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User Guide - DM4000U

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1. 1 3 CLOSED 2 3 OPEN 1 3 OPEN 2 3 CLOSED i CLOSED H CLOSED 3 OPEN 3 1 zZ OPEN IH ALARM 1 3 OPEN 2 3 CLOSED 1 3 CLOSED 2 3 OPEN 1 3 OPEN 2 3 OPEN 1 3 CLOSED 2 3 CLOSED 4 2 3 1 6 SENSE Invert activation of relay This option sets the sense of the relay ie in the event of an alarm is the relay to be energised or de energised Page 53 OUTPUT MENU PROGRAMMING The options are noninv energise relay on alarm de energise normally iNv energise normally de energise relay on alarm This function is tied in with the fail safe requirements of the relay and its electrical configuration The following summarises all options Default setting noninv 4 2 3 1 7 dElAy Delay before activation of alarm This option allows a delay time to be programmed in seconds which must elapse between an alarm being detected and then indicated and relay state changed The options are oFF No delay time 1 SEC 1 second delay 2 SEC 2 second delay 5 SEC 5 second delay 10 SEC 10 second delay 15 SEC 15 second delay 20 SEC 20 second delay If the alarm condition is removed during the delay period and then re applied the delay time starts again from the time the alarm condition re occurs Default setting OFF OUTPUT MENU Page 54 PROGRAMMING 4 2 3 2 curnt1 3 CURRENT OUTPUT RETRANSMISSION BOARD The current retransmission board provides a range of curr
2. lt ACK gt Acknowledge lt BCC gt Block Check Character For the purposes of this example assume that the MASTER is connected to three SLAVE units as shown in the above schematic The Device numbers for the units are 1 2 and 3 and device number 2 has an Thermocouple input measuring 79 8 degrees C and an Alarm Output APPENDIX E Page 84 APPENDICES EXAMPLE 1 DATA REQUEST The MASTER requests the Process Variable from SLAVE device 2 The process is initiated by the MASTER sending the following message 02 lt STX gt CH000 lt ETX gt lt BCC gt In order to see what actual data is sent from the host see the table below Note that the data is in hexadecimal PC MASTER TO SLAVE DEVICE S DATA REQUEST son we sre enna fem ace ro fo a 02 ar 65 40 J 50 50 an oc All three units receive the message although units 1 and 3 will disregard it as the 02 carried in the initial part of the message designates the message as being for device 2 only Device 2 on receipt of the message recognises the 02 address as its own device number and examines the main part of the message to see what action to take The main part of the message in this case is CH000 The question mark is the first character and is used to denote that the message is a data request CH is a mnemonic representing CHannel value Process Variable A full list of mnemonics are available later on in this Appendix The remainder of the message is called the index
3. and as there is only one Channel on this device it is superfluous and is set to zero Having recognised a valid message the instrument first acknowledges back to the host and then replies with the current Process Variable value The format for the message is shown below notice there is no device number embedded in the message there is only one MASTER device SLAVE DEYICE TO MASTER REPLY Ta ex Jace ok sons ros or we 20 oa ws elo lofi Page 85 APPENDIX E APPENDICES EXAMPLE 2 DATA IMPOSITION For a second example take the case of the MASTER issuing a message this time to change an Alarm Setpoint value again directed at device 2 The MASTER sends the following sequence PC MASTER TO SLAVE DEVICE S DATA IMPOSITION 14S00180 0 ERT KA asuor Fn ote ela r 53 a J s 50 50 lx 50 03 ac The receipt of the message by device number 2 is exactly as in the previous example This time however the indicates the message is a data imposition and applies to the Alarm Setpoint AS There are two alarms the index 001 indicates that it applies the first Alarm Alarm 2 would have an index of 002 Device 2 updates the Alarm setpoint with 80 0 and then responds with an acknowledgement as shown below There is one important point to understand here The new Alarm Setpoint has been SLAVE DEVICE TO MASTER REPLY cx son s1 Jack ex ace os or 02 06 03 os programmed into the device and will be us
4. Cold Junction Select This is only shown if thermocouple has been selected as input type This entry provides choice of cold juction compensation between a internal thermistor measuring the actual input terminal temperature or a set programmable temperature INtErN Internally measured input terminal temperature PrOG Programmable Cold junction default setting INtErN 4 2 2 7 PrOGCJ Programmable Cold Junction This is shown if CJ has been set to PrOG and contains the value with which the thermocouple calculation will use as cold junction The value is in engineering units Degrees C or Degrees F Page 39 INPUT MENU PROGRAMMING Default setting 0 0 4 2 2 8 LO and Hl Rate Engineering range LO and HI are used to define the engineering range for Rate This range applies to low and high electrical inputs being monitored by the unit For example if the electrical input has been set to Volts on the 100mV range and it is required that the Rate value be 0 0 at OmV input and read 50 0 at 100mV LO and HI are set to the following values LO 0 0 HI 50 0 The display value will increase linearly from 0 0 to 50 0 as the millivolts increase from PROCESS OVER RANGE VARIABLE TDD tid HI 50 0Od evn essnessseessessnscenncsnnessnorsnessnecennssnsssnnessnesonessnssenscenssenssennessneseny A is as ERINDI RO sree 50 0 fe rcvcccsccescecccsoccscccascossescccssscessossoosscesecsessesccaseascoconccccsessoscesssccoscussoesc
5. OPERATION 5 1 1 VIEW SETPOINTS The function of this mode is to provide a quick read only access to the Alarm setpoints This operation is easier to do than to describe and is therefore shown diagramatically below Pressing the CYCLE key puts you into VIEW SETPOINTS MODE The display will show the first setpoint number available to be viewed possibly SEtP1 Successive pressing of the CYCLE key will cycle through the other available setpoints If any setpoint value is required to be viewed the SHIFT key s SETPOINT VALUE AND TYPE The format of the setpoint display will be lt alarm action gt lt Setpoint value gt where alarm action will be one of four single characters o Alarm Off L Low Alarm h High Alarm d Deviation Alarm The Setpoint will be a five digit value scaled in engineering units pressed The actual setpoint value is now displayed Page 69 USER OPERATION OPERATION 5 1 2 VIEW PEAK VALUE The maximum Process Variable value measured since switch on or last reset of Peak Valley See 5 1 4 is continuously calculated within the instrument The current value may be inspected by pressing the SHIFT key whilst in Display PV mode The display will briefly show PEAc before revealing the actual peak value This value will remain displayed until 1s after the key is released It will then return to the Process variable display 5 1 3 VIEW VALLEY DISPLAY This operates in exactly the same w
6. The following diagrams on the next page show the different output responses for a variety of configurations OUTPUT MENU Page 56 PROGRAMMING rtx hi gt rtx lo CURRENT OUTPUT 246mA 4mA BmA i i Z rtx lo rtx hi 100 ENGINEERING RANGE CURRENT rtx hi gt rtx lo OUTPUT 24mA BmA H B rtx lo rtx hi 100 ENGINEERING RANGE CURRENT OUTPUT 20mA rtx hi gt rtx lo LAMA AMA i H4 rtx lo rtx hi ENGINEERING RANGE 1466 CURRENT OUTPUT 20mA 4mA AMA 4 rtx hi rtx lo ENGINEERING RANGE 106 CURRENT OUTPUT 246mA a mA 4 4 rtx hi rtx 10 1494 ENGINEERING RANGE CURRENT OUTPUT 26nA 18nA rtx hi lt rtx lo OMA H Ls rtx hi ENGINEERING RANGE 6 160 rtxlo 100 Page 57 OUTPUT MENU PROGRAMMING 4 20mA 0 20mA 0 10mA 4 2 3 2 5 PrESEt Preset output value This line is only available if PrESEt has been selected as the tyPE of operation In this mode the current output will directly relate to the value set within this programmable option The value entered must fall within the hi and lo range and will cause the maximum current to be output when set to the hi value and the minimum output current when set to the lo value OUTPUT MENU Page 58 PROGRAMMING 4 2 3 3 Vprog1 3 Bridge Excitation board This menu entry is available when a bridge excitation board is fitted in either slot 1 or 2 This is used to program a fixed voltage output from t
7. password submenu communication submenu Specification Troubleshooting Unpacking the instrument Voltage excitation card accuracy voltage board calibration voltage outputs wiring Wiring input connections output connections comms connections 17 50 50 50 51 52 53 54 67 11 35 71 60 64 75 80 77 66 59 20 12 17
8. BC EXAMPLE BASIC PROGRAM APPENDIX E Page 88 APPENDICES The following basic program provides an example of a simple communications interface to run on a PC The program is coded to use COM1 and communicate with device 1 but these may be modified as required 10 OPEN COM1 9600 N 8 1 AS 1 header 01 20 INPUT Enter text string 0 to quit text if text 0 goto 90 50 gosub 100 PRINT 1 TX 70 gosub 200 if left text 1 then mid text 1 1 goto 50 80 print RECEIVED rx goto 20 90 end 100 REM Calculates block check character based on header and text strings 150 sum 0 Ih len header lt len text 170 for i 1 to I h sum sum asc mid header i 1 next 180 for i 1 to It sum sum asc mid text i 1 next bcc sum 256 int sum 256 190tx chr 1 header chr 2 text chr 3 chr bec 195 return 200 REM Reads in received data without checking block check character 240 rx 245 ch input 1 1 if ch lt gt chr 1 goto 245 250 ch input 1 1 if ch lt gt chr 2 goto 250 260 ch input 1 1 if ch chr 3 goto 270 265 rx rx ch goto 260 270 return The following tables list the available comms mnemonics for the instrument RATE IN ENGINEERING UNITS Page 89 APPENDIX E APPENDICES INSTRUMENT DESCRIPTION PROCESS VARIABLE IN ENGINEERING UNITS NO OF DECIMAL PLACES FORENG UNITS SENSOR INPUT TYPE VOLTAGE RANGE CURRENT RANGE THERMOCOUPLE TYPE
9. has been generated from an external power supply or from another instrument The second type measures current generated from the units own 20V excitation supply Before connecting up a current input it is important to establish which one of these two groups apply 3 2 2 1 CURRENT MEASUREMENT OF AN EXTERNALLY GENERATED LOOP In order to measure the current in an externally generated loop it is necessary to insert a resistor in circuit and use the instrument to measure the resultant voltage drop Note that the instrument will need to be configured as a 1 5V input and not a 4 20mA input this is described later in the programming section The diagram shows the necessary connections 3 2 2 2 CURRENT MEASUREMENT OF AN INTERNALLY GENERATED LOOP The instrument has an excitation CURRENT oN supply which can be used for SUPPLY aw h generating a current loop If this is used the circuit is connected in the following way Note that the current input has an internal impedance of 50 ohms CURRENT RTN SENSOR CONNECTIONS Page 14 INSTALLATION 3 3 3 THERMOCOUPLE INPUTS Thermocouples are simply connected to the millivolt input as shown opposite The cold junction compensation is performed by the integral sensor at the rear of the unit or by a programmable cold junction value For best accuracy it is important that the rear plate is fitted to prevent draughts causing temperature differences between the cold junction sensor an
10. impedance Approx 5uA See safety information on page 8 VOLTAGE OUTPUT BOARD OPTION 04 PERFORMANCE 20 C Range 2 24 volts DC Accuracy 24mV 0 1 of Max voltage Maximum Current O P 50mA amp Thermal Drift 1080uV C 0 0045 of Max voltage C Ripple Approx 6mV Fixed Voltage 24V Programmable Voltages Isolation Input Power Supply Comms I F Page 77 2 2 5 3 3 9 4 4 5 5 6 7 8 9 10 12 15 20 S5OOVAC see safety 2500VAC information S00VAC on page 8 APPENDIX B APPENDICES RS485 COMMUNICATION OPTION GENERAL Configuration Maximum fan out Baud Rate Data bits Start bits Stop bits Parity Maximum line length Protocol TRANSMITTER Maximum differential output voltage Output voltage with 50ohm load RECEIVER Differential input threshold voltage Input receiver impedance Common mode range ENVIRONMENTAL Ambient operating temperature range Ambient storage temperature range Relative Humidity EMI Emissions EMI Susceptibility Safety Power Supply Power consumption Max in rush current Front panel sealing with gasket APPENDIX B IP65 Four wire Half Duplex 32 units viii 9600 8 1 1 none 4km based on ANSI X3 28 gt 1 5v 200mV 12kohms 7v to 12v 0 to 50 C 20 to 80 C 20 to 95 non condensing BS EN61326 BS EN61326 BS EN61010 1 240VAC 11OVAC 24VAC 50 60Hz 6 5Watts max 100mA 240VAC Page 78 APPENDICES PHYSICAL Dimension
11. lines together this does depend upon each unit being given a unique address or device number a subject which is dealt with in the programming section of this manual It may be necessary to screen the communications wiring if installed in a very noisy electrical environment The screen should be grounded at one point only UHIT FURTHEST AWAY INSTRUMENT n INSTRUMENT 3 INSTRUMEHT 2 IHSTRUMEHT 1 YT BIASING TERMIHATION gt BIASING 3 4 2 LINE TERMINATION Termination resistors should be put on the receive inputs of the Host PC and the instrument furthest away from it This is shown schematically above The instrument has a 100 ohm termination on the comms board which may be connected in circuit by moving a user selectable link The normal position when the unit leaves the factory is with the resistor disconnected Page 23 COMMUNICATIONS INSTALLATION There is more to the termination at the Host PC receiver The additional resistors ensure that when all units are tri state the differential line rest in an idle state and therefore do not risk detection of spurious data due to noise or slight offsets in the differential inputs 3 5 3 CONNECTING MORE THAN 32 UNITS RS485 has a drive limitation of 32 receivers If additional instruments are required there is a logical maximum of 99 units it is necessary to buffer the Host PC transmitter as shown in the diagram below INSTRUMENT 1 Y RX TX INS
12. ohm 0 001 IM ohm x 0 001 0 004 2M ohm 0 002 0 011 51 ohm 0 001 less than 1 lmA 0 013 C NA 0 06 C 2500VAC S5OOVAC _ see safety information S00VAC on page 8 INPUT OVER RANGE PROTECTION Input Pin Usual Function 1 OV 2 RTD 3 Volts 4 Millivolts 5 Curret Absolute Maximum Rating NA 30VACGI 200VACGi 200VACGi 100mA RELAY OUTPUT BOARD OPTION 01 AND 02 Maximum Rated Load Maximum Power Maximum Switching Voltage Electrical Life Mechanical Life Contact shunt capacitance TA 250V 7A 30V 1750VA 210W 380V 125V 10 operations at rated load 50 million operations 200pF This is due to the Varistor and causes a reactance of 15Mohms at 50Hz Alarm detection delay APPENDIX B 200mS Page 76 APPENDICES CURRENT RETRANSMISSION BOARD SOURCE AND SINK OPTION 03 PERFORMANCE 20 C Accuracy 20uA Resolution 2uA Response OmA 21mA approx Minimum Current O P Maximum Current O P Thermal Drift Maximum loop impedance Output voltage drop 20mA Maximum external loop power supply voltage Minimum practical loop power supply voltage Ripple Current Isolation Input 500VAC Power Supply 2500V AC Comms I F 500V AC 0 1 of Max current 0 01 of the input range 100ms for approx 63 of step change 900nA C 0 0045 of Max current CC 1000 ohms Source 3 Volts Source amp Sink 30VDC Sink Rye 21mA 3 Sink Where R is the Loop
13. open circuit is detected the process variable is forced full positive range or full negative range depending upon the brnout setting in the Inputs menu burn will be shown on the display in place of the Process Variable display 5 2 4 2 UNDER RANGE OVER RANGE This is only checked for voltage or current inputs If the input value is found to be greater that 107 of full range or less than 107 of full range it is limited to 107 or 107 of full range respectively In this case either OVEr or UNdEr is shown on the display instead of the process variable value This condition will also occur if the user nonlin conditioning is used and the input falls below the minimum entry or exceeds the maximum 5 2 5 OUTPUT CONTROL The alarm Relays LED alarms and current retransmission options may all use the filtered conditioned Process Variable Value This is the same value which is displayed This process responds to any errors detected If the input is a temperature sensor an open circuit will invoke the burnout condition going to hi scale or low scale depending upon the burnout programming 5 6 DISPLAY This will show the Process Variable in engineering units filtered and conditioned If any errors have been detected they will be indicated on the display The number of places of decimal will be as defined in the rES entry of the inputs menu but if there are more significant digits than can be displayed within the five digit field availabl
14. rear A gasket is available and should be fitted wherever sealing of the instrument is required See diagram below The maximum panel thickness is 3 5mm with a gasket and 4 5mm without The gasket has a self adhesive side which should be stuck to the panel around the cutout The instrument may then be inserted and tightened against the gasket to form a seal The panel should be clean and smooth for the seal to be effective GASKET IF FITTED SLIDING CLAMP CLAMP BRACKET Page 9 INSTALLATION 3 0 WIRING This section describes how the instrument should be wired for the Power Supply Input Sensor or any Output options that may be fitted All connections are made to three or five way sockets which are removable for ease of wiring Installation should be undertaken in accordance with relevant sections of BS6739 British Standards code of practice for Instrumentation in Process Control Systems Installation design and practice See important safety information on page 8 3 1 POWER SUPPLY The Power supply rating will be indicated on the top of the instrument Ensure that this is correct for the voltage that is to be connected If there is a difference refer to Service Manual for details of power supply adjustment H H w Note that the power supply socket has had polarisation keys fitted to prevent insertion into any other plug at the rear of the instrument A The connection is made as shown Ziti a Ensure tha
15. root menu Notice that after reaching CALIB the menu position wraps around to the start This principle of menu operation is applied throughout the system 4 1 2 2 GETTING INTO A SUBMENU Up to now we have simply moved within the Root menu in order to get into a submenu we must first cycle around the Root menu until the required submenu is displayed A cycLe SHIFT For the purposes of this tutorial press the CYCLE key until InPut is displayed In order to get into the INPUT menu simply press the SHIFT key Page 29 TUTORIAL PROGRAMMING SENSor will now be displayed we are now in the Input submenu The diagram below shows our position in relation to other items in the menu INPUt res H Lo FILtEr u out bof cona HA USEr brnout CUProG w1 mt out ane oz eeeeeee an As before pressing the CYCLE moves the menu position from left to right wrapping around at the end Do not worry if the contents of the menu as shown above is not exactly as you find the unit alters items in the menu list depending upon settings made TUTORIAL Page 30 PROGRAMMING 4 1 3 EDITING A PARAMETER Although the items displayed in the menu can either be submenus or parameters most of the items in the Inputs menu are parameters This means that they can be edited A JevcLE SHIFT We are now in EDIT mode This mode is indicated by a flashing display The display shows the contents of the parameter bein
16. the menu position has automatically stepped on to the menu item This may be done anywhere in a menu Pressing the ESCAPE key from our current position in the Inputs menu takes us back to the Root menu The Root menu as its name suggests is not a submenu Pressing the ESCAPE key sequence whilst in the Root menu will take the user out of MENU mode and into the DISPLAY PV mode Thus the monitored process variable will be shown on the display Note that escaping to DISPLAY PV mode saves all programmed data to non volatile memory retaining it during switch off Page 33 TUTORIAL PROGRAMMING 4 2 THE MENUS The previous section explained how to get into program mode to move around the menus and how to edit This section details the contents of the menus and explains how to program the unit for your own particular application As described before Program mode is entered by pressing ENTER then CYCLE from the process variable display This takes the system into the Root menu The Root menu is divided into five submenus SETPOINTS INPUTS OUTPUTS SYSTEM and CALIBRATION OUtPUt SETPOINTS INPUT OUTPUTS SYSTEM CAL IBRAT ION SUBMENU SUBMENU SUBMENU SUBMENU SUBMENU Note If there are analog output options fitted Current output or Voltage output in both output slot positions there will not be any setpoints available and the SETPOINT submenu will be removed from the Root menu ROOT MENU Page 34 PROGRAMMING 4 2 1 Th
17. 52 314 2063 03 DM4000U SMART INDICATOR Whilst every effort has been taken to ensure the accuracy of this document we accept no responsibility for damage injury loss or expense resulting from errors or omissions and reserve the right of amendment without notice lt STATUS gt INSTRUMENTS This document is issued by Status Instruments Ltd and may not be reproduced in any way without the prior written permission of the company Page 1 August 2003 1 0 2 0 3 0 4 0 5 0 Appendix A Appendix B Appendix C Appendix D Appendix E Index CONTENTS GETTING STARTED INTRODUCTION UNPACKING INSTALLATION WIRING USER GUIDE PROGRAMMING OPERATION FITTING OF LEGEND ID SPECIFICATION TROUBLESHOOTING MAINTENANCE USER COMMUNICATION SOFTWARE Page 2 25 67 68 73 74 75 79 80 81 82 83 92 93 94 GETTING STARTED Page 3 1 0INTRODUCTION This instrument is a universal digital indicator which supports a wide range of input types A great advantage with this unit is its ability to adapt to a wide variety of applications A comprehensive set of programming menus allow the instrument to be entirely re configured from the keypad The diagram below identifies features on the front panel BRIGHT SIX DIGIT DISPLAY DISCRETE LED INDICATORS LEGEND WINDOW CYCLE KEY SHIFT KEY INCREMENT KEY Page 4 The diagram of the rear panel below shows the slot positions for
18. 62 sensor connection 37 device number 63 electrical range 37 comms state 63 thermocouple type 38 Communication software 83 temperature sensing units 38 Comms mnemonics 90 resolution 39 Current retransmission select cold junction 39 wiring 19 programme cold junction 39 current output submenu engineering range 40 output span 55 burnout 41 output operation 55 filtering 42 retransmission range 56 jump out 43 preset value 58 conditioning 44 calibration 65 user linearisation 45 square root 46 power 3 2 5 2 law 47 Page 93 INDEX L Legend sheet M Maintence Mechanical installation Menus setpoints input output system calibration O Output card wiring relay board current board voltage board calibration Output submenu relay and led alarms submenu current output board bridge excitation board P Password submenu code level automatic cycle Power supply wiring wiring precautions Programming tutorial guide user key definitions getting into menu mode moving around the menu entering into a submenu editing a parameter escaping from submenus 35 36 48 60 64 17 19 20 65 49 55 59 61 61 61 10 11 27 28 28 29 29 31 33 Page 94 Relay boards wiring submenu alarm state latch enable setpoint hysteresis deviation band invert activation of relay delay Reset all parameters to default Sensor connections Setpoints setpoints submenu view setpoints Signal conditioning System parameters
19. AMMING 4 2 2 1 SENSOr Type of sensor connected This parameter defines the type of electrical sensor connected There are four options currnt Current inputs internally generated loop tc Thermocouple input VoltS Voltage input including millivolts rtd Resistance thermometer default setting currnt 4 2 2 2 rANgE electrical range for voltage or current inputs This Range parameters will only be available if the sensor option has been set to either current or voltage The options available will vary between these two settings 4 2 2 2 1 rANgE SENSOr currnt If the sensor type has been set to current the following options are available 4 20 Internally generated 4 20mA 0 20 Internally generated 0 20mA 0 10 Internally generated 0 10mA default setting 4 20 4 2 2 2 2 rANgE SENSOr VOLItS If the sensor type has been set to voltage the following options are available 0 100 100mV on the millivolt input 1 1 Volt on the voltage input 1 5 1 to 5 volts on the voltage input 10 10 volts on the voltage input default setting 0 100 Page 37 INPUT MENU PROGRAMMING 4 2 2 3 SENSOr Type of thermocouple This menu option is only available if a thermocouple has been selected as sensor type This option allows the user to set the thermocouple type The options are CA K type thermocouple J type thermocouple T type thermocouple R type thermocoup
20. ARM IN ALARM 1 3 CLOSED 1 3 OPEN 2 3 OPEN 2 3 CLOSED 1 3 OPEN 1 3 CLOSED 2 3 CLOSED 2 3 OPEN 1 Zi 1 Zi 3 3 3 3 OPEN CLOSED OPEN 2 3 CLOSED CLOSED 1 3 OPEN CLOSED 2 3 OPEN 1 3 3 If the current to be switched is very low lt 100mA the varistors on the relay board may need to be removed RELAY OUTPUT Page 18 INSTALLATION 3 4 2 Current Output Retransmission option 03 The Current output board can support current loops generated from an external power supply or generate a loop source from the instrument itself Both of these cases are shown in the diagrams below EXTERNAL POWER SUPPLY 16 36 VOLTS SENSING RESISTOR 1k MAX 3 OUTPUT VOLTAGE z m 4 26mAi Note that connecting directly across pins 1 amp 3 may cause damage to the output card The instrument may be used as a voltage output by connecting a suitable resistor between pins 1 and 2 For example by placing a 250 ohm resistor across pins and 2 and setting the output board to 4 20mA the voltage output will produce a voltage between 1 and 5 volts Page 19 CURRENT OUTPUT INSTALLATION 3 4 3 Voltage Output Bridge Excitation option 04 There are two options Either a programmable 2 to 20 volt output or a fixed 24 volt output The connections for both cases are shown below PROGRAMMABLE eto2e6 VOLTS CONSTANT lt 24 VOLTS OUTPUT VOLTAGE OUTPUT Page 20 INSTALLATION 3 5 C
21. ICAL UNITS Selection of this option for Cond allows access to the User submenu Within this menu thirteen points may be programmed to relate electrical input to engineering value These points are represented by IN and OUT entries within the menu where IN are the electrical inputs and OUT the resultant engineering value An example of a user linearisation utilising all thirteen points is shown below There are a few rules which should be followed when using this facility a The HI and LO values for engineering range should have been set before any entry of data Any engineering values entered should lie between HI and LO b The entries for the electrical inputs should progressively increase There is no such restriction on the engineering units c Tf not all thirteen points are used it is necessary to reproduce the values in the last entry in entry 13 Page 45 INPUT MENU PROGRAMMING d Any electrical input falling outside the bounds specified by the table will be regarded as out of bounds and under range or over range will be indicated instead of the Process Variable If a small amount of valid signal over under range is required this must be built into the linearisation table PROCESS SQUARE ROOT HI VARIABLE ENGINEER ING RANGE LINEAR Lo ENGINEER ING RANGE PH ELECTRICAL INPUT mY 1866 4 2 2 14 Square Root When the Square root characteristic has been selected the engineering range will still increase fro
22. INEERING UNITS ENGINEERING UNITS 2 2 5 3 3 5 4 4 5 5 6 7 8 9 10 12 15 20 ENABLED DISABLED UNSIGNED INTEGER SETPOINT INPUT OUTPUT SYSTEM CALIB ENGINEERING UNITS APPENDICES DATA FORMAT DEFINITION NO DATA OPTION VALUE No data actually transferred This type of message initiates an activity within the instrument rather than accessing data For instance sending the Text string ds will cause the unit to store its scratch parameter data area to EEPROM This must always be done after configuration parameters have been modified via the Comms If this is not done the changes will be lost when the instrument is switched off An ASCII number corresponding to the position of an item within the list of parameters denoted in the associated FORMAT column of the Message table The numbering starts from zero E G An Alarm action AA High Alarm will have a data field corresponding to 2 These are ASCII numeric fields which are scaled and formatted according to the entry in the FORMAT column of the message table TYPE OF DATA LOW HIGH FIELD DECIMAL LIMIT LIMIT WIDTH PLACES ENGINEERING UNITS ENG HI 7 ENGH 7 6 DP REAL 32000 64000 6 DP ELECTRICAL UNITS 10 Volt range 10 10 6 2 1 5 Volt range 0 5 6 3 1 Volt range 1 1 6 3 100mV range 100mV 100mV 6 1 4 20mA 0 20 6 2 0 20mA 0 20 6 2 0 10mA 0 10 6 2 of Eng range 0 00 99 99 5 2 Unsigned integer 0 65535 3 0 Page 91 APPENDIX E APPENDICES STRI
23. LIBRATION MENU Page 66 PROGRAMMING If the Voltage Output Board Bridge Excitation is to be fitted in the unit by the user it is necessary to use this entry to calibrate the option Connect up the Voltage output board to the Sensor input board as shown below Press ENTER to commence automatic calibration ENTER Note if the display reads either siglo or sighi recalibrate the output card again On completion ESCAPE back to the Process Variable display mode This stores the calibration information into non volatile memory 4 2 5 5 rESEt Reset all parameters to default Pressing ENTER on this option resets all programmable parameters to their default values Page 67 CALIBRATION MENU OPERATION 5 0 OPERATION Previous sections have shown how the unit may be configured for user applications This section shows how the user may access additional information from the Display PV mode and an explanation of how the instrument processes input data and activates outputs 5 1 USER OPERATION There are a number of facilities available from the Display PV mode using the front panel keys These are summarised in the table below KEYPRESS ACTION VIEW SETPOINTS VIEW PEAK VALUE VIEW VALLEY VALUE CLEAR LATCHED ALARMS RESET PEAK VALLEY In addition it is possible to get into Menu Mode by pressing ENTER followed by A JevcLE USER OPERATION Page 68
24. NG This is an individually formatted string usually but not always read only See below for details SY System request This reports upon the identity of the instrument This may only be data requested the returned data format is as follows aabbbbbbOccde0000ff0000 aa device type DM for Digital Meter bbbbbb Issue date of software cc Variant type U 01 C 02 A 03 d Contents of option slot 1 Nothing fitted 0 Single Relay board 2 Dual Relay board 3 Volt o p 4 RTX board 5 e Contents of option slot 2 Format as above ff Number of channels 01 always APPENDIX E Page 92 INDEX A D Accuracy 75 Display information 12 Alarms E Submenu 48 Editing a parameter 31 alarm state 49 Error codes 81 latch enable 50 F setpoint 50 Instrument faults 13 hysteresis 51 Filtering deviation band 52 description 71 relay state 53 input filtering 42 delay 54 jump out 43 B G Burnout 41 Comms board grounding problems 24 C I Calbration submenu Input wiring input offset adjustment 64 sensor connection 11 input calibration 65 voltage input current o p card calibration 65 millivolt 12 voltage o p card calibration 66 voltage 12 reset parameters to default 67 voltage greater than 10V 13 Cold junction select 39 current input Comms board external loop 14 description 21 internal loop 14 wiring 22 thermocouple 15 line termination 23 RTD 15 connecting above 32 units 24 transducer bridge 16 Communication submenu Input submenu baud rate
25. OMMS BOARD This section explains how the instrument may be connected to a Host computer either individually or as part of a multidrop network Although a Personal Computer is shown as the host device any computer capable of generating RS485 may be used The electrical communications standard RS485 is used instead of the commonly available RS232 as its robustness is more suitable for process instrumentation The Comms board is fitted in its own dedicated slot accessible from the rear of the instrument as identified below Although RS485 is the recommended interface RS232 has been found to operate 9 WAY 25 WAY Page 21 COMMUNICATIONS INSTALLATION satisfactorily on some PCs over short distances This is not a recommended arrangement but if required for evaluation should be wired as follows SMART INDICATOR Amplicon Liveline 4 Model RX A 485F25 5 TO 13V DC 3 5 1 BASIC CONNECTIONS The diagram below shows the basic connections between the instrument and a Host PC The Tx and Rx signals are both differential therefore they should be twisted wires for best operation over long distances For multidrop operation the instruments should be connected as shown below COMMS PORT COMMS PORT COMMS PORT COMMS PORT DEVICE 1 DEVICE 2 DEVICE 3 DEVICE 4 COMMUNICATIONS Page 22 INSTALLATION As only one instrument can transmit at a time It is possible to connect all of the transmit
26. Page 81 APPENDIX C APPENDICES APPENDIX D MAINTENANCE The instrument is a precision piece of electronic measuring equipment and yet due to the nature of its design requires very little maintenance 1 CLEANING The only cleaning required is to wipe the front panel with a damp cloth containing a small quantity of detergent DO NOT use an abrasive cleaner DO NOT use any industrial solvents as they might affect the polyester membrane DO NOT apply water to any other part of the instrument other than the front panel The rear of the instrument is not sealed and water in this area could be dangerous and may lead to damage of the instrument APPENDIX D Page 82 APPENDICES APPENDIX E USER COMMUNICATION SOFTWARE This section aims to provide sufficient information to enable a user to write software for a Personal Computer to interface directly with instruments on a network As all configuration and runtime data are available via the comms there is great potential to tailor a system to a users individual requirements Information for electrically connecting a network of units is dealt within the wiring section of this manual This section explains the software interface and the basic comms operation of the instrument The schematic of a typical network showing three instruments is shown below Note that this is not wiring detail only a schematic of signal interconnections UNIT 1 UNIT 2 UNIT 3 You will notice that
27. TEMPERATURE SENSOR BURN OUT TEMPERATURE SENSING UNITS ENGINEERING UNITS HIGH RANGE ENGINEERING UNITS LOW RANGE INPUT CONDITIONING FILTER FACTOR TIME CONSTANT SECONDS FILTER JUMP OUT PERCENTAGE USER LINEARISATION ELECTRICAL UNITS USER LINEARISATION ENGINEERING UNITS RM ACTION RM LATCH ENABLE RM SETPOINT RM HYSTERESIS RM DEVIATION RM RELAY SENSE RM DELAY SECONDS RM CONDITION CURRENT RTX SPAN OUTPUT CURRENT RTX MODE OF OPERATION CURRENT RTX HIGH RANGE CURRENT RTX LOW RANGE CURRENT RTX PRESET VALUE PROGRAMMABLE VOLTAGE OUTPUT AUTOCYCLE PASSWORD CODE PASSWORD LEVEL USER OFFSET GENERAL SYSTEM STATUS REPORT SYSTEM CONFIGURATION REPORT STORE DATA TO NON VOLATILE MEMORY APPENDIX E COMMS MNEMONICS CH NA Page 90 DATA FORMAT OPTAIN OPTAIN VALUE VALUE VALUE OPTAIN OPTAIN OPTAIN OPTION OPTION VALUE VALUE VALUE OPTION OPTION VALUE OPTION VALUE STRING STRING NO DATA 1ENGINEERING UNITS 0 1 2 3 VOLTS RTD CURRENT T C 100mV 1V 1 5V 10V 4 20 0 20 0 10mA K J T R S E F N B HIGH LOW GF REAL REAL LINEAR SQUARE ROOT USER DEFINED OFF 0 5 1 2 4 8 16 32 NONE 1 5 10 ELECTRICAL UNITS ENGINEERING UNITS OFF LOW HIGH DEVIATION FALSE TRUE ENGINEERING UNITS ERCENTAGE OF ENGINEERING RANGE ERCENTAGE OF ENGINEERING RANGE NON INVERTED INVERTED OFF 1 2 5 10 15 20 NO ALARM SENSED DETECTED LATCHED 4 20 0 20mA RETRANSMISSION PRESET ENGINEERING UNITS ENG
28. TER AND c JUMPOUT the waveforms is based upon the same raw input A By setting the Jumpout band just greater than the noise level the filtering is switched off for any change in actual signal In this way a compromise between heavy filtering and signal response can be reached The following options are available nonE No jump out filter in operation all of the time 1 PEr Jump out band 1 of engineering range 5 PEr Jump out band 5 of engineering range Page 43 INPUT MENU PROGRAMMING 10 PEr Jump out band 10 of engineering range Note that 1 of engineering range for thermocouples is 20 degrees and for RTDs is 10 degrees default setting 1 PEr SQ ROOT PROCESSED PU POWER 3 2 g POWER 5 2 4 2 2 12 Cond Input conditioning for Current and Voltage ranges This feature is available for Voltage and Current inputs only and enables the user to specify one of the following input characteristics This characteristic s then applied to the Raw input N The five options are LinEAr Linear relationship no conditioning USEr User defined characteristic See 4 2 2 13 S root Square root Law See 4 2 2 14 root 32 Power 3 2 See 4 2 2 15 INPUT MENU Page 44 PROGRAMMING root 52 Power 5 2 See 4 2 2 15 default setting LinEAr 4 2 2 13 User linearisation OUTPUT SCALED IN ENGINEERING UNITS IN 1 ae IN 3 4 5 67609101112 13 INPUT SCALED IN ELECTR
29. TRUMENT 32 IHSTRUMEHT 2 IHSTRUMEHT 3 INSTRUMENT 33 E RX TX 3 5 4 GROUNDING PROBLEMS Each instrument has an internal link which connects the comms Ov to unit ground If this causes any problems it may be removed Warning Do not remove the Earth strap from the instrument as this could potentially leave the instrument in an unsafe condition COMMUNICATIONS Page 24 USER GUIDE Page 25 PROGRAMMING 4 0 PROGRAMMING THE INSTRUMENT The unit is a microprocessor based instrument which enables it to satisfy a wide variety of applications through re programming The diagram below shows schematically the operation of the instrument PROGRAMMABLE MENUS SENSOR OUTPUT Tja MICROPROCESSOR SLOT 1 OUTPUT DISPLAY SLOT 2 The programming of the instrument is central to its operation effecting the way the inputs are processed how the outputs are handled and what is displayed This section is divided into two parts the first is a tutorial guide to show how to use the programming menus the second documents the complete menu contents TUTORIAL Page 26 PROGRAMMING 4 1 PROGRAMMING TUTORIAL GUIDE Before starting with the Tutorial it is useful to understand that the unit has three operating modes These are DISPLAY PROCESS VARIABLE MODE MENU MODE EDIT MODE THE DISPLAY PROCESS VARIABLE MODE is the principal mode of operation From here the Process Variable is displayed and all ot
30. With respect to Pin 1 or Pin 5 Page 79 APPENDIX B APPENDICES APPENDIX C TROUBLESHOOTING 1 UNIT IS COMPLETELY DEAD 1 1 Check supply voltage is present on the rear connector 1 2 Check that supply voltage corresponds with voltage stated on the top of the instrument 1 3 Consult service manual for instructions on replacing internal fuse 2 INCORRECT READING 2 1 Check that the unit is set up for the correct sensor type 2 2 Check that the Engineering range has been set correct for voltage and current and correct units for temperature sensors 2 3 Check that thermocouples have correct compensation cable and the polarity is correct 2 4 Check that all three wires are connected properly for an RTD 3 UNDER OVER RANGE 3 1 Check that the sensor wiring is correct 3 2 Check that voltage current sensor is not open circuit 3 3 Check that the unit is set up for correct sensor APPENDIX C Page 80 APPENDICES 4 ERROR CODES Several error codes may appear due to the internal self checking of the instrument These indicate serious faults which cannot be rectified by the user In the event of these codes being displayed the unit should be returned to the supplier The Error Codes are as follows Err 01 Err 02 Err 03 Err 04 Err 05 Err 06 Err 07 Non Volatile memory failure Ram decode error Ram size unrecognised Input card Error EPROM Checksum error RAM fault Calibration data corruption fault
31. all electrical connections There are two output slots into which the user may fit a range of options including relays current re transmission and voltage output boards In addition there is also a communications board slot allowing up to 30 units to be directly networked together to a host computer OUTPUT SLOT 1 OUTPUT SLOT2 SENSOR INPUT BACK PLATE SUPPORT COLD JUNCTION POCKET POWER CONNECTOR EARTH STRAP A schematic of the unit showing internal power supplies and possible options is shown below SUPPLY a LO B N Page 5 2 0 UNPACKING Please inspect the instrument carefully for signs of shipping damage The packaging has been designed to afford maximum protection however we can not guarantee that undue mishandling will not have damaged the instrument In the case of this unlikely event please contact your supplier immediately and retain the packaging for our subsequent inspection Check that the following items are included with the instrument Note that if there are output options included there will be additional connectors SENSOR INPUT SOCKET LEN SUPPLY Page 6 SG4 2069 04 INSTALLATION Page 7 SAFETY INFORMATION THIS SECTION FOR USE BY COMPETENT PERSONNEL ONLY WARNING WARNING ISOLATION WARNING READ SAFETY INFORMATION BELOW BEFORE INSTALLATION Hazardous voltages may be present on the terminals the equipment must be installed by suitably qualified person
32. ay as the View Peak display except that the INC key is used and the minimum Process Variable value displayed 5 1 4 RESET PEAK VALLEY amp CLEAR LATCHED ALARMS Pressing the CYCLE and INC keys simultaneously performs two independent functions It sets the Peak and Valley values to the current Process Variable value and it also clears any latched alarms USER OPERATION Page 70 OPERATION 5 2 INSTRUMENT OPERATION This section describes how the instrument processes input data and activates outputs The diagram below shows the sequence of processing DISPLAY INPUT PROCESSING COND ERROR ITTONING FILTERING DETECT ION OUTPUT CONTROL 5 2 1 INPUT PROCESSING The electrical input is read in and converted to a digital value corrections are made for offset and drift Readings are made ten times a second 5 2 2 SIGNAL CONDITIONING This process depends largely upon the menu programming If the input is a temperature sensor the temperature characteristic is linearised here If the input is a voltage or current the conditioning will be Linear Square root Power Law or User defined as programmed in the Inputs menu 5 2 3 FILTERING The programmable filter reduces noise from the conditioned input Page 71 INSTRUMENT OPERATION 5 2 4 ERROR DETECTION The instrument and the input is checked for a range of faults 5 2 4 1 OPEN CIRCUIT This is only checked for temperature sensors If an
33. d the thermocouple mV rtn T 5 connection with the device mu in p 3 3 4 Pt100 RESISTANCE TEMPERATURE DETECTORS RTDs These detectors are for platinum resistance inputs Pt100 to BS1904 or DIN 43760 three wire RTDs should be connected using three identical wires in order that measurement errors due to lead wire resistances can be eliminated The connections should be made as shown in the diagram opposite If it is necessary to use a two wire sensor then it should be connected across pins 2 and 4 with a link added between pins 4 and 5 It must be noted however that this configuration will suffer from inaccuracies due to the total series resistance of the wiring Page 15 THREE WIRE Pt 100 SENSOR INSTALLATION 3 3 5 TRANSDUCER BRIDGE INPUT A transducer bridge requires two sets of connections A power supply and bridge output The bridge output is treated as a millivolts signal and connected between pins 4 and 5 as in the diagram below Note that the power supply could be from the units bridge excitation output option or an external power supply TRANSDUCER BRIDGE SENSOR CONNECTIONS Page 16 INSTALLATION 3 4 WIRING THE OUTPUT OPTIONS This section applies to optional outputs fitted to the instrument There are four types of output option available Change Over Relay Dual Relay Current Retransmission and Programmable voltage Output These options may be fitted to either slot in any c
34. e the number will be right justified For example 1234 567 will be displayed as 1234 57 Although the electrical input is updated ten times a second the display is updated at the more visually practical rate of three times a second INSTRUMENT OPERATION Page 72 OPERATION 5 7 INSTRUMENT FAULTS The instrument continuously checks itself for correct operation Detection of a fault causes an error message to be displayed The error messages are as follows Err 01 Non Volotile memory failure Err 02 RAM decode error Err 03 RAM size unrecognised Err 04 Input card error Err 05 EPROM checksum error Err 06 Ram Fault Err 07 Calibration data corruption fault burn SENSOR BURNOUT ERROR Open circuit RTD Any one of the three wires Open circuit Thermocouple Cold junction thermistor temperature out of bounds Cold junction thermistor electrical fault OvEr UndEr INPUT SENSOR FAULT Sensor over range Sensor under range Open loop current circuit RTD short circuit Open circuit mV User non lin function out of bounds If an error message is displayed first remove power and re apply If the error condition remains the instrument should be returned to the supplier Page 73 INSTRUMENT APPENDICES APPENDIX A FITTING OF LEGEND IDENTIFICATION A standard sheet of legends is supplied which may be used for the engineering units being displayed The selected legend should be carefully cut from the overall sheet marked wit
35. e SEtP SETPOINTS submenu This submenu is provided as a quick means of modifying setpoints Only the setpoint values are available to be changed The availability of the setpoints depends upon the output options fitted The logic directing this is discussed in detail in section 4 2 3 under the Output submenu section With this in mind it should be taken that any or all of the setpoints 1 to 4 could be unavailable and therefore removed from the submenu If all setpoints are unavailable then the entire submenu is occulted The submenu is represented as follows In each case the editable value is the setpoint in engineering units The number of decimal places for this field is defined by rES in the Inputs menum see 4 2 2 5 The default value for all setpoints is zero Page 35 SETPOINT MENU PROGRAMMING 4 2 2 The INPUt submenu This submenu is used to program all the characteristics of the input sensor and any signal conditioning that may be required The selection of an option in the list may effect items further down Therefore during programming the user should start at the top of the menu and work down to avoid setting an option which may later become obsolete For instance if a temperature sensor is selected then there is no requirement to select the engineering range The structure of the Input menu is represented in the following diagram INPUt sensor frame bres H H Heee sa oa er INPUT MENU Page 36 PROGR
36. ed to control the Alarm operation However it has not been programmed into non volatile memory within the instrument so when power is removed it will be lost and on powering the instrument again the original setpoint value will be restored The next example shows how programmed data is stored to non volatile memory EXAMPLE 3 ACTION APPENDIX E Page 86 APPENDICES Although at the start of this section it was stated that there are two types of message a Data Request and a Data Imposition there is strictly a third type This message has the same format as a data imposition except no data is transferred and it has the effect of making the instrument do an action In this case the action is to save all of the settings to non volatile memory The MASTER sends the following sequence Again device 2 receives the message which is initially treated as a Data imposition PC MASTER TO SLAYE DEVICE S DATA STORE The ds mnemonic is taken as an instruction to do a data store to non volatile memory An index or data is superfluous and is not included On doing a data store an acknowledge is issued as shown below THE CONTROL CODES Page 87 APPENDIX E APPENDICES Up to now the control codes have broadly been ignored although the function of most of them is probably self evident from the above examples These will be explained in more detail here The control codes have two functions First of all they provide markers t
37. ens sena bruce beensspeetdceusouve nssenoess bese sceesseseesaoseseosecosnuscazeccs tqpvesewarceueccenca DEVIATION ALARM SETPOINT 50 DEVIATION BAND 5 ee ee HYSTERESIS 1 44 B ppcceceaseesancaasooseccanssonsncanusncadncoesooss cosuscasnsconscesonsenasessasoncsoosnnesansocsenennensencesscocnndthguocsascsnconesscouscensecannsensnfeacscocaccasssoneccesscencncsoncecsa Pec Naaman HVSTERESTS BAND ix A e ALARM TRIGGERS T IME gt 4 2 3 1 5 DEv Deviation band This option will only appear if the alarm action is set for deviation and it signifies the amount as a percentage of the engineering range that the input variable may vary before the alarm condition is activated This is illustrated in the example below The deviation alarm creates two alarm trigger points one above and one below the setpoint The trigger points are equally distant from the setpoint This is known as the deviation band and is a percentage engineering range OUTPUT MENU Page 52 PROGRAMMING Each of these trigger points may be regarded as an upper and lower setpoint and as such the operation of the hysteresis is as on individual upper and lower setpoints Note that 1 deviation represents 20 degrees Centegrade for a thermocouple and 10 degrees Centegrade for an RTD default setting 0 00 ALARM POWER ON POWER OFF OPT ION e F Z EE 1 3 CLOSED 2 3 OPEN 1 3 CLOSED 2 3 OPEN 1 3 CLOSED 2 3 CLOSED 1 3 CLOSED 2 3 CLOSED NO ALARM
38. ent output options If fitted the following menu will be available from the Output menu 4 2 3 2 1 SPAN Output current span Span is the current range at which the output board is to operate The options are 4 20mA Output current will vary from 4 20mA 0 20mA Output current will vary from 0 20mA 0 10mA Output current will vary from 0 10mA Page 55 OUTPUT MENU PROGRAMMING Default setting 4 20 4 2 3 2 2 tyPE Type of output operation This determines the type of operation The choices are either fixed programmable output or current retransmission based upon the process variable The options are rEtrAN Retransmission of the input PrESEt Constant preset output Default setting rEtrAN 4 2 3 2 3 lo low retransmission range This is the engineering value at which the current output will be at its minimum value either 0 or 4mA depending upon the span setting The value is entered as an engineering value Default setting 0 0 4 2 3 2 4 hi high retransmission range This is the engineering value at which the current output will be at its maximum value 20mA or 10mA See the diagram below for an example of the operation of this feature Note that it is acceptable for the hi range to be less than the 10 although both must be within the span of the input engineering range Note that the current output is limited to the extremes of the current range selected Default setting 100 0
39. es 53 G UNDER RANGE 0 to 100 Similarly as the millivolts reduce from 0 to 100 the Rate falls from 0 0 to 50 0 This relationship is shown on the following diagram On all ranges a 7 overhead is allowed on the scale before the unit detects an out of range signal If the input signal is out of range at the positive end of the scale OVEr is displayed instead of the Process Variable If out of range at the negative end Under is displayed Note that it is quite acceptable to have a reverse acting engineering range where LO will be greater than HI This method of setting the engineering range may also be used for removing gain or offset errors from the system being measured INPUT MENU Page 40 PROGRAMMING Note that the maximum value that may be entered is 64000 default setting LO 0 0 HI 100 0 4 2 2 9 brnout Temperature Sensor burnout Burnout enables the user to select up scale Hi or down scale Lo burnout condition This is available for thermocouple or RTD sensors only and effects the operation of all alarms and output options When a temperature sensor is detected to be open circuit the burnout comes into operation forcing the Process Variable up scale or down scale burn is shown on the display in place of the Process Variable display The options are Hi High scale burnout Lo Low scale burnout default setting Hi The factors which can cause a burnout error are any of the following Thermocoup
40. g edited The flashing entry is most likely to be currnt This means that the Input sensor type was previously set to monitor current inputs Press the CYCLE key until SENSor is displayed and then press SHIFT This item is changed by pressing the INC key The choice of options available will be found to be as follows INC INCrement the edit options around until Volts is displayed flashing Note that whilst the display is flashing the option on the display has not been saved to memory Page 31 TUTORIAL PROGRAMMING To select an option the ENTER key sequence s used Now press ENTER The display will be seen to stop flashing momentarily before returning to Menu A mode Instead of returning back to the SENSor entry rANgE will now be displayed The system has automatically stepped on to the next entry to speed the process of programming ENTER This method of editing parameters is repeated broadly throughout the menu structure with the exception of programming number fields which will be dealt with next The method of editing a field is a bit different though as easy as for any other entry As before we will see it through an example Cycle around the Inputs menu until Hi is displayed This is the engineering high range value although its function is unimportant in the tutorial it simply provides a numeric field to edit As before pressing SHIFT takes us into the edit mode The
41. h any appropriate plant tag or identification and pushed gently into the slot provided in the bottom right hand corner of the front panel of the instrument see drawing below These legends may be subsequently removed by means of a sharp pin in the notch provided The Legend sheet is included with the instrument LEGEND WINDOW APPENDIX A Page 74 APPENDICES APPENDIX B TECHNICAL SPECIFICATION INPUT PERFORMANCE 20 C Type Nominal range Resolution Accuracy TCK 270 to 1200 C 0 1 C 1 C TCJ 210 to 760 C 0 1 C 1 C TCT 270 to 400 C 0 1 C 1 C TCR 0 to 1750 C 0 5 C 2 TCS 0 to 1750 C 0 5 C 2 C TC E 0 to 650 C 0 5 C 1 C TC F 0 to 600 C 0 5 C 1 C TC N 0 to 1300 C 0 5 C 1 C TC B 1000 to 1800 C 0 5 C 3 C Cold Junction 0 to 50 C 0 1 C 1 C Pt100 200 to 800 0 05 C 0 1 0 1 10volts 10V to 10V 0 004 0 02 1 5volts IV to5V 0 008 0 04 Ivolt IV to lV 0 004 0 02 100mV 0 1V to 0 1V 0 004 0 02 4 20mA 4 to 20mA 0 004 0 1 0 20mA 0 to 20mA 0 004 0 1 0 10mA 0 to 10mA 0 004 0 1 Transmitter excitation voltage 19V Maximum transmitter excitation current 25mA Page 75 APPENDIX B APPENDICES ADDITIONAL INPUT SPECIFICATION Input Average Type Acquisition Rate T C 6 8Hz mV 8 9Hz Volts 8 9Hz Current 8 9Hz Pt 100 1 7Hz Cold junction see T C Isolation Power Supply Output Options Comms Interface Input impedance Thermal drift RTD current per C IM
42. he following range of options 2 2 volts output 2 5 2 volts output 3 2 volts output 3 5 2 volts output 4 2 volts output 4 5 2 volts output 5 2 volts output 6 2 volts output 7 2 volts output 8 2 volts output 9 2 volts output 10 2 volts output 12 2 volts output Page 59 OUTPUT MENU PROGRAMMING 15 2 volts output 20 20 volts output default setting 2 Volts 4 2 4 SyS System parameters submenu This submenu allows access to all of the system based parameters such as passwords and communications facilities The system submenu is as follows 4 2 4 1 PASS Password submenu SYSTEM MENU Page 60 PROGRAMMING This provides access to the password submenu The password facility provides protected access to the submenus within the root menu The level of password protection works progressively down the menu This submenu is itself protected with a password The message ENtEr PASS will be displayed before displaying the password template This will be shown as four zeros with the leading zero flashing This may be edited as an ordinary numeric field The password should be entered Pressing ENTER with the correct password takes the user into the submenu shown above An incorrect password displays ACCESS dEniEd before returning to the point of entry 4 2 4 1 1 CodE Password code This entry allows the user to modify the password code The current password is shown as an editable numeric entry Passwords are fo
43. her modes are accessed The unit will always time out back to this mode from any other mode of operation THE MENU MODE gives the user access to the programmable parameters within the unit It is called a Menu Mode because the parameters are arranged in lists according to their type THE EDIT MODE is entered into from the Menu Mode and allows the user to inspect or modify a parameter value Page 27 TUTORIAL PROGRAMMING 4 1 1 KEY DEFINITIONS All programming is done using the three front panel keys How these Soe keys are used to program the SHIFT instrument is shown in this tutorial The functions of the keys are A summarised as follows The black ESCAPE symbols indicate the keys to press Shaded keys indicate that the keys ENTER should pressed simultaneously CLEAR 4 1 2 GETTING INTO MENU MODE The Menu mode is accessed from the Display PV mode by pressing the following sequence of keys ENTER A CycLe The display will now show SETPt In order to understand what this means the following diagram shows where we are within the basic or Root menu structure OUtPUt SETPOINTS INPUT OUTPUTS SYSTEM CAL IBRAT ION SUBMENU SUBMENU SUBMENU SUBMENU SUBMENU TUTORIAL Page 28 PROGRAMMING 4 1 2 1 MOVING AROUND THE MENU We can browse through the other items in the Root menu by pressing A eveLE Subsequent presses of Cycle moves the menu position from right to left on the previous diagram of the
44. le S type thermocouple E type thermocouple F type thermocouple N type thermocouple 5550 u B type thermocouple Default setting CA 4 2 2 4 UnitS Temperature sensor units This item is only available if a temperature sensor has been selected that is either a thermocouple or an RTD The two options are dEg C Degrees Centigrade dEg F Degrees Fahrenheit Switching between these two has the effect of changing the engineering range between Degrees centegrade and Degrees Fahrenheit Default setting dEg C INPUT MENU Page 38 PROGRAMMING 4 2 2 5 rES Engineering units display resolu tion This option defines the number of decimal places displayed for the process variable There are four options 8888 No places of decimal integer value 888 8 One place of decimal 88 88 Two places of decimal 8 888 Three places of decimal Note that the Low and High engineering range adopts this resolution as do the Rate setpoints so consideration needs to be given to appropriate resolution for the required application It is advised that the number of decimal places is set before the engineering range is programmed There are five digits allocated for all engineering values so the number of significant figures must fit within this field If there are more significant digits than can be displayed the number will be right justified default setting 888 8 One place of decimal 4 2 2 6 CJ
45. le open circuit Cold junction thermistor temperature out of bounds Cold junction thermistor electrical fault Any RTD wire becoming open circuit Page 41 INPUT MENU PROGRAMMING 4 2 2 10 FiltEr Input filtering or smoothing If an input is particularly noisy it is possible to filter out noise using this programmable feature There are eight filter values which may be selected These filter 108 ta a UNFILTERED FILTERED INPUT 2 SECOND TIME CONSTANT 2 SECONDS factors represent the time it would take a step change in an input value to reach approximately 63 of its final value The following filter factors are available nonE Filtering switched off 0 5 SEC Filter Factor 0 5 seconds 1 SEC Filter Factor 1 second 2 SEC Filter Factor 2 seconds 4 SEC Filter Factor 4 seconds 8 SEC Filter Factor 8 seconds 16 SEC Filter Factor 16 seconds INPUT MENU Page 42 PROGRAMMING 32 SEC Filter Factor 32 seconds default setting 2 SEC Also see jump out in section 4 2 2 11 4 2 2 11 JP out Filter jump out This sets the change in input value expressed as a percentage of full scale below which the filter operates and above which the filter is inoperable This enables the indicator to respond quickly to large changes whilst filtering smaller noisy signals The diagram below shows the operation of the Jumpout on a filtered input Each of NO FILTER NO JUMPOUT FILTER NO JUMPOUT FIL
46. m LO to HI as the electrical input is increased but the response will be a square root rather than Linear see the diagram below The bottom 1 of the range is made to reflect equivalent linear value times 10 to avoid the near infinite gradient at zero The Process Variable is set to Low engineering range for all negative electrical inputs INPUT MENU Page 46 PROGRAMMING PROCESS HI VARIABLE ENGINEER ING RANGE ESHER RATE Lo ENGINEERING RANGE ELECTRICAL INPUT MV 166 4 2 2 15 Power 3 2 5 2 law The root 3 2 and root 5 2 characteristics are for specific applications For example calculation of Flow Rate from rectangular and V notch weirs require these non linear corrections The operation of the characteristic is the same as for square root except that the bottom 1 is not made linear the response is as follows Page 47 INPUT MENU PROGRAMMING 4 2 3 OUTPUT SUBMENU Output NOTHING FITTED LEd 1 LEd LEd 3 LED 4 DUAL RELAY rly 2 rly 3 C O RELAY rly 1 EXCITATION Vprogl Uprog3 CURRENT OUTPUT There are two types of outputs namely digital relays or analogue which are available as options Each of the two output slots can contain either of these options The processor identifies which options are present on power up and invokes the appropriate programming menus accordingly Entry into the outputs menu presents a list of submenus relating to the output cards fitted The conditions determini
47. nel and mounted on an enclosure providing protection to atleast IP20 The power supply terminals and associated internal circuitry are isolated from all other parts of the equipment in accordance with BS EN61010 1 for connection to a Category II supply pollution degree 2 Functional isolation 500v max is provided between input and output circuits and between inputs and communications where fitted Any terminals or wiring connected to the input output or communications terminals which are accessible in normal operation must ONLY be connected to signals complying with the requirements for Safety extra low voltage SELV circuits If not installed in accordance with these instructions protection against hazards may be impaired Installation overvoltage category 2 as per BS EN61010 1 If this equipment is to be used in environments with overvoltage category 3 transient suppressors should be installed on wiring greater that SOVAC or 75VDC The Mains supply to the equipment must be protected by a 1Amp fuse and a suitable switch or circuit breaker which should be near the equipment The equipment contains no user serviceable parts Page 8 MECHANICAL INSTALLATION When installing the instrument into the panel the following dimensions should be taken into account CUTOUT Femnm x 44mm p 9 mm The unit is held in the Panel by two metal clamp bars on diagonally opposite corners fitted from the
48. ng the availability of submenus is summarised below OUTPUT MENU Page 48 PROGRAMMING 4 2 3 1 Relay alarms and LED alarms submenus The submenus for the Relay and LED alarms are shown below Note that the only difference in content between them is there is no SENSE option in the LED submenu This is because the SENSE option relates to the activation of a Page 49 OUTPUT MENU PROGRAMMING relay and is therefore irrelevant if no relay is fitted Both types of alarms activate a discrete LED on the front panel of the instrument if triggered although this is all a LED alarm does hence its name 4 2 3 1 1 ActlOn Alarm action This programs how the alarm is to operate The options are oFF Alarm inactive Lo Low alarm Triggers when PV goes below setpoint Hi High alarm Triggers when PV goes above setpoint dEv Deviation alarm See Deviation band 4 2 3 1 5 Default setting oF F 4 2 3 1 2 LAtch Latch enable for an alarm The options for this are FALSE Latch disabled trUE Latch enabled When Latch is enabled the alarm remains set once triggered even when the Process Variable has returned to a non alarm condition A non latching alarm is self resetting when the alarm condition is removed CLEAR Pressing CLEAR from the Display Process Variable mode clears a latched alarm if not in an alarm state Default setting FALSE 4 2 3 1 3 SEtP Alarm Setpoint This entry allows the user
49. ns are 75 75 baud SYSTEM MENU Page 62 PROGRAMMING 150 150 baud 300 300 baud 600 600 baud 1200 1200 baud 2400 2400 baud 4800 4800 baud 9600 9600 baud Default setting 9600 4 2 4 3 2 dEviCE Network device number It is possible to multidrop up to 99 instruments on one network The device number allocates a unique device reference for each individual unit Note that without suitable buffering there is is a hardware limit of 30 instruments Default setting 1 4 2 4 3 3 tyPE mode of Comms operation There are two modes of Comms operation possible If the unit is to be operated within a network or a host computer accesses selective data then Slave mode is used The other mode simply outputs a complete ASCII status report consisting of the process variable and the state of any alarms or output options It is possible to dump this data to a dumb terminal or to a printer The options are SLAVE Slave mode ASC OP Ascii output report mode Page 63 SYSTEM MENU PROGRAMMING Default setting SLA VE 4 2 5 CALIb Calibration submenu This submenu which will always have password protection provides access to enable the total or partial recalibration of the System Casual access into this submenu is therefore discouraged CALIBRATION MENU Page 64 PROGRAMMING Do not enter the CALIB submenu unless you know exactly what you are doing If the calibration settings are di
50. o indicate the start of the message and separate the different types of data with the message And secondly they provide integrity checking of the message The lt SOH gt Start of Header control code will always be the first character in the message This indicates that the Header will follow and has a value of 01 The lt STX gt Start of Text character indicates that the Header information has finished and the Text or main body of the message will follow this has a value of 02 The lt ETX gt End of Text character indicates the end of the end of the main part of the message and the Block check character will follow The End of Text character has a value of 03 The lt BCC gt has not got a fixed value like the other control codes as it is a calculated value based upon a modulo 256 sum of all non control code characters in the message This is calculated for each message before it is transmitted and the receiver confirms that a repeat calculation of the message results in the same block check value If there has been any corruption in any part of the message the block check character and the recalculated value will not tie up If an instrument receives a corrupted message it is ignored It is up to the writer of PC software to determine what the MASTER does in such a situation The Block check character is for the message in example 1 is calculated as follows 30 32 3F 43 48 30 30 30 Total 1BC Modulo 256 least significant byte
51. ombination There is however a restriction when using Programable Voltage Output with the Current Retransmission card or another Voltage Output The combined maximum current should not exceed 50mA the supply capacity of the Output options Another consideration with a pair of analogue output options Voltage or Current is that although there is 500V isolation from the Input there is no isolation between output slots See safety information on page 8 3 4 1 RELAY OUTPUTS option 1 and 2 There are two types of relay outputs available Dual relay and Change Over relay The dual relay board has two independent contacts sharing the same common The Change over relay has a single contact with a Normally Open and Normally Closed output available The power off state of the Dual Relay is normally closed but may be changed if required by modifying hardware links on the board POWER SUPPLY FIT FOR DC INDUCTIVE LOADS gt SUPPRESSOR NETWORK 1262 1pF It is recommended that a proprietary suppressor network is fitted as close as possible to the inductive load DC inductive loads should also have a reverse biased diode connected as shown Page 17 RELAY OUTPUT INSTALLATION The contact states both these types of relays are summarised in the table below POWER OFF 1 3 2 3 1 3 eid 1 3 eid 1 3 eid CLOSED OPEN CLOSED OPEN CLOSED CLOSED CLOSED CLOSED POWER ON HO AL
52. s 48 x 96 x 140mm Mounting Panel cutout 91 to 92 mm x 43 to 44 mm Terminals All two part captive screw terminals Weight 850g i The accuracy values represent spread from nominal Unless otherwise stated represents the percentage of full scale value ii represents percentage of reading in stated units iii Represents the valid thermistor temperature range used for measuring Cold junction temperature Slight internal warming from the unit means that temperature is 3 or 4 C above ambient iv Average taken over a second time frame Acquisition defined as complete refresh of electrical sensor value including readings to compensate for gain and offset errors v Cold junction accuracy includes thermal tracking error temperature measurement error and linearisation error This should be added to the individual thermocouple accuracy to get an overall accuracy value vi represents percentage of full scale value vii Input is measured correctly within a small margin outside the normal range This is 7 for bipolar electrical inputs Current inputs that go down to zero do not under range otherwise all other sensor inputs have a 7 over under range margin vii This may be extended with suitable buffering ix There is an internal 10M ohm pull down resistor to 2 5V This is only significant for high source impedance mV inputs x 50mV and 100mV respectively xi 1V and 10V respectively xii
53. s but greater than 100mV it is connected to the Voltage input Any voltages greater then 10 volts may still be measured but must be divided down first Each of these cases is discussed in more detail below 3 3 1 1 MILLIVOLTS INPUT This input accepts signals up to 100mV in normal operation The signal source must be connected to pins 4 and 5 as shown opposite SENSOR CONNECTIONS Page 12 INSTALLATION 3 2 1 2 VOLTAGE INPUT This input pin can take voltages up to 10 volts The signal should be connected between pins 3 and 5 as indicated 3 2 1 3 VOLTAGES GREATER THAN 10 VOLTS In order for these to be measured correctly it is necessary to connect some simple external circuitry outside the unit to divide down the voltage to a nominal maximum of 10volts This is done using a resistor divider chain as shown in the diagram below The choice of resistors are given as the nearest preferred values to those calculated in the equations for R1 and R2 below It is possible to correct for any errors in the divide down chain by making R2 a trimmer or correct by adjustment of scale range Care must be taken to insulate any high voltages to protect from electric shocks or damage to any other equipment a x 100K T 16 109K Page 13 SENSOR CONNECTIONS INSTALLATION 3 2 2 CURRENT INPUTS There are two types of current measurement possible the first type measures the current of an external loop that is a current that
54. sturbed it may be necessary to return the unit to the factory The submenu may alter with the fitting of various output options but is represented as follows 4 2 5 1 OFFSET Input offset adjustment This is a numeric value in engineering units which is added to the Process Variable value in order to take out any system offset errors This should be used with care as INPUT SOCKET CURRENT OUTPUT SOCKET there is no indication in the Process Variable display mode that this offset is being applied and is thus capable of introducing an inadvertent error Default setting 0 0 FNTER 4 2 5 2 CAL 1 to CAL 10 ESCAPE Input calibration These are used to calibrate the input system Not recommended for users 4 2 5 3 CLcUr1 3 Calibrate Current o p board Page 65 CALIBRATION MENU PROGRAMMING If the Current Output Board is to be fitted in the unit by the user it is necessary to use this entry to calibrate the option Connect up the Current output board to the Sensor input board as shown below INPUT VOLTAGE OUTPUT SOCKET BRIDGE EXCITATION SOCKET Press ENTER to commence automatic calibration ENTER Note if the display reads either siglo or sighi recalibrate the output card again On completion ESCAPE back to the Process Variable display mode This stores the calibration information in non volatile memory A ESCAPE 4 2 5 4 CLvoP1 3 Calibrate Bridge excitation board CA
55. t no bare wire protrudes from tle the rear of the power connector risking N a short circuit A L E N POWER SUPPLY POWER SUPPLY Page 10 INSTALLATION 3 2 WIRING PRECAUTIONS The unit can accept a variety of sensor inputs some of which produce very small voltages Therefore it is advisable to adhere to the following rules of good installation pratice e Do not install close to switchgear electromagnetic starters contactors power units or motors e Do not have power or control wiring in the same loom as sensor wires e Check power supply voltage is the same as printed on the label attached to the unit e Check wires especially the power supply voltage wires are not loose before switching on the unit e Use screened cable for sensor wiring with the screen earthed at one end only e Follow the wiring instructions in this manual 3 3 SENSOR CONNECTIONS All sensor connections are made via the five way socket at the rear of the unit as shown below SENSOR INPUT Page 11 SENSOR CONNECTIONS INSTALLATION All sensor connections are summarised in the diagram below 4 26 EXTERNAL EXTERNAL RESISTOR 3 3 1 DC VOLTAGE INPUTS The unit has two individual voltage inputs One supports millivolt inputs up to 100mV and the other voltage inputs up to 10 volts If the voltage input to be measured is to be no greater than 100mV it is connected to the millivolts input If the signal is less than 10 volt
56. the transmit lines from the units are connected together This means that only one unit can transmit at a time without clashing the signal For this reason the communication software in the instrument s only responds to messages issued by the PC No messages are generated spontaneously by the units in this way the PC maintains control over the network Thus the PC is regarded as the MASTER and the units on the network are SLAVES Page 83 APPENDIX E APPENDICES The other problem obvious from the above schematic is that even though the MASTER transmits to all of the SLAVES simultaneously only one may respond otherwise signals will clash together This is arranged by allocating each SLAVE unit a unique address This address is called the device number and is programmed into the unit before it is connected to the network by programming the CO NET parameters menu within the SYS menu See the programming section for details The comms messages issued by the host can be one of two types Data Request MASTER requests data from a SLAVE Data Imposition MASTER writes data to a SLAVE The most convenient way to describe these message types is to show an example for each message type It is not important to understand the full detail of the message at this stage as this will be covered later however the following control code definitions will probably be useful lt SOH gt Start Of Header lt STX gt Start Of Text lt ETX gt End Of Text
57. to program the setpoint value This is entered in engineering units This can also be set from the SEtP menu see 4 2 1 which provides a quick OUTPUT MENU Page 50 PROGRAMMING means of adjusting setpoints whilst running Default setting 0 0 ENGINEERING RANGE 6 166 ALARM TRIGGERS SETPOINT 56 6 HYSTERESIS BAND 1 MRD AEN I EREN A AR REI SI ONO TOR RUN ALARM CLEARS HIGH ALARM SETPOINT 56 HYSTERESIS 1 TIME 4 2 3 1 4 HySt Alarm hysteresis or dead band This enables the hysteresis or dead band to be programmed This is the difference between the points at which the alarm triggers and releases and is expressed as a percentage of engineering range For high and low alarms the alarm triggers exactly at setpoint and is removed at the hysteresis level away from the setpoint See example based upon a high alarm below In the case of deviation alarms the hysteresis is applied to each trigger point either side of the setpoint Note that for thermocouples a 1 hysteresis band would be equal to 20 degrees Centigrade and 10 degrees Centigrade for an RTD Page 51 OUTPUT MENU PROGRAMMING default setting 0 00 ENGINEERING RANGE 6 166 ALARM TRIGGERS sasssa ve E EEE E ai annann ai HYST E AND 1 eal NS AT STERESIS BAND ik DEVIATION BAND ALARM CLEARS SETPOINT 56 6 pocoevecediacoscscoce cove snsccuusessvoperessscesn seed sovecnsns sueasove sueonosncotaness sous d
58. ur digits long and can range from 0000 to 9999 default setting 4000 4 2 4 1 2 LEvEL Password start level The password level may be set up to start from any of the following levels SEtPt The passwords apply to all submenus INPUt Passwords start from in Input submenu OUtPUt Passwords start from the Output submenu SyS Passwords start from the System submenu CALIb Passwords apply to the Calibration submenu only default setting CALIb 4 2 4 2 AUtOCy Automatic cycle Autocycle is a parameter which is used to control the way that the menu operation Page 61 SYSTEM MENU PROGRAMMING works If Autocycle is enabled its default state the menu steps on to the next menu entry after each menu item action This is convenient when programming a completely new set of parameters into the unit After each menu item has been programmed the next one is stepped on to There are certain situations however when this is inconvenient Switching the Autocycle feature off Setting it to FALSE will inhibit any automatic stepping There are two possible options trUE Autocycle enabled FALSE Autocycle disabled default setting trUE 4 2 4 3 Co NEt Communications submenu This submenu contains the parameters required for the communications to operate on the unit The submenu is described as follows 4 2 4 3 1 bAud Baud rate This allows the transmit and receive baudrate to be set The optio
59. value on the display will have its most So SHIFT significant digit flashing and represents the value previously entered for the engineering units high range As before the INC key modifies the editable value but this time this will only be the digit flashing This digit is said to be under the edit cursor To move the edit cursor press the SHIFT key A cycLe INC TUTORIAL Page 32 PROGRAMMING The edit cursor moves one digit to the right If the SHIFT key is repeatedly pressed the edit cursor will be seen to wrap around to the most significant digit once more SHIFT Therefore it can be seen how a number may be programmed in this field by selective use of the INC and SHIFT keys We could enter the edited value as done in the previous example but for the purposes of this tutorial we shall abandon the edit This is done using the ESCAPE key ESCAPE sequence Pressing this returns us to the MENU mode showing FiltEr the next item in the Input menu We could go on and program other items within this or other menus using the same principles as we have done in the previous examples Instead we shall return to the Root menu and then back to the DISPLAY PV mode 4 1 4 RETURNING FROM SUBMENUS It has been shown that the method of getting into a submenu is pressing the SHIFT key on a submenu item The reverse operation is to press the ESCAPE key A ESCAPE OUtPUt will now be displayed as

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