Series 2000 Pulse Output Unit User Manual i M42 Issue 1 Series
Contents
1. w owwismumu we w vo a w owwismumu we o wm owwrmwmu w o eo Trew owwsmae ve o m oc ww pwweemorowmns mw e e Response from read or write messages 5 Response from read or write messages The response of the controller to a satisfactory read or write message with the correct address will be as follows unless an address wildcard is used see paragraph 8 3 6 AAPDDDD CR or AAP DDDD CR The instrument will respond with a string of ASCII characters The header will consist of Hex 2A The header will be followed by an address AA showing the address of the responding instrument in ASCII numbers 00 to 99 after the address is a single ASCII character P showing the parameter selected this is followed by a data field of four ASCII numbers DDDD representing the decimal value of the parameter selected This will be preceded by a minus sign if the data is negative The units of the data field are the displayed units of that parameter This is followed by a CR to complete the message return M42 Issue 1 22 Series 2000 Pulse Output Unit User Manual 8 6 8 6 1 8 6 2 Error responses 6 Error responses Two sorts of error in a received message may be detected by the instrument these are Corrupt message response 6 1 Corrupt message response Noise or interference during the transmission of the message causing corruption of one or more ch2. 5 3 Emode parameter groups 3Emode parameter groups The engineers mode scroll consists of a large number of parameters so to improve ease and speed of use the parameters are presented to the user in groups At the start of each group the group name is shown on the lower dispay and the upper display is blank Pressing the star button will gain access to the parameters in that group Pressing the scroll will advance the scroll to the start of the next group If the group is entered by pressing the star button then the group parameters are listed in sequence in the usual way when the scroll button is pressed At the end of the list for that group the group name is displayed again This enables the user to re enter the same group again if required 5 4 Group IP 4 Group IR This group only contains one parameter relating to the instruments input 5 4 1 DAG Input Bias 4 1 DAG Input Bias bIAS is used to set up for live zero input signals and can be set as a percentage between 0 and 25 This allows the input to be scaled for live zero signals such as 1 to 5V In this example 1V being 20 of 5V if bIAS1 were set to 20 then an input of 1V would be taken as 0 and an input of 5V as 100 For true zero inputs set the bias to 0 5 5 Group Cont 5 Group Cont The control group contains the pulse output setup parameters 5 5 1 CHAN Number of pulsed outputs 5 1 CHAN Number of pulsed outputs The value of CHAN should be set to the
3. in place of one or more of the address characters eg W6XJ0100 CR would result in all instruments on the network with addresses of 60 to 69 having their minimum pulse on times set to 10 0 seconds Instruments written to with wildcard addresses do not reply Message parameter code 3 7 Message parameter code The parameter code field of the message is a single ASCII character In a write message this corresponds to one of the control parameters listed in paragraph 8 4 parameter codes Message data field 3 8 Message data field The message data field consists of four ASCII characters and may be preceded by a minus sign if the data is negative These characters represent the decimal value of that M42 Issue 1 Series 2000 Pulse Output Unit User Manual 21 8 4 8 5 parameter in stored units That is if the parameter were specified as being in units of 0 196 and read 0110 then this would indicate a reading of 11 096 Note that there must be four digits in the data field if necessary use leading zeros to pad out a shorter number to 4 digits POU read write parameter codes 4 POU read write parameter codes Each parameter within the POU is assigned a single alpha parameter code These parameter codes are listed in the following table ELEMENT LIMIT X o amp pemmowuw 3 we w owwmwwmue m o e w owwismwwmu we w vo Co w owwismumu Lo w vo w omne smn Im w
