected as part of the system test procedure performed prior to shipment to the end customer Once the SSD LINK system has been properly installed and commissioned SAM provides a powerful diagnostic tool for system troubleshooting 68 SSD LINK Overview Eurotherm Drives APPENDIX A SSD LINK DATABASE A 1 DATABASE DESCRIPTION The SSD LINK database structure is a collection of directories containing files The root of the directory structure is a directory named ssd_link The database contains the following file items f Function blocks f New module configurations f 1 0 libraries f Project configuration files f SSD LINK configuration tools
112. switch input then a safety hazard exists To prevent a potential safety hazard do not connect the 18 SSD LINK Overview Eurotherm Drives module s power common or OVDC signal commons to ground when using a module with active low digital inputs See Section 5 1 3 The L5102 and the L5206 have the OV terminal internally connected to the case which will cause the OV to be grounded The L5209 digital input module uses active high inputs and can be safely grounded 4 2 2 Signal wiring Signal wiring should be kept separate from power wiring wherever possible to prevent power transients from interfering with signal voltages and currents Shielded pair or twisted pair conductors e g Belden 8723 UL 2493 should be used for analog signals and serial communications signals Signal wiring should be run in separate wiring troughs or raceways and where power and signal wires must cross route them so they cross at right angles to minimize interference When using shielded cables for sensitive signals only one end of the cable shield will normally be terminated The shield should be left unconnected at the signal source and terminated at the signal destination this is done to prevent currents from flowing along the shield as a result of slightly different ground voltages which may exist at the cable ends and to keep interference toa minimum at the receiving end of the signal For best performance pay close attention to the interconnection of gro
113. t rate must be reduced to prevent module overload and an error of 0 1 in output is acceptable with large decimation values The decimation filter is particularly useful for operator stations C 6 TEST POINTS Test points are used to simplify the use of SAM when configurations are to be monitored and set up Test points are added when the modules are configured The following diagram shows a typical block diagram with test points TP 1 TP 2 J og SP added to commonly used points within the configuration Setpoint Setpointtri m amp ratio Setpoint switch TP1 Total setpoint Inch start The actual test point text is stored within the module configuration memory allowing SAM to access the test points without having the configuration files on the same computer In order to achieve full SAM access to all function block information the up to date configuration files must be present 92 SSD LINK Overview Eurotherm Drives Tominimizemodule memory requirements thetest point text should be kept short Test points could be allocated within the two page boundary of free configuration space if the configuration files become too large in the future the test points could be deleted When SAM is used the test points can be used to set and monitor a variable When test points are defined they may be read only or read write This allows the use of selective test points while preventing unauthorized users from making changes SSD LIN
114. t the network For more information on the software tools see Section 2 and their respective manuals SSD LINK Overview Eurotherm Drives 5 SECTION 2 COMPUTER TOOLS SSD LINK is a configurable drive systems product range In order to configure the modules an IBM PC compatible computer with a 386 or greater processor running Windows 3 1 or later and a mouse or other pointing device is required along with configuration software tools from Eurotherm Drives F or requirements specific to individual tools refer to the manuals for those tools 2 1 SSD LINK CONFIGURATION TOOLS In order for SSD LINK modules to be configured and set up software tools Manager Setup And Monitor SAM and Configuration Editor ConfigE d from Eurotherm Drives are required The software tools use program specific hardware keys which must be plugged into the parallel printer port of the programming computer A hardware key for ConfigEd also allows the use of SAM a key for SAM alone will not allow the use of ConfigEd Manager is induded with both SAM and ConfigEd and will work with either key The software tools access the ssd_link database which contains both pre defined files libraries new module configurations function blocks etc and user created projects Project directories contain user created configurations and support files for each system being designed See Appendix A for details of the SSD LINK database and the individual tools manuals for infor
