general foundation series 302 of field devices
Contents
1. 7 e k k lolo lolo bold elo ET EN ES g yy r 1900m 1900m 1900m 1900m Figure 1 19 Repeater Connection Conventional Power Supply Fieldbus 4 20 mA Devices Figure 1 20 IF302 Connection Conventional Power Supply Fieldbus 4 20 mA Devices Figure 1 21 FI302 Connection Installation Attaching Devices to the fieldbus Fieldbus devices may be attached to and removed from an operating fieldbus When removing a device ensure that fieldbus wires are not short circuited or come in contact with other wires shield or ground Fieldbus devices with different communication speeds cannot be mixed on the same network Bus powered and non bus powered devices may be mixed and matched on the same network Do not connect non fieldbus devices to the network Analogue type indicators with a coil etc may adversely affect communication High impedance DVMs may be used for troubleshooting etc Attachment Procedure When the device is received unpack it and connect it stand alone or into your fieldbus network to a computer with SYSCON e g a configurator station e Assign the tag to the device using the SYSCON The Assig Tag menu can be found at device and bridge devices menu e Bring2. Figure 1 25 Interface Connection 1 21 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Interface Addressing The PCI card has a network address like all devices No two devices on the network must have the same address This of course applies to PCI too 5 A ERA JE NODE 16 NODE 17 NODE 18 NODE 19 Figure 1 26 Interface Addressing Interface Configuration See the PCI Process Control Interface User s Manual Installation Basic Troubleshooting 0 Communication errors are automatically detected and indicated in operator console and engineering tools As for all troubleshooting removing parts one by one until it works finding the fault through elimination is a useful way It is also a good idea to test a problem device on its own on the workbench Make sure If there is no communication at all there is a problem with its configuration or installation Correct polarity Correct tag and address Integrity of the fieldbus network Supply voltage is sufficient min 9 5 V even during communication NOTE Advanced Troublesh
3. PSI302 3 0 Pawer Supply Impedance Figure 1 16 Spur Length and Terminator Placement Recommended Maximum Spur Length Total 1 per spur 2 per spur 3 per spur 4 per spur 25 32 im 1m im im 19 24 30m 1m im im 15 18 60 m 30 m im im 13 14 90m 60 m 30 m im 1 12 120 m 90 m 60 m 30 m Table 1 3 Devices per spur vs spur length These lengths are rules of thumb Longer is very often possible Spur Precautions It is important to pay attention to spur length when star topology is used since the spurs in this case is often quite long in comparison with bus topology If the distance between the PSI302 and the PCI is more than 120 m maximum spur length then the internal terminator in the PSI302 cannot be used and a separate BT302 should instead be used Polarity Some devices have polarity others don t It is important to ensure correct polarity for devices with polarity In a fieldbus system all devices are connected in parallel i e all negative terminals together and all positive terminals together Use of color coded wires is recommended to distinguish positive from negative Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Interface and Bridge An interface is used to connect a computer to the fieldbus There are two types e Permanent installation e Temporary connection
4. IN FIELDBU PIIRSI MAI 99 FOUNDATION oD e ATA INSTALLATION OPERATION AND MAINTENANCE MANUAL FOUNDATION SERIES 302 OF FIELD DEVICES oh T d A a GERAL FFME smar BRAZIL Smar Equipamentos Ind Ltda Rua Dr Antonio Furlan J r 1028 Sert ozinho SP 14170 480 Tel 55 16 645 6455 Fax 55 16 645 6450 e mail smarinfo smar com GERMANY Smar GmbH Rheingaustrasse 9 55545 Bad Kreuznach Germany Tel 49 671 794680 Fax 49 671 7946829 e mail infoservice smar de USA S mar International Corporation 6001 Stonington Street Suite 100 Houston TX 77040 Tel 1 713 849 2021 Fax 1 713 849 2022 e mail sales smar com ARGENTINA Smar Argentina Soldado de La Independencia 1259 1429 Capital Federal Argentina Telefax 00 5411 4776 1300 3131 e mail smarinfo smarperifericos com MEXICO Smar M xico Cerro de las Campanas 3 desp 119 Col San Andr s Atenco Tlalnepantla Edo Del M x C P 54040 Tel 53 78 46 00 al 02 Fax 53 78 46 03 e mail ventas smar com Smar Laboratories Corporation 10960 Millridge North Suite 107 Houston TX 77070 Tel 1 281 807 1501 Fax 1 281 807 1506 e mail smarlabs swbell net web www smar com e mail smarinfo smar com Specifications and information are subject to change without notice CHINA Smar China Corp 3 Baishigiao Road Suite 30233 Beijing 100873 P R C
5. The terminator should be placed at each end of the trunk The power supply impedance PSI302 has one of the terminators built in In bus topology the end of the trunk is easy to see In tree topology the end of the trunk is where the spurs branch out There may never be more than two terminators and the terminators must not be forgotten The bus may function with only one terminator but performance may be degraded PSI302 Power Supply Impedance Allows use of standard power supplies 18 2 V 300 mA output Built in terminator DIN rail or panel mount Fail indication A power supply impedance module shall be connected between the fieldbus and the power supply Prevents short circuit of communication signal by the power supply The power supply impedance also regulates the power supply voltage lf a normal power supply is connected directly to the fieldbus the communication will be short circuited the power supply impedance prevents this The power supply impedance has built functionality for automatic and bumpless switch over from a main to a backup in redundant configuration should the main unit not provide power Connect maximum 4 channels per PSI302 per PS302 PSI302 oN CHANNELS e KO CH Cl SR Figure 1 11 PSI302 Connection O AC Short Circuit Prevention A DC power supply acts as a short on a AC circuit T
6. Figure 3 6 The Settings of Transducer Display parameters II parameters II Programming Using Local Adjustment The device must be fitted with the digital display for this function to be enabled The device has two holes for magnetic switches activated by the magnetic tool located under the identification Plate See Figure 3 7 Local Adjustment Switches Y Magnetic Tool e Zero Hole Span Hole Figure 3 7 Local Adjustment Switches This magnetic tool enables adjustment and monitoring of the most important parameters of the blocks The jumper labeled Loc Adj on top of the main circuit board must be in place to on position for this function to be enabled and the device must be fitted with the digital display for access to the local adjustment Local Adjustment Methodology Enter the local adjustment by inserting the magnetic tool in the ZERO hole Entry has been gained into the one level menu Leaving the tool in the ZERO hole browse through the items in the menu The ZERO hole is used for browsing By moving the tool to the SPAN hole the parameter can be set to other value 3 5 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual SUMMARY Zero z Browses Span s Selects Enters To browse the available options for parameters move the tool to the ZERO hole to go to the specific menu option See Figure 3 7 Local Adjustment Switches Then make a selectio
7. A bridge is used to pass data between networks Bridge Connection Data may be passed between devices on different channels on the same PCI card or even between different PCI cards Figure 1 17 Bridge Connection Installation Intrinsic Safety Connection Intrinsic Safety Several SB302 may be connected to each channel such that 16 or more devices per safe area channel is possible while there are only 4 device per hazardous area segment Special considerations for fieldbus installations in hazardous areas All the normal intrinsic safety limitations apply Refer to requirements from regulatory agencies Voltage Current Power Capacitance Inductance This in turn means a limited amount of devices and a limited cable length Special fieldbus safety barriers or galvanic isolators are required Any conventional barrier or barrier for other networks cannot be used HAZARDOUS 4 Figure 1 18 1 S Connection Foundation H Fieldbus Series 302 I
8. for use within the same device or by other one in the application process Using them the user may easily build and overview complex control strategies Another advantage can be seen as extending flexibility considering that the control strategy may be edited without having to re wire or change any hardware Each field device has a set of blocks likes Analog Input PID Control Selector etc eliminating the need for a separate control devices The communication requirement is considerably reduced and that means less dead time and tighter control is achieved not to mention the reduction in cost Other function blocks are also available They allow flexibility in control strategy implementation and guarantee interoperability together of Device Description The need for implementation of fieldbus in small as well as large systems was considered when developing the Series 302 of fieldbus devices They have a common feature of being able to act as a master on the network and be configured locally using a magnetic tool eliminating the need for a configurator or console in very basic applications Get the best results of the Foundation Fieldbus Series 302 by carefully reading these instructions 1 Users of SMAR CD600 multi loop digital controller should be familiar with this since it was implemented several years ago 2 For more details Please look at Function Blocks Instruction Manual Foundation H Fieldbus Series 302 Installati
9. shield should be grounded never the fieldbus wires The shield should be grounded in only one point The shield of the spurs shall be connected to the shield of the trunk In high EMI RFI environments several additional RF grounds of the shield may be done using capacitors though this is rare Do not use the shield as a conductor The shield should be grounded at the negative terminal of the power supply Shield Junction Box PSI302 EN lo FS DOC Trunk and spur shield joined together Figure 1 15 Grounding the Shield Installation Spur Length PSI302 3 0 Power Supply Impedance a ron Remember that in tree like topologies the branches are actually spurs Spur length is basically independent of cable type as long as the maximum total length is not exceeded but depends on the number of devices connected to the spur There should never be more than four devices per spur No special connectors are required to connect the spur to the trunk Spurs should be used to connect devices to the trunk so that one device may be removed without disturbing the other
10. 18 0 DAMP 0 01 2 Action Mnemonic TRANSDUCER BLOCK LD302 17 2 LOWER 0 01 Action Mnemonic TRANSDUCER BLOCK LD302 ml lance Ed t Close Help Figure 3 3 The Settings of Transducer Display parameters This default values indicates that a parameter index 14 and sub index 2 of the Transducer Block LD302 is configured as Monitoring The parameter will appear as P_VAL on the LCD display The index 14 means the Output of transducer block It is a variable called type DS 64 it means status float value The sub index sets the member associated to the record parameter For exemplo The 1 selects the status and 2 selects the value When a parameter is a float point this sub index number does not cause any effect on the LCD display The selection of display parameters should be seen as function block configuration The user should determine and configure for each parameter selected the settings described in the table below 3 3 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual BLOCK TAG RELATIVE INDEX SUB INDEX MNEMONIC FLOAT INC_DEC DECIMAL POINT ACCESS ALPHA_NUM Tag assigned to the Function Blocks Relative Index of the parameter in the object dictionary The logical sub address of the member Mnemonic name representing each parameter Step for Incrementing or decrementing in float or integer format Number of de
11. Device needs minimum 9 V Maximum voltage drop is 7 V Maximum total current draw is 83 mA Each device needs 15 mA Maximum 5 devices or shorter cable Installation Device Quantity Terminal Blocks Junction box Rules of thumb 32 separately powered or 12 bus powered plus an interface 4 per safety barrier in hazardous area one fieldbus network may have many barriers More or less devices may be possible depending on wire size and length power consumption and barrier rating Using repeaters more devices are theoretically possible 224 though there is a penalty on control cycle time and display update No special terminal blocks are required and no special couplers are required to join spurs to trunk Keep it inside a junction box Terminal Terminator Block Terminator Figure 1 10 Terminal Blocks The terminator has two major functions e Signal current shunt The communication signal is transmitted as a current but received as a voltage the terminator does the conversion e Prevent signal reflection The communication signal bounces back when it reaches the end of the wire potentially distorting itself The terminator prevents that There are actually two terminators in a fiel
12. L Typical cable values e L R 25 uH ohm e C 200 nF km d lt lt 1Km AREA Ver Figure 1 14 Cable Entity Parameters Normally the capacitance is the limiting factor for cable length in a fieldbus network A 1 9 km cable would contribute 380 nF more than a barrier can handle Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual NOTE Mixing Cable Types To check if a combination of cable types is within the specification the below equation may be used L1 L1max L2 L2max lt 1 Where L1 is length of cable type 1 O L2 is length of cable type 2 L1max is the maximum length for cable type 1 L2max is the maximum length for cable type 2 Example L1 1000 m of cable type A L2 100 m of cable type B 1000 1900 100 1200 0 61 Which is acceptable since 0 61 lt 1 Cable Shield Shield is preferred to achieve best performance Shield should cover minimum 90 of the cable length If there is no shielding the cable should be within a metal conduit which act as a shield Grounding Only the
13. L BLOCK 1 7 FIGURE 1 11 PSI302 CONNECTION 1 8 FIGURE 1 12 REDUNDANT POWER 1 9 FIGURE 1 13 TOTAL CABLE LENGHT ee ees rece cna ege cach ile Seas aah atv ee eege Ek 1 10 FIGURE 1 14 CABLE ENTITVPBARAMETERG nino nrrnnnnnnnnnnnnnss 1 11 FIGURE 1 15 GROUNDING THE SHIELD ooooocccnoccccnoocnconnnnonononcnnnnnonononnnnnnnnnnnnnnnnnnnnnnnnnnnrannnrnrnnnnnnnannnss 1 12 FIGURE 1 16 SPUR LENGHT AND TERMINATOR PLACEMENT 1 13 FIGURE 1 17 BRIDGE CONNECTION 1 14 FIGURE 1218 Ss CONNECTION a e ages Seet eigene Eege Dee Eege ee gd 1 15 FIGURE 1 19 REPEATER CONNECTION cooccccooccccononcncnnnnnononnnennnnnononnnnnnononnnnnnrnnnnnnrnnnnnnnannnrnrnnnnnaninnnnss 1 18 FIGURE 1 20 IF302 CONNECTION 1 18 FIGURE 1 21 FI302 CONNECTION 1 18 FIGURE T22 CONNECTION ccc Bees te Die to eo 1 20 FIGURE 1 23 1F302 IN I S INSTALLATION o oooocccccoocccononnnonononcnnnnnnnoncnnnnnoninnncn none nnnnnnnn nn ran nrnrnnnnraninnnns 1 20 FIGURE 1 24 FI302 IN I S INSTALLATION cccccceeseceeeeneeeeeenceeeeseneeeseeaeeesseeeesesneeesseaeeeessnneeeseaees 1 21 FIGURE 1 25 INTERFACE CONNECTION 1 21 FIGURE 1 26 INTERFACE ADDRESSING cccccccceeeseeceeeeceeeeeeeeeesenececeneeeecaeeeeseaeeeseeaeeessneeessenees 1 22 FIGURE 2 1 TYPICAL NORMAL DISPLAY SHOWING PV IN THIS CASE b Oe 2 2 FIGURE 2 2 DOD DISPLAY EE 2 2 FIGURE 3 1 FUNCTION AND TRANDUCERS BLOCKS ccsee
14. RANSDUCER DISPLAY PARAMETERS AAA 3 4 TABLE 4 1 DIAGNOSTIC OF THE FIELD DEMICESR ee eee cece tee tree tent nn nro cnn cn nanr cnn cnn nnnnnns 4 1 Introduction Introduction This manual introduces the series 302 of Fieldbus Foundation devices They are LD302 FOUNDATION Fieldbus Pressure Transmitter TT302 FOUNDATION Fieldbus Temperature Transmitter IF302 FOUNDATION Fieldbus Triple Channel Current to Fieldbus Converter FI302 FOUNDATION Fieldbus Triple Channel Fieldbus to Current Converter FP302 FOUNDATION Fieldbus to Pressure Converter and FY302 FOUNDATION Fieldbus Positioner They are based on a field proven technology that provides reliable operation and high performance The digital technology used in the Series 302 enables the choice of several types of function blocks An easy interface between the field and the control room and several interesting features that considerably reduce the installation operation and maintenance costs and will develop new ways to improve plant performance plant safety and plant availability Fieldbus is not only a replacement for 4 20 mA or intelligent device protocols it contains much more Fieldbus is a complete network system enabling migration and distribution of the control functions to field devices and vastly expands the amount of process and non process information flowing both from and to field devices Some of the advantages of bi directional digital com
15. Tel 86 10 6849 8643 Fax 86 10 6894 0898 e mail info smar com cn SINGAPORE Smar Singapore Pte Ltd 315 Outram Road 06 07 Tan Boon Liat Building Singapore 169074 Tel 65 6324 0182 Fax 65 6324 0183 e mail info smar com sg Smar Research Corporation 4250 Veterans Memorial Hwy Suite 156 Holbrook NY 11741 Tel 1 631 737 3111 Fax 1 631 737 3892 e mail sales smarresearch com FRANCE Smar France S A R L 42 rue du Pav des Gardes F 92370 Chaville Tel 33 1 41 15 0220 Fax 33 1 41 15 0219 e mail smar am wanadoo fr MIDDLE EAST Smar Middle East Al Sadaka Tower Suite 204 P O Box 268 Abu Dhabi Tel 9712 6763163 6760500 Fax 9712 6762923 e mail smar emirates net ae Index Table of Contents INDEX OF FIGURES iia ta IV INDEX OF TABLES cocinada Gandini IV INTRODUCTION css dit tas Vv INSTALLATI O N genge are tania oi a dis 1 1 NETWORK WIRING cccoviciritoasinail ij tt tl A ate dai E 1 1 PHYSICAL SIGNALING 2 testen lidia rece A Re Cage ide a le le EEN 1 2 TOPOLOGIES 2 tts che eis he ee aos 1 2 BUS TOPOLOGY ebessi eise ii ico o e 1 2 TREE TOPOLOGY Y uva UA el en iy hee 1 2 DAISY GHAIN TOPOLOGY cincusio cana trepidante 1 5 POINT TO POINT TOPOLOGY coc coord SEA eae 1 6 FIELDBUS NETWORK COMPONENTS ccccccccccccoconoccnnonnonnnonn cnn cnn cnn cnn cnn 1 6 POWER SUPPLY gt ci o ti ai iaa 1 6 DEVICE QUANTITY ostia ra Alb even peter ET 1 7 TERMINAL BLOCKS titi Med te nee Bi
16. below the LD302 has four blocks instantiated created as block per user The Analog Input block the Display and Transducer blocks and Resource Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual PY Syscon Id Fieldbus1 Tel 2 Project File Edit Communication Window Help lej x Me xede Se lso RES The device was instantiated as LD302 VFD1 IS VFD2 Al_BLK Analog Input RES_BLK Resource Block __ As you can see the d TRD_BLK Transducer Transducer and Display are DSP_BLK Display treated as special type of Function Blocks called Transducer Blocks Here you can see all blocks instantiated A A VS Figure 3 1 Function and Transducers Blocks On Line LD302 F 3605 Display DSP_BLK A group of parameters aero A olaaa Seda Te E certain parameter by siete EE BLOCK_TAG_PARAM_1 interface what the parameter is recognized The relative index of the i e S parameter selected DECIMAL_POINT_NUMBER_1 ACCESS_1 This mnemonic appears Mnemonic on the LDC Display Al BLOCK 18 Monitoring or Acting 0 on its parameter DAMP 0 01 2 Action Mnemonic e gt cancel Edit Close Help Figure 3 2 Transducer Display Configuration Configuration The transducer display is treated as a common function block It means its block can be confi
17. bus Series 302 Installation Operation and Maintenance Manual Point to Point Topology Only two devices connected to each other This topology does not take advantage of the multidrop capability of fieldbus Typically used only on workbench with device and notebook computer Terminator Terminator OJO Figure 1 9 Point to Point Topology Fieldbus Network Components Power Supply Cable Media Field devices Transmitters Valve positioners Converters Programmable controllers Interfaces Operator stations Hand held terminals Terminator Power supply impedance and power supply Intrinsic safety barriers Galvanic Isolators Bus analyzer The power consumption varies from one device to another There are no upper or lower limits The power consumption is indicated on device The lower consumption a device has the better especially in intrinsic safety applications It is important that the wire resistance is not too high making the supply voltage at the device too low Good connections and junctions must be made to keep resistance low It is possible to test the voltage not signal on the installed network using a hand held Digital voltmeter DVM Power Supply Example PSI302 output voltage is 16 V worst case Cable resistance for 1 9 km is 84 ohm
18. ces per safety barrier by intrinsically safe restrictions One fieldbus network may have many barriers Bus Powered Field device takes power from the bus Non Bus Powered Field devices gets power over separate wires 7 CEUC CC Figure 1 3 Wire Media A Smar fieldbus System consists of several fieldbus networks A fieldbus network may consist of several segments Several fieldbus devices may be connected to each segment 1 2 Installation 2 CHANNELS Network olol Ls ES TO ei 24V o EA Segment Topologies Figure 1 4 Fieldbus Network Almost any topology is possible It is mainly a matter of where the terminator is connected e Bus e Tree Chicken foot e Daisy chain e Point to point As far as fieldbus is concerned that are all alike what matters is the placement of the terminator Of course combinations of two or more topologies is possible Ring topology is not possible Because connecting the bus in a ring damage the Termination scheme 1 3 Foundation H Fieldbus Series 302 Installation Opera
19. cimal places after mantissa Read or and Write permission Select mnemonic or value in alphanumeric display when the value is higher than 10 000 REFRESH Flag assigned to indicate new configuration Table 3 2 Transducer Display Parameters On Line LD302 F 3605 Display DSP_BLK lt gt lo ee een e E 0 25 2 Monitoring These settings Mnemonic are necessary to UCER BLOCK LD302 configure one parameter to be shown on LCD PRESS_LIN_NORMAL display 0 25 2 Monitoring Mnemonic None After the download operation at first time the display Ne block will set all the 2 block tag P_VAL parameters with 0 25 default values 2 Monitoring Mnemonic Al BLOCK 18 0 DAMP 0 01 2 Action Mnemonic ya D Cancel Edit Close Help Figure 3 5 The Settings of Transducer Display parameters II 3 4 Configuration On Line LD302 F 3605 Display DSP_BLK lt gt leee le Te E i NC_DEC_6 DECIMAL_POINT_NUMBER_ ACCESS_ ALPHA_NUM_ LAY_REFRESH EJ BLOCK_ALM 0 25 2 Monitoring Mnemonic TRANSDUCER BLOCK LD302 31 2 PRESS_LIN_NORMAL 0 25 2 Monitoring Mnemonic Update Display Each time when you modify the settings of Display Block you should update your settings choosing Update Display The operation of configurating the Display can be done On_Line or Off_line by SYSCON gt Cancel Edit Close Help
20. d value For undershoot the opposite applies To exit from any menu remove the tool from any hole and for time out that an escape sequence will return back to normal display After selection inserting the tool in SPAN when configuring a parameter with options the menus will automatically go to the option branch be entered If the tool is kept from the ZERO and SPAN hole for a few seconds the display will return to normal This may also be used as a way to intentionally return to normal display without having to wait to the escape time out Most of what is entered with the local adjustment is stored in a nonvolatile EEPROM to be saved in case of power failure When parameters with options are selected these are automatically stored in this EEPROM After the power failure the stored value will be used The Local Adjustment interface was defined to be an easy Human machine interface One position always moves on menus and the other acts on parameters changing their values or status The local adjustment can be totally configured by SYSCON The user can define the parameters to be adjusted or monitored locally Usually those parameters are output and input from control function blocks Also it is possible to change mode and set tuning parameters By inserting the magnetic tool in the ZERO hole the user can navigate on the menu and by inserting the tool in the Span hole the actions can be done Scrolls the display items until the variable
21. dbus network one in each end However one of them is typically built into the power supply impedance or safety barrier Terminator shunt The low speed wire media fieldbus signal is transmitted as an AC current with amplitude of 10 20 mA Each of the two terminators has impedance of 100 ohm and since they are connected in parallel the network will have resulting impedance of 50 ohm The terminator will cause a voltage drop as the transmitted current passes through A voltage with amplitude of 250 500 mV will therefore be seen over the network The receivers in all the other fieldbus devices sense this voltage Terminator end When the fieldbus signal traveling down the wire reaches the end it is faced with a change in impedance from the characteristic impedance of the wire to the infinite impedance of open air This will cause a part of the signal power to be reflected back up through the wire The reflected signal interferes with the oncoming real signal If the reflected signal is powerful enough it may distort the real signal such that the communication does not work The terminator has the same impedance as the cable such that when placed at the end the fieldbus signal sees no change in impedance and hence there is no reflection It is also clear that the terminator must be at the end of the wire to really work 1 7 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Terminator Placement
22. ecceeeeeeeeeeeeeeeeceeeecseeeeesseeeessneeeeseness 3 2 FIGURE 3 2 TRANSDUCER DISPLAY CONPIGUDATION oooocccccnoncncononcncnnnncnconnnnnnonnnnnnnnnnonennnnnninnnneos 3 2 FIGURE 3 3 THE SETINGS OF TRANDUCER DISPLAY PARAMETERS cccooocccccnonccconnncncnnnnnncnnnnnnnnnnnos 3 3 FIGURE 3 4 THE SETINGS OF TRANDUCER DISPLAY PARAMETERS l 2 ccsssceeeeeeeeeesneeeeeeees 3 4 FIGURE 3 5 THE SETINGS OF TRANDUCER DISPLAY PARAMETERS ll cc ssceeeesereeeeeeeeeeseees 3 4 FIGURE 3 6 THE SETINGS OF TRANDUCER DISPLAY PARAMETERS ccsseceeeeseeeeeeneereeees 3 5 FIGURE 3 7 LOCAL ADJUSTMENT SWITCHES cocooooccccoooccncnnonnonnnnonononnnnnnnnnnnnnnnnnnnnncnnnnnn name nnnrrnnnnnnnnnnnes 3 5 FIGURE 3 8 BROWSING GENERIC PARAMETER coooocccocooccnonooncnnnnnncnnonnnnnnnnnnnnnnnnnnnncnnnnnnnnnnnnnrnnnnraninnnnos 3 6 FIGURE 3 9 ACTING A GENERIC VALUE cccccccecccceeeeceeeeeneeeeeeeceeeecneeeseeeeeeseaeeeeceneeessseeeessneesenaess 3 6 Index of Tables TABLE 11 CABLE OPTION Sito es ida dd 1 10 TABLE 1 2 TOTAL CABLE LENGHT EXAMPLE cococccocccoccnonconcnonnnononononnonnnnnn cnn cnn cnn 1 11 TABLE 1 3 DEVICES PER SPUR VS SPUR LENGHT A 1 13 TABLE 1 4 TEMPERATURE CLASSIFICATIONS c cooococcccccccoconoconononnnnana nana nannnn can nnnrnnnrnnrnnnrnnrnrrnnn 1 16 TABLE 2 DISPLAY MESSAGES cuca tai 2 3 TABLE 3 1 PARAMETER FUNCTION AND CLASS DEFAULT OF DEVICE 0 0 ee ee eee 3 3 TABLE 3 2 T
23. efined as guide line to help the user to make common tasks The SYSCON identifies each method associated to the parameters and enables the interface to it The channel number which references a channel value which is sent via internal manufacturer specific to function block It starts at 1 until the number of variables available per each transducer It is a specific method to make the calibration operation It is necessary to match the source of reference applied to or connected to the device with the wished value At least four parameters should be used to configure this process CAL POINT HL CAL_POINT_LO CAL_MIN_SPAN and CAL_UNIT Those parameters define the highest and lowest calibrated values for this device the minimum allowable span value for calibration if necessary and the engineering unit selected for calibration purposes when its is different by SENSOR_RANGE or FINAL_VALUE_RANGE Section 4 Maintenance Procedures General SMAR Series 302 devices are extensively tested and inspected before delivery to the end user Nevertheless during their design and development consideration was given to the possibility of repairs being made by the end user if necessary In general it is recommended that end users do not try to repair printed circuit boards Spare circuit boards may be ordered from SMAR whenever necessary Refer to the item Returning Materials at the end of this Section Since the transducer block is intimately a
24. emperature compensation control and exchange data to hardware How to Configure a Transducer Block Each time when you select a field device on SYSCON by instantiating on the Operation menu automatically you instantiate one transducer block and it appears on screen The icon indicates that one transducer block has been created and by clicking twice on the icon you can access it 3 7 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Channels Calibration The transducer block has an algorithm a set of contained parameters and a channel connecting it to a function block The algorithm describes the behavior of the transducer as a data transfer function between the I O hardware and other function block The set of contained parameters it means you are not able to link them to other blocks and publish the link via communication defines the user interface to the transducer block They can be divided into Standard and Manufacturer Specific The standard parameters will be present for such class of device as pressure temperature actuator etc whatever is the manufacturer Oppositely the manufacturers specific ones are defined only for its manufacturer As common manufacturer specific parameters we have calibration settings material information linearization curve etc When you perform a standard routine as a calibration you are conducted step by step by a method The method is generally d
25. en eS EE 1 7 TERMINATOR cuota tail ode serge Serben Eege eege Ee gd et 1 7 TERMINATOR PLACEMENT orcii ineaca naa aaa i iii 1 8 PSI302 POWER SUPPLY IMPEDANCE c ooocccccoccccccconcnnnnancnnnnnnnonn nano cnn cnn n cnn cnn nnnr cnn cnn cren eraasi RAEES 1 8 REDUNDANT POWER uge aerer ei o 1 9 BI302 TERMINATOR eegen 3 tee abe aE pdas cdta 1 9 P5302 POWER SUPPLY tege eegent deed Egeter 1 9 A scecestasied E a aa a teateset elicits agate a a wesateeh eas Sad 1 9 CABLE OPTIONS EE 1 10 LOTAL CABEE LENGH Tits tai ee nas atasca 1 10 SPUR LENGHT iiron s a a ege lege Eege 1 13 RECOMMENDED MAXIMUM SPUR LENGHT c occciccccccnocononcnncnonnnonononono nono cnn cnn nn arc n anna nana cnnnnnnnnnn nn 1 13 INTERFACE AND BRIDGE iea aae ea araa SEENEN 1 14 BRIDGE CONNECTION EE welche a E a a E E S scanned 1 14 INTRINSIC SAFETY CONNECTION 1 15 INTRINSIC SAFETY iinr e i ov eet Ee rd 1 15 ATTACHING DEVICES TO THE FIELDBUS 00 eects eee eter tear tees tees pape eriek iaaea a siati nn 1 19 WIRING DOS AND DONT aao ea e aea E a E GTE 1 29 INTRINSIC SAFETY GALVANIC ISOLATOR A 1 20 COMPUTER INSTALLATION tooo cota tido bits a ee ee 1 21 INTERFACE CONNECTION concisa isidro ia 1 21 INTERFAGE ADDRESINO aaa e e te 1 22 INTERFACE CONFIGURATION edd EES os ote eee niin dE ee EE ee 1 22 BASIC TROUBLESHOOTING egene ee eeh EE dee a ee ete 1 23 OPERATION isso 2 1 THE ECD DISPLA eii ica 2 1 NORMAL DISPLAY OPERATION ennienni e ee ee ee E en da 2 2 CONFIGURATION sais naia a
26. fety earth like a barrier Functions as a repeater allowing several hazardous areas segment to be connected to the safe area segment of a network Shield Junction Box PSI302 E a E oN o x FAMA FAIL ee ras Trunk and spur shield joined together Figure 1 22 Connection Power Supply LS Barrier Fiel ieldbus 4 20 mA Devices Figure 1 23 IF302 in I S Installation 1 20 Installation Power Supply LS Barrier Fieldbus 4 20 mA Devices Figure 1 24 FI302 in I S Installation Computer Installation PCI Internal fieldbus Interface Four fieldbus channels Up to eight per station Galvanically isolated Plugs into ISA slot Up to four redundant cards stations in parallel Non volatile memory Runs independently from computer Interface Connection Up to four redundant operators on the same fieldbus network Computer must be off when cards are inserted or removed 6 Sa NODE 16 NODE 17 NODE 18 NODE 19
27. gured by SYSCON setting parameters by choosing values according to customer s needs The LCD display can be used for monitoring or acting purpose a parameter present on the fieldbus network or inside a function block can be shown at LCD or be acted as for example Calibration and Tuning parameters Local Programming Tree The programming tree is a one level shaped menu system allowing configuration of the most important items The menu itself can be configured like a transducer block by SYSCON or other configurator in order to select and optimize the access to functions Each field device leaves the factory with a default configuration There are different defaults configuration for each type of field device but normally its includes Tag and Output transducer block as parameter for monitoring parameters for calibration purpose as you can see in the table below PARAMETER FUNCTION CLASS TAG MONITORING READ TRANSDUCER OUTPUT MONITORING READ LOWER CALIBRATION READWRITE UPPER CALIBRATION READWRITE Table 3 1 Parameter Function and Class Default of Device Display Configuration using SYSCON On Line LD302 F 3605 Display DSP_BLK i BLOCK_TAG_PARAM_1 NDEX_RELATIVE_1 UB_INDEX_1 LOCK_TAG_PARAM_2 NDEX_RELATIVE_2 UB_INDEX_2 LOCK_TAG_PARAM_3 NDEX_RELATIVE_3 UB_INDEX_3 LINE DEL 3 DECIMAL_POINT_NUMBER_3 2 ACCESS_3 i ALPHA_NUM_3 i BLOCK_TAG_PARAM_4 P_VAL 0 25 2 Monitoring Mnemonic Al BLOCK
28. herefore the power supply impedance is introduced The impedance acts as a 3kQ impedance between field Installation Redundant Power Automatic bumpless switchover between redundant power supplies Only one PSI302 should have the terminator connected or a separate power supply end terminator is used ee el a PSI302 ols a yen le AABT or l a pie K ep Gw We o HO KI S smar CM J Gees EH Se E OO TT El PSI302 H Y Figure 1 12 Redundant Power BT302 Terminator Intrinsically safe equivalent unprotected capacitance PS302 Power Supply e Wide input range 90 264 VAC 47 440 Hz 127 367 VDC e 24 VDC 1 5 A output up to four PSI302 Galvanically isolated e Failure indication and output Cabling Several types of cable may be used though shielded twisted pair is recommended Depending on the size and other factors of the cable the maximum length can vary varies Four cable types have been identified though there are many more options No special cable is required Normal instrument wires may be used However fieldbus cable is available from several vendors to make selection easier Foundation H Fieldbus Series 302 In
29. ing the device internal function blocks the speed can be improved even more For instances by using the internal PID block for control one communication less is required as compared to if the controller was in another device This reduces the control application period of execution The integral indicator is able to display each parameter belongs to function blocks which are user selectable Some of them can be changed by local action according to user configuration and properties of these parameters When a variables is chosen by the user the display shows it indicating the parameter name defined the value and its status when its exists The different fields and status indicators are explained in Figure 2 1 Typical Normal Display Showing PV in this case 50 0 2 1 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Normal Display Operation During normal operation the Series 302 device stays in the normal display mode In this mode it shows a variable indicated by user configuration See Figure 2 1 Typical Normal Display Showing PV in this case 50 0 Whenever the displayed value exceeds 19999 it will be displayed with a two digit mantissa and an exponent a Magnetic Tool EE Zero Hole Span Hole Figure 2 1 Typical Normal Display Showing PV in this case 50 0 The display indicates values and parameters simultaneously with most status indicators The normal di
30. ion and Maintenance Manual HAZARDOUS AREAS In hazardous zones with explosion proof requirements the covers must be tightened with at least 7 turns In order to avoid moisture or corrosive gases hand tighten the covers until the O rings are compressed Lock the covers closed with the locking screw Q In hazardous zones with intrinsically safe or non incendive requirements the circuit entity parameters and applicable installation procedures must be observed Cable access to wiring connections is obtained by one of the two conduit outlets Conduit threads should be sealed by means of code approved sealing methods The unused outlet connection should be plugged accordingly Should other certifications be necessary refer to the certification or specific standard for installation limitations The Series 302 devices are protected against reverse polarity and can withstand up to 35 VDC without damage Physical Signaling The Foundation Fieldbus Series 302 devices use the 31 25 kbit s voltage mode wire media option for the physical signaling All devices on the same bus must use the same signaling All devices are connected in parallel along the same pair of wires Various types of fieldbus devices may be connected on the same bus The Series 302 device is powered via bus The limit for such devices is 16 for one bus for non intrinsically safe requirements In hazardous areas the number of devices may be limited to 4 devi
31. mmunication When alarms and other critical events occur the function block automatically notifies the user by communication thus the operator interface does not have to perform periodic polling to determine if there is an alarm condition A specified period of time is spent for an acknowledgment to be received This occurs even if the condition that caused the alert to be detected no longer exists If the acknowledgment is not received within a pre specified time out period the event notification will be retransmitted The communication also automatically informs about configuration changes to static data An event is generated by internal mechanism when a change occurs so the Host does not have to make continuous checks Scheduled and unscheduled traffic represents the network I O of the function block application Through scheduled communication the transfer of parameters may be synchronized with function block execution so that function blocks which use this data receive it before they are scheduled to execute Consequently the closed loop control performance as for an analog system can be achieved Thanks to the mechanisms for passing of configuration and alarm this so called non operational traffic has been reduced to a minimum leaving more time for operational traffic and again improving control performance After configuration the system resolves tags and parameter names into a specific format which optimizes communication Us
32. munications are known from existing smart field devices protocols Higher accuracy multi variable access remote configuration and diagnostics and multi dropping of several devices on a single pair of wires Those protocols were not intended to transfer control data but maintain information Therefore they were slow being not efficient enough to be used to digital control by communication and not giving opportunity to come to control strategies totally reside in the field Fieldbus overcame these limitations Closed loop control with performance like a 4 20 mA system requires higher speed Since higher speed requires higher power consumption this clashes with the need for intrinsic safety Therefore a moderately high communication speed was selected and the system was designed to have minimum communication over head Using scheduling the system controls the variables poling algorithm execution and the traffic to optimize the network usage thus achieving high and secure closed loop performance Using Foundation Fieldbus technology with its capability to interconnect several devices very large control schemes can be constructed In order to be user friendly the function blocks concept was introduced it means basic automation functions performed by an application Each function block processes input parameters according to a specified algorithm and an internal set of contained parameters They produce output parameters that are available
33. n by moving the tool to SPAN when the choice is displayed If the options are on off or enumeration the option will appear in the value field The mnemonic of each parameter will be displayed at alphanumeric field This is for viewing only changes are not to be made to the tag configured for the block If the tag is longer than five characters it will circulate to the left fe Magnetic Tool o Zero Hole Span Hole Figure 3 8 Browsing a generic parameter For parameters that are values enter the adjustment menu by moving the tool to the SPAN hole the value will be incremented once with a _ symbol indicating that by moving the tool to the SPAN hole the value will be decreased Incrementing and decreasing at first will be slow then increasing in speed By temporarily removing the tool from the SPAN hole and then reinserting it the actuation speed is reduced Magnetic Tool Span Hole Zero Hole Figure 3 9 Acting on a generic value Unless otherwise specified the numerical field indicates the value of the actuated variable Remove the tool when the desired value is reached When browsing through options and miss the item desired just leave the tool in ZERO and wait for the option to reappear Configuration When incrementing a variable and go beyond the value desired move the tool to ZERO and wait until the decrement option of the same variable appears By moving the tool to SPAN reduce it to the desire
34. nstallation Operation and Maintenance Manual Area Classifications IEC 8 CENELEC Zone 0 Explosive gas air mixture continuously present or present for long periods Zone 1 Explosive gas air mixture is likely to occur in normal operation Zone 2 Explosive gas air mixture not likely to occur and if it occurs it will exist only for a short time FM amp CSA Division 1 Hazardous concentrations of flammable gases or vapors or combustible dusts in suspension continuously intermittently or periodically present under normal operating conditions Division 2 Volatile flammable liquids or flammable gases present but normally confined within closed containers or systems from which they can escape only under abnormal operating or fault conditions Combustible dusts not normally in suspension nor likely to be thrown into suspension LS Equipment categories IEC amp CENELEC Ex ia Explosion protection maintained with up to two component or other faults S apparatus may be connected in and associated apparatus may be connected into Zone O 1 and 2 hazardous areas Germany requires galvanic isolation and a system certificate for Zone 0 Ex ib Explosion protection maintained with up to one component or other fault S apparatus may be located in and associated apparatus maybe connected into Zone 1 and 2 hazardous areas FM amp CSA Only one category Safety maintained with up t
35. o two component or other faults S apparatus may be located in and associated apparatus may be connected into Division 1 and 2 hazardous locations Gas Classifications S Surface industries Group IIC acetylene Group IIC hydrogen Group IIB ethylene Group IIA propane Mining industry Group I methane firedamp Surface industries Class Group A acetylene Class Group B hydrogen Class Group C ethylene Class Group D propane Class Il Group E metal dust Class II Group F carbon dust Class Il Group G flour starch grain Class III fibers and flying Mining industry Unclassified methane firedamp Temperature Classifications Maximum temperature produced under fault conditions at an ambient temperature of 40 C TEMPERATURE MAXIMUM T1 450 C T2D 215 C T2 300 C T3 200 C T2A 280 C T3A 180 C T2B 260 C T3B 165 C T2C 230 C T3C 160 C T4 135 C T4A 120 C T5 100 C T6 85 C Table 1 4 Temperature Classifications Installation Barrier Entity Parameters o Maximum external capacitance Co the permitted total capacitance on hazardous area side of barrier Maximum external inductance Lo the permitted total inductance on hazardous area side of barrier Maximum output voltage Uo the open circuit output voltage from hazardous area side of barrier Maximum output current lo the short circuit output curren
36. on Operation and Maintenance Manual software version and XX software release The indication 3 XX means that this manual is compatible with any release of Series 302 field devices with software version 3 Q This Manual is compatible with version 3 XX where 3 denote VI Section 1 Network Wiring Installation Access the wiring block by removing the Electrical Connection Cover This cover can be locked closed by the cover locking screw to release the cover rotate the locking screw clockwise See Figure 1 1 Housing Rotation COVER LOCKING SCREW HOUSING ROTATION SET SCREW Figure 1 1 Housing Rotation Cable access to wiring connections is obtained by one of the two outlets Conduit threads should be sealed by means of code approved sealing methods The unused outlet connection should be plugged accordingly The wiring block has screws on which fork or ring type terminals can be fastened See Figure 1 2 Wiring Block For convenience there are two ground terminals one inside the cover and one external located close to the conduit entries Avoid routing signal wiring close to power cables or switching equipment gt OUTLETS POWER SUPPLY TERMINALS GROUND ed TERMINALS j TERMINAL SCREWSS Figure 1 2 Wiring Block 1 1 Foundation H Fieldbus Series 302 Installation Operat
37. ooting To find serious problems the FBVIEW bus analyzer application program may be used to study the communication messages in order to find the problem An oscilloscope balanced isolated e g battery operator may also be a useful tool in extreme cases Communication Errors Installation problems not configuration or others mainly cause communication errors Poor connections Wrong or no terminator placement Too low or unstable power supply Too long or over populated spurs Wrong or no grounding Water filling due to poor plugs and cable glands 1 23 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual 1 24 Section 2 The LCD Display Operation The Series 302 device has an optional digital LCD display that works as a local operator interface lt can be used for some basic configuration and operation However all configuration operation and diagnostics may also be done remotely using for example a configurator or operator console See SYSCON 3 0 User s Manual Configuration is basically assignment of tags and building of the control strategy by selecting blocks linking them and adjusting the contained parameters so as to obtain the desired operation The local and remote operator interfaces also provide monitoring and actuation of variables such as process variables and Setpoint These variables have been grouped depending on usage and may be accessed in a single co
38. ostic of the Field Devices Returning SMAR Products and or Materials Should it become necessary to return the transmitter to SMAR simply contact our nearest office see addresses list included in this manual informing the defective instrument s product model and serial number SMAR will provide you with the necessary instructions to return products to our factory In order to speed up analysis and solution of the problem the defective item should be returned with a description of the failure observed with as much details as possible Other information concerning to the instrument operation such as service and process conditions is also helpful 4 1 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual 4 2
39. selected is located Under its option just remove the magnetic tool The last occurrence of action under the magnetic tool will be displayed on the display The options above are example of some possibilities Almost any of the Function block parameters can be configured by SYSCON to be adjusted locally The user should select them from the following classes Integer Float Status Float Mode Tag read only All of them can be set or monitored by using the magnetic tool The default values for the local adjustment are trim parameters transducer output or input and Tag identifying the block and when necessary parameters to identify the borne or sensor number Transducer Block Transducer block insulates function block from the specific I O hardware such as sensors actuators Transducer block controls access to I O through manufacturer specific implementation This permits the transducer block to execute as frequently as necessary to obtain good data from sensors without burdening the function blocks that use the data It also insulates the function block from the manufacturer specific characteristics of certain hardware By accessing the hardware the transducer block can get data from I O or passing control data to it The connection between Transducer block and Function block is called channel These blocks can exchange data from its interface Normally transducer blocks perform functions such as linearization characterization t
40. si 3 1 FUNCTION BLOCK Scsi aio tabs 3 1 DISPLAY TRANSDUCER BLOCK riiai cicle tae lira pita 3 1 LOCAL PROGRAMMING TREE sisine ioe ele ei ee En e caia 3 3 DISPLAY CONFIGURATION USING SYSCON 0 0 ceecec cect teeter tenets teas seas seee sae eaesaeseneseeeaeseaeeaes 3 3 PROGRAMMING USING LOCAL ADJUSTMENT tee eee eee eeee tees no nano cnn crac cnn cana 3 5 LOCAL ADJUSTMENT METHODOL ON 3 5 TRANSDUCER BEOGK n r ia gea ita 3 7 HOW CONFIGURE A TRANDUCER BL OCh cnn cnn ncnnnnn cnn nana naar narnia 3 7 CHANNEL ergeet eege ta tii ots 3 8 CALIBRATION unn nada tdi pe tard lt rita 3 8 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual MAINTENANCE PROCEDURESGS see 4 1 GENERAL zi a deier de e ear e a a th Udine ae eed 4 1 RETURNING SMAR PRODUCTS AND OR MATERIAL 4 1 Index of Figures FIGURE 1 1 HOUSING DOTATION eeir n neea e a ra A E aa e E eE E eea aiae a it 1 1 FIGURE 1 2 WIRING BLOCK A 1 1 FIGURE 1 3 WIRE MEDIA cevetecsccsieced cidcid EENEG declina Sa aa ea teet VE eet 1 2 FIGURE 1 4 FIELDBUS NETWORK eit raae ar a a aaa e a ee r ae ee aea Ea a 1 3 FIGURE 1 5 BUS TOPOL OGN 1 4 FIGURE 1 6 a AS EDE E E E A T E EA 1 4 FIGURE 1 7 DAISY CHAIN TObOL OGN 1 5 FIGURE 1 8 DAISY CHAIN WIRING Ennen E Enne 1 5 FIGURE 1 9 POINT TO POINT TOPOLOGY c ccccceeeeeeeeeneeeeseneeeeeeaeeeeseaeeeeseaeeesesaeeeessnseeessenseeeesaaes 1 6 FIGURE 1 10 TERMINA
41. splay is interrupted when the user performs action by the local adjustment The display is also capable of displaying error and other messages See Table 2 1 Display Messages INDICATES THAT COMMUNICATION IS ACTIVE INDICATES ACTIVE en LOCAL ADJUSTMENT OPERATION ANA A INDICATES ACTIVE EEPROM SAVING OPERATION INDICATES POSSIBILITY TO ADJUST CHANGE VARIABLE MODE Figure 2 2 LCD Display Operation DISPLAY DESCRIPTION INIT The device is in initializing mode after power on BOUT The sensor is open or not connected properly When it is applicable FAIL The device presents some fail or malfunctioning FACT The device is recovering default configuration to non volatile memory Table 2 1 Display Messages 2 3 Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual 2 4 Section 3 0 Function Blocks Configuration The way to configure the communication and function block for the Series 302 devices is using a system configuration device commonly called Host The heaviest and most difficult task is automated and the risk of a configuration mistake is reduced In this system the addressing of a device is first done using the physical device tag of that device Before a new and non initialized device is connected to the network H must be configured with this tag The name of its opera
42. stallation Operation and Maintenance Manual Cable Options Type A is recommended for best possible performance Max Length Single Y Y 0 75 mm2 1900 m A Multi Y Y 0 32 mm2 1200 m B Multi N Y 0 13 mm2 400 m C Multi Y N 1 25 mm2 200 m D Table 1 1 Cable Options For non twisted cable the distance is very short even for thick and shielded wire NOTE Detail characteristics for type A Zo 31 25 kHz 100 ohm 20 O Max attenuation 39 kHz 3 dB km Max capacitive unbalance to shield 2 nF km Max DC resistance per conductor 22 ohm km Max propagation delay change 7 8 39 kHz 1 7 us km Conductor cross sectional area 0 75 mm2 Total Cable Length Maximum total cable length depends on the cable used The total length includes the trunk and all spurs rs Figure 1 13 Total Cable Length Installation Segment Length Trunk 240 m Spur 1 80m Spur 2 120m Spur 3 40m Total 480 m Table 1 2 Total Cable Length Example Entity Parameter Example It is good practice to make a table for each segment barrier listing the entity parameters for each part for easy analysis Cable Entity Parameters Pay attention to capacitance and inductance of cables Typically the L R ratio of a cable is used rather than just L since R cancels the effect of
43. t from hazardous area side of barrier Maximum output power Po the power output from hazardous area side of barrier Field Device Entity Parameters i Maximum input current li the current that may be applied to device Maximum input power Pi the power that may be applied to device Maximum input voltage Ui the voltage that may be applied to device Maximum internal capacitance Ci the residual capacitance with which the device loads the network Maximum internal inductance Li the residual inductance with which the device loads the network Intrinsic Safety Requirements Lowest Ui gt Uo Lowest li gt lo Lowest Pi gt Po Sum Ci Ccable lt Co Sum Li Leable lt Lo L Reable lt L Rbarrier SB302 Fieldbus Galvanic Isolator e Typically four hazardous area devices per barrier e Works as repeater special model e Built in terminator e Entity parameters Uo 22 5 V lo 206 mA Po 1 15W Co 154 nF Lo 300 nH L R 30 7 uH ohm e Current Capacity 60 mA Repeater Connection The SB302 safety barrier may also function as a repeater Using a repeater may increase cable length or number of devices Up to four repeaters may be connected onto one fieldbus thereby linking five fieldbus segments Cable lengths of up to 9500 may therefore be achieved Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual
44. the device into the field and connect it to the fieldbus operating network if you assigned the device stand alone e Download the configuration to the device or the whole network O The assign tag operation can be done in a device attached to an operating fieldbus network with several devices You can change the tag of a fieldbus device on an operating network without disconnecting it if the new tag does not exist yet O When you are assigning a new device s tag you are modifying your system configuration It can cause a lot of trouble in terms of the control scheme as function blocks and links configuration The whole configuration of your system should be revised Network Devices Addresses 0 15 reserved Addresses 16 247 may be used for the field instruments Addresses 248 251 default addresses used for devices which have not had their proper address assigned yet Address 252 255 visitor addresses used by temporarily connected devices like configurators Wiring DOs and Don ts Normal wiring procedures apply e No loose connections No exposed conductors Water proof junction boxes Signal wires not too close to power wires No safety barriers in parallel Foundation H Fieldbus Series 302 Installation Operation and Maintenance Manual Intrinsic Safety Galvanic Isolator May be used instead of safety barrier A special fieldbus isolator with repeater is required Does not require sa
45. tion and Maintenance Manual Bus Topology Devices are distributed along the trunk connected through spurs A spur may be up to 120 m long mae ges JE ERE J EEN Trunk Terminator E 3 ECH SS E Q S Figure 1 5 Bus Topology Tree topology A main trunk runs from the control room into the field where it branches out to the individual devices For tree topology it is important to ensure that the spur length does not exceeds the maximum allowed Trunk Figure 1 6 Tree Topology 1 4 Installation Daisy Chain Topology Cable is chained from device to device It is important to ensure that a device may be disconnected without other devices also being disconnected Therefore make sure to use same conduit for in and out wires in order to enable removal of device without interrupting bus Terminator ES Ate Figure 1 7 Daisy Chain Topology O Figure 1 8 Daisy Chain Wiring Foundation H Field
46. tion is Assign Physical Device Tag 1 Connect a configurator to the non initialized Series 302 device alone on the line Assign the physical device tag to the Series 302 device 2 The Series 302 device is now initialized and can be connected to the others devices into the network 3 The configurator will automatically assign a station address to the Series 302 device recently hooked into the network bringing it to initialized mode 4 The Series 302 device is brought to the operational state and its ready to be configured as part of the control strategy See how to configure the physical device tag and how to configure On line and Off line the Series 302 device in the SYSCON 3 0 User s Manual NOTE The local adjustment can be used for some operations and configuration tasks This eliminates the need of a powerful system configurator but requires more knowledge of the fieldbus communication mechanism This may be a money saving solution for small systems but it is very time consuming and susceptible to configuration errors in a large system See in the Local Adjustment Methodology section how to use the local adjustment See Function Blocks Instruction s Manual Display Transducer Block The Series 302 device can be equipped with one LCD In the normal monitoring mode not executing actions by the local adjustment the display can show one variable The Display Transducer Block can be configured by SYSCON In the example
47. ttached to the I O hardware it has access to a lot of information about hardware status sensor connections control circuit by feedback action Non volatile memory burned Automatic Zero Failed etc Another status from Transducer block configuration as Excess Correction Under Span Minimum Allowed Applied Process Out of Range Calibration Failed etc can be received after certain operations TROUBLESHOOTING SYMPTOM PROBABLE SOURCE OF PROBLEM Device Connections Check wiring polarity and continuity Check for shorts or ground loops Check if the power supply connector is connected to main board Check if the shield is not used as a conductor It should be grounded at only one end Power Supply Check power supply output The voltage must be between 9 32 VDC at the Series 302 device terminals Noise and ripple should be within the following limits Network Connection NO COMMUNICATION Check that the topology is correct and all devices are connected in parallel Check that two bus terminators are OK and correctly positioned Check that the bus terminators are according to the specifications Check length of trunk and spurs Check spacing between couplers Network Configuration Make sure the Device Tag is configured if system configuration is desired Make sure that device address master connection and the address Electronic Circuit Failure _ Check the main board for defect by replacing it with a spare one Table 4 1 Diagn
Download Pdf Manuals
Related Search