4. 0 4800 and 9600 baud Data format 1 start 7 data odd parity 1 or 2 stop bits Implementation 4 wire full duplex Max drivers per line 32 Max receivers per line 32 Max cable length 1200 metres 3937 feet Connections 2 Connections General 2 1 General The series 2000 may be connected to any computer or device which supports the RS422 or RS485 interface standards This includes any other communicating instruments such as the series 1000 or any other instrument using the FGH standard protocol The instrument uses a balanced voltage communications system which will perform well under most situations provided some simple guidlines are observed M42 Issue 1 18 Series 2000 Pulse Output Unit User Manual 1 The communications wiring should be implemented using screened cable containing one or two twisted pairs The cable screen should be earthed at one point only 2 The cable should be routed well away from any sources of electrical noise such as motors contactors and any other high voltage wiring 3 The network should be wired as a daisy chain taking the wires into one instrument and hence on to the next Wiring spurs should be avoided Take care to preserve the continuity of the cable screen throughout the network 4 For long cable runs or noisy environment it may be necessary to fit a terminating resistor to the network The terminator a 220 resistor should be fitted between RX and RX on both the computer and the fur
5. 8V power supply APPENDIX B Fault codesAPPENDIX B Fault codes In the rare event that one of the stored parameters is invalid for example after replacing the RAM or memory back up battery then when power is first applied to the instrument a fault number will be displayed When multiple faults occur the lowest numbered fault is generally shown first Faults should be cleared one at a time until the fault indication disappears This table shows which parameter must be corrected to restore operation Fault number parameter at fault BE Input bias biAS Do nic med ure Ed Number of pulse channels CHAN c EE Channel 1 trim value trn1 AT EEA EOIN AN AA EA AS DATENA Channel 2 trim value trn2 Dita a EE EG Channel 3 trim value trn3 AE E nti Channel 4 trim value trn4 dereen Channel 5 trim value trn5 EE Channel 6 trim value trn6 ENER Channel 7 trim value trn7 dr rr dS e E Channel 8 trim value trn8 jn MEME Mr Minimum pulse on time ton a EE Digital input 1 function DIN1 I AMD Digital input 2 function DIN2 E EE Security password PASS M42 Issue 1
6. ING Digital input 2 function cus fece etis etes stesse ar Er os editt 13 TAE C Odo cd AN Bl Bs ac Ne ing a tl hl hl E 13 5 7 1 Digital serial communications ooo eee ceecseesceseseseesseeeceseeeeseseeeseaeseseesseseeseeeneees 13 Shs Maem EE EE 13 5 9 Group EE EE EE 13 5 9 1 SE ECC E TT 13 5 9 2 PASS and CHGE Setting the password 13 M42 Issue 1 ii Series 2000 Pulse Output Unit User Manual SECTION 6 HARDWARE CONFIGURATION enne ens 14 60 OH Ee 14 6 1 Gaining access to the option boardS nns 14 6 2 Broken input drive selection eesssssseee teinte trente inedita 14 SECTION 7 CALIBRATION RE 15 E Ne E EE 15 V MM EE RTI nea avaaia cane Ea A AE 15 fe El Bee E 15 SECTION 8 SERIAL COMMUNICATIONG ennt 16 8 0 GENERAL DESCRIPTIONS eegene AE 16 Wee PERROS 16 8 1 1 2 Wire EIA 485 Mode RS4B5 coi cccsccsssas decnlocascavtestuceictsasavadensdeddddveasnvauneseastastins 16 8 1 2 4 Wire EIA 422 Mode RS422 REENEN 16 8 2 lt CONMECHONS lt 5 2097125 16 NECI M PE HORAE 16 8 2 2 2 Wire EIA 485 Mode RS485 EE 17 8 3 Connection reference table eeeesssseenece tnter crescent inet 18 8 3 COMMUNICATIONS PROTOCOL eene treten tentent 18 8 3 1 Message CODSITUCHODE EH 18 5 9 2 WIE EE 18 8 3 3 edd TOSSageSs acum ere Ee E ee 18 8 3 4 Message EE siehe 19 8 3 5 InstFUme DE 6 0 6S curs coca a tht Pace Ee oe cione as ox ovi Peta 19 8 3 6 Wildcard Be EE 19 8 3 7 Message param