115. tON Sv sictisccnccnorsesinatsereteamecguaraccniidets 94 Grounding Issues Ba Grond LOGS cansercacnchacvpcosccarsscumetieee ites 95 E 2 Cross Coupled Grounds sccsisnssaccteaccavsescccessisacencacaivens 97 E 3 Use of a OV Busbar to Connect Power Supplies 99 SSD LINK Overview Eurotherm Drives SECTION 1 INTRODUCTION 1 1 WHAT IS SSD LINK SSD LINK is a distributed control system designed for the management and control of motor drives and associated equipment it is also well suited for process control and other operations SSD LINK is event driven in that an event taking place in one module on the network triggers the sending of a message to another module which then responds to the message in an appropriate manner All the modules in an SSD LINK system are connected by a high speed fiber optic cable network which eliminates most of the signal and control wiring present in a conventional system This network may be configured in different ways to suit specific needs see Section 7 for information on network topology Simplified SSD LINK System Module within System Fiber optic network Real Time Network RTN Processor Microprocessor with RAM and non volatile memory Operator station Fiber optic network Most modules in an SSD LINK system are software configurable and can perform a wide range of control and processing functions others are more specialized and constrained in their abilities Currently elements
116. tabase SSD LINK system hardware should be designed according to industry standard procedures and hardware drawings should be produced to allow the system to be built and documented 7 2 1 Generate Project A new project should be generated in accordance with instructions in the ConfigEd manual and when completed logged in to the Hub computer database This will ensure all projects can be referenced at the Hub database for future support All project data should be filled in correctly to ensure the correct information appears on the configuration drawing prints 7 2 2 Floppy Disks Two floppy disks should be generated one labeled the customer disk the second the backup disk The disks should be size 3 5 1 44MB and formatted for IBM PC SSD LINK Overview Eurotherm Drives 55 Each disk should be marked with the following information f Work order number f Customer name f Customer site location f ConfigEd project number and name found on the scratch pad window title bar when the project is selected 7 2 3 Configuration Design The total system configuration should be split up into convenient blocks for allocation to the various SSD LINK modules For multi drive systems the configuration should be split to allow standard blocks which can be easily duplicated Application spedfic function blocks should be used where possible When any configuration is installed into an SSD LINK module there must be at least two free pages of mo
117. ted modules processor operator station I O etc can be accomplished by giving the drive an address of 10 and then assigning addresses of between 11 and 19 to the other modules associated with that drive The next drive can be given an address of 20 and its associated components addresses of between 21 and 29 This pattern can be repeated throughout your system Remember that using smaller address numbers those lt 256 saves configuration space SSD LINK Overview Eurotherm Drives 35 6 1 6 2 Standard Module Names Each SSD LINK configuration must be given a valid DOS name of eight or fewer characters One example of a naming protocol is using the module type number followed by an underscore followed by the module address F or example 5207_11 would be an L5207 processor module with a module address of 11 Additional examples are shown in the following diagram Drive Drive Address 10 Address 20 Processor Processor Address 11 Address 21 Name 5207 21 5207_11 a Analog I O re Data flow LS direction nae 5102 14 Operator station Address 14 Address 12 9201_12 h Operator station Address 13 Other module naming schemes can be developed to suit the individual needs of the user e g using the application section name 6 1 7 Configuration Drawings Configuration drawings are produced through the graphical user interface of ConfigE d All the information to allow the system to be configured must reside in the dr
118. terface to a digital system it is good practice to ensure the analog input covers the full range of the input Always use as much of the 0 to 10V range as possible to maximize input resolution The following diagram shows where a 0 to 100 value derived from a low voltage input is required Software Analog I O multiplication 0 100 sO SSD LINK Analog signal signal 0 2V FSD Analog I O Analog multiplication O 0 100 Analog signal SSD LINK signal 0 2V FSD 5 0 The preferred treatment is to amplify the analog signal before connecting to the analog input If this is not done the resolution and accuracy of the analog input is degraded by the amount of software multiplication required The most common case for amplification is where load cells are required to be interfaced to the SSD LINK analog inputs Two load cell amplifiers are available from E urotherm Drives f 5530 for strain gauge SG type load cals f 5530 1 for LVDT type load cells 4 5 USING AN L5201 ANALOG MODULE FOR DIGITAL INPUT It is possible to use an analog input of an L5201 module as a digital input as shown in the illustration on the following page 20 SSD LINK Overview Eurotherm Drives Analog I O 10V ref Pull down resistor we protects input when switch is open OV busbar The 10k resistor will pull down the analog input to 0 when the switch is open When the switch is dosed the analog input will go to 10V 100 Inside the m
119. tion between SSD LINK modules through the fiber optic network is fixed at 2 7 megabaud If the computer being used is grounded through its power cord and the module through which it connects tothe SSD LINK system is also grounded a ground loop is formed and the SSD LINK Overview Eurotherm Drives 7 ground noise produced may disturb the RTNX communications link Both SAM and ConfigE d have built in retry mechanisms to deal with occasional electrical noise but this type of continuous noise will cause error messages and or extremely slow communications between the computer and the attached module In systems with a large amount of electrical noise e g systems containing inverters it may be necessary to break the ground loop to achieve usable communications Breaking the ground loop may be accomplished by f Installing a commercially available RS232 isolator module between the computer and the RTNX socket f Connecting the computer to the RTNX port of an ungrounded SSD LINK module e g an L5207 processor module connected to an ungrounded 24V power supply f Using a battery powered notebook computer rather than a plug in mode since most notebook computers are not grounded 8 SSD LINK Overview Eurotherm Drives SECTION 3 SSD LINK NETWORK The SSD LINK modules are interconnected using a high speed digital network with the following specifications f Fully distributed peer to peer communications f Upto 3 000 SSD LINK modules possible
120. to be adjusted will set the variable The various input and output slots are not shown in the diagram Note the use of a sender to ensure the potentiometer setpoint is updated correctly In fact the value sender will send its data to input slots in three different modules as shown The three potentiometer outputs are connected to the same input slot within module 35 Module addresses shown are arbitrary C 3 4 3 Potentiometer Scaling Gain Potentiometer function blocks must be scaled to allow the feedback variable to indicate the correct machine units The maximum SSD LINK variable is 1 00 When the potentiometer is configured it is scaled using the Gain parameter This parameter is the on display representation of 1 00 The total displayed number is referenced neglecting any decimal points The decimal point is set with the Format statement within the potentiometer e g if the full speed of a machine is 1000 feet per minute FPM this has to correspond to SSD LINK 1 00 Gain 1000 Format H F PM four digits no decimal place The minus sign in the format statement indicates that is displayed in the potentiometer feedback when a negative number is referenced If this is not present the minus sign will nat be displayed If the full speed 100 0 FPM Gain 1000 Format 4 F PM four digits one decimal place If the full range SSD LINK variable is not 1 00 this must be taken into account in the potentiometer gain term t
121. tories are shown as numbers 12345678 onwards which are created by the id dat file when a new project is started The id dat files are totally unique worldwide and are created at Eurotherm Drives when ConfigEd and or SAM are ordered The id dat contains the following information f Database D or name which appears in the SSD LINK tool scratch pad f Remaining project directory number range 70 SSD LINK Overview Eurotherm Drives When theid dat files arecreated the project range thenumevicl Ds availabletothat database which can be created is specified and stored in the id dat file If a database for SAM is ordered no project configuration work can be attempted so the supplied project range is empty In brief the id dat file assigns and tracks project numbers unique to its SSD LINK database Since no two projects ever have the same number projects may be moved between databases without risk of accidentally mixing the configurations up If the directories were named manually by the user the potential for conflicts and possibly dangerous results would be great If the entire project range is used up contact Eurotherm Drives for an updated id dat file A 3 1 Copying the SSD LINK Database WARNING The SSD LINK database must never be duplicated from one computer to another fthisisdone the id dat filewill beduplicated and project corruption will occur Eurotherm Drives will not accept any responsibility for project corruption
122. twork Drive Address 10 Processor Address 11 Desktop portable computer __CEModule List Analog I O NAME_AIO Analog Address 12 NAME_PRO Processor NAME_DRV Drive NAME_OPS Op Stn Data flow direction Yeti RS232 connection Operator Station Address 13 It is best not to connect the computer to an operator station since that connection will cause the operator station to enter its halt state at power up Using Install at Address in ConfigEd automates the selection of the target modules during installation See the ConfigEd manual for more information on installing configurations SSD LINK Overview Eurotherm Drives 53 SECTION 7 CONFIGURATION PROCEDURES This section gives recommended procedures on how SSD LINK configurations should be handled during the life of SSD LINK systems Following these procedures will help to ensure systems are properly commissioned and backed up and that no information is lost or corrupted 7 1 CONFIGURATION STORAGE AND SECURITY The following diagram shows the various computers and floppy disks that may be used for modifying and storing configurations in SSD LINK systems i SSD LINK system Customer Site y Customer disk enclosure RS232 aig nr ad i Project proj eee Local backup disk Site portable If required computer Customer SAM Project computer Communication via modem or backup disk Config files _ L Pe Database files Test Department computer if r
123. ub SSD LINK database contains the up to date configurations and the backup disk and the customer disk are available 7 7 1 Restoring Failed Modules If the service visit requires only the replacement of failed SSD LINK modules replace any failed module with the same or equivalent type and then restore the configurations using the customer s SAM database if necessary 7 7 2 Obtaining the Configurations To ensure the current configurations are used when modifying systems transfer the project configurations from the SSD LINK Hub database to the site computer The configurations may be transferred from the Hub database using the backup disk or through use of a modem 7 7 3 Changing the Configuration or Set Up This section applies if the configuration or set up is changed in any way during the course of the site visit Before any changes are made to the configuration via ConfigEd mark up the necessary modifications on the configuration block diagrams SAM can be used to change set up parameters within the modules ConfigEd must be used for all configuration changes Before modifying the configuration use the Update command within ConfigE d to update the affected configurations 7 7 4 Backing Up and Updating SSD LINK Overview Eurotherm Drives 59 If the configuration or set up is changed in any way perform the following steps f If SAM has been used to modify any set up parameters use the Update command within ConfigE d to update the a
124. uded only once Such a unit of code is known as a dass Classes exist in a hierarchy allowing subdasses to inherity the code and functionality present in the parent again with that code appearing only once in the module This saves configuration memory and makes the function block code easier to maintain SSD LINK Overview Eurotherm Drives 77 B 7 2 What is an Instance An instanceis a particular form of a class Instances hold the data associated with a unique and identifiable function block When a function block is executed the instance variables are used as inputs to the above class software The class software is executed to form the function block outputs which may be stored in the instance or sent out the output connections or both In essence an instance is a function block created and named by the user within ConfigE d B 7 3 What is Stored in the Module In brief there is only one class stored in EEPROM for each different type of function block and there is oneinstance stored for each function block The following diagram shows a typical dass with three instances of that class Class Input Class and p Subtractor Instance 1 Input Input 1 Input 2 Input 1 Input 2 Instance 2 d a Input 2 EEPROM Memory Input Instance 3 Input 78 SSD LINK Overview Eurotherm Drives APPENDIX C CONFIGURATION GUIDELINES This section gives some general guidelines in the useof SSD LINK Thesample configurations shown often re
125. unds to prevent ground loops and cross coupling as described in detail below 4 3 CABLE VOLTAGE DROP 24V MODULES Since currents on the order of 1 to 1 5A may be required for each unit it is recommend that you supply modules from power supplies local to the enclosure or desk thus avoiding long cable runs Driving modules over long power supply cables may cause problems related to voltage drop The following table shows the voltage drop per meter of typical stranded cable Cable Size Voltage Drop SWG Volts A m WARNING Under no circumstances should any line voltage supply be connected to any terminal on an SSD LINK systems module SSD LINK Overview Eurotherm Drives 19 Theuse of 24V and OV common busbars is recommended for the power supplies and the cables connecting the modules to the power supply should be kept short see Appendix E Thel O modules may be connected in a small chain providing the voltage drop is carefully monitored The supply range for most 24V SSD LINK modules is 20V to 28V Any voltage supply below 20V will cause module shutdown any voltage above 30V will damage the module In all cases refer to the relevant data sheet before connecting SSD LINK modules to power supplies Additional power supplies may be desirable for modules that are remotely mounted e g an operator station mounted on a panel some distance from the modules it is monitoring 4 4 SIGNAL ACCURACY AND ANALOG I O With an analog in
126. usetheBackup command f Using Manager export the project in read only form tothe customer disk and replace the customer disk in the enclosure 7 6 5 Before Leaving Site After performing the appropriate steps in Section 7 6 4 perform the following steps f Using Manager export the final commissioned and backed up project in read only form to the backup disk or local backup disk f Using Manager ensure the customer SAM database is up to date f Using Manager import the project from the customer disk to the customer s SAM database and replace the customer disk in the enclosure f Return project configurations to the project design engineer via backup disk local backup disk or a modem f Using Manager export the configurations tothe SSD LINK Hub database and ensure all module configurations are present At this point the write token may or may not be transferred to the Hub database see the Manager manual for more information f If the backup disk has not been used to transfer projects to the site portable computer use Manager to export the configurations in read only form to the backup disk and store the backup disk in a secure storage area f Ensure the configurations are up to date on the SSD LINK Hub database before using Manager to delete the project from the site computer 7 7 SERVICING SSD LINK SYSTEMS This section describes how the configurations should be handled during servicing of SSD LINK systems It is assumed the H
127. ween the digital module and drive should be designated fault freeV and suitable precautions taken to prevent damage The digital module should be configured to provide a slow speed setpoint to the drivein the event of failure In this example the slow speed setpoint is switched from a hardware switch connected to a single input of the digital module A sample digital module configuration is shown below Input slot Normal line setpoint Output slot To extruder drive setpoint input Extruder start and run at low speed The drive setpoint must be disconnected from the normal line setpoint using the switch shown Note the use of senders to ensure the start and setpoint are updated correctly A ramp not shown may be required Some logic will also be required to start and stop the drive in response to the digital input It is important the above digital module be prevented from shutting down during SSD LINK network failure conditions This can be done by disabling the Restart On Network Fail option in the system control function block in the module configuration file The drive should be configured to Do nothingY when an SSD LINK network fail occurs 5 L3 Active Low Inputs and Safety The L5202 digital O module operates as an active low device If an input is connected to OV that input is activated SSD LINK Overview Eurotherm Drives 29 INCORRECT ACTIVE LOW WIRING Short activates the t digital input Machine SSD LINK Frame mo
128. wn in the following diagram Sample rate defined Trigger input by analog input Disconnect Switch DERIVATIVE Output FEEDBACK SELECT INTEGRAL ENABLE INTEGRAL NEG FB LIMIT Execute PID PG LIMIT Retains last value or PID ENABLE Disable PID POS FB LIMIT PROPORTIONAL Setpoint SETPOINT until block is triggered When this switch is dosed input events are passed to the output When open no events can pass through to the PID trigger input This allows the trigger event chain to be broken The switch is opened and dosed using a logic input A typical application is one in which it is required to prevent execution of a complex function block chain This could save large amounts of processing time 46 SSD LINK Overview Eurotherm Drives 6 4 5 SSD LINK Inputs to a Module Configuration When a module is required to receive data over the SSD LINK network from other modules input slots are required to receive this data The input slots are specified with a slot number unique within each module s configuration during configuration There are two types of input slots which can be specified from ConfigE d normal and priority 6 4 5 1 Normal Input Slots Normal input slots are the standard input slots They should be used for almost all data inputs from the SSD LINK network to the configuration When a message is received toa normal input slot an event is generated which is placed on the event queue in the manner described in earlier secti
129. y the displayed full range of the metered input variable and the overload lines The full range value in percent of the input variable should be entered into the Display Max and Display Min parameters 86 SSD LINK Overview Eurotherm Drives The overload lines are set such that the values of Display M ax and Display Min are used as full range deflection for these lines When the analog arrows exceed the Display Max or Display Min line values the arrows turn white Display min Display max Speed Feedback 48 4 DIGITAL FEEDBACK ANALOG DISPLAY For the example above when the full range feedback for a reversing drive setpoint is 83 333 the Display Max and Display Min are set to 83 333 If the overload speed was 50 of drive full speed the Max and Min values would be Min and Max See 41 666 If the drive was not reversing the Display Min would be zero C 3 46 Pot Meter Function Block The PotM eter function block combines the functionality of separate potentiometer and meter blocks into one display band There are two display modes potentiometer mode and meter mode selected by touching the PotM eter display The Pot Meter has two feedback inputs f Setpoint for the potentiometer function f Measured value for the meter function In potentiometer mode the digital display indicates the potentiometer setpoint In meter mode the digital display indicates the measured value and the analog display indicates the setpoint

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