7. Series 2000 Pulse Output Unit User Manual i Series 2000 Pulse Output Unit User Manual CONTENTS SECTION 1 INTROBDUGTION e i ere ebe EE 1 SECTION 2 INSTALLATION A 2 20 Lu ReloneD 2 2 1 Instrument ee 2 2 2 INPUT Teens gt Geste eege 4 2 2 1 Mains EEN 4 2 2 2 DO e 4 2 2 3 Control Signal E IN EE 4 2 2 4 ee le H Tue DEEN 5 2 2 5 High Level Voltage Input ooo ccccccecccesscecscesttescesecevecsecnaeceesdeeseeeteeescesscesdueedees 5 2 2 6 High level 20MA Re Ein gll EE 5 2 2 7 HE 5 2 2 8 IB s EI Ee 6 2 29 KENNEN HCH 6 2 2 9 1 Connections for computer read write comme 6 SECTION 3 OPERATION EE 3 1 GENERAL 3 3 Front panel indications 3 4 Normal Operation 3 5 Using the keypad SECTION 4 EE 9 4 Modifying dala EE 10 4 2 LONG SCROLL ELEMENTS ice b e aie eec reg 10 4 3 PASSWORD PROTECTION bueren eebe ien ees 10 4 3 1 Password entry esu cec essentia dete ust MM I e epa ML LU 11 SECTION 5 SOFTWARE CONFIGURATION ooo enr enrennrennn 11 O SNCS C DET 11 Dede SE lee c EE 11 DA OCO K Ode eeben ME er ERR EA e MAL SEE E 11 5 3 Emode parameter Qroups ccccccscccecscecssecececceedeceecescecsedesceesceesceesesesceesocesctessees 12 MERC CUN exc 12 5 4 1 IAS Input EE REESEN 12 co Ma Cg ito CEET 12 5 5 1 CHAN Number of pulsed outputs 12 5 5 2 ton Minimum pulse on me 12 el 5 246 UE 12 5 6 1 INT Digital input 1 function s asi oae uiii enu neue atat euh Ca 12 5 6 2 G
8. The input signal is always interpreted by the instrument as a percentage 0 to 100 but a live zero offset may be set up in the engineers mode scroll Low Level Voltage Input 7 O 0 to 90mV VOLTAGE Input signals in the range O to 90mV may be connected o INPUT directly to the instrument as shown positive to IN1 pin 22 negative to IN2 pin 23 and ING pin 24 High Level Voltage Input SIGNAL For high level voltage or non standard current inputs an qg O external signal conditioning board is supplied This provides 1 the necessary shunts or dividing components to convert from the high level input signal down to the 0 to 90mV signal required by the instrument High level 20mA Current Input 2 6 Hi Inpu For 20mA current inputs a precision 100Q shunt resistor is 21 fitted internally between terminal 20 and 24 The incoming 99 20mA current signal should be connected to between these two 33 terminals Link out terminal 21 and 22 and terminals 23 and 24 24 Bins M42 Issue 1 2 2 7 2 2 8 2 2 9 Series 2000 Pulse Output Unit User Manual Pulsed outputs 2 7 Pulsed outputs The pulse outputs are open collector devices designed to 4 COMMON drive solid state relays SSRs 5 CHANNEL 1 6mA Nominal directly V 10V max 6 CHANNEL 2 Each channel output is capable of 7 sinking up to 10mA from the Se common positi
9. ameters can be viewed but not modified SECTION 5 SOFTWARE CONFIGURATIONSECTION 5 SOFTWARE CONFIGURATION 5 0 General 0 General The POU is capable of being configured to suit the users system All that is required to produce a POU customised to a specific application is to set up the number of output channels required and the minimum pulse duration to suit the output actuators used 5 1 E Mode E Mode EI mode or Engineers mode is used to configure the instrument and modify seldom used parameters It is also used for calibration To enter E mode remove the instrument from its sleeve by undoing the two screws visible on the instrument front panel The instrument should now withdraw smoothly It will now be seen that on the left hand board is a two way DIL switch Push down switch 2 The instrument may now be replaced in its sleeve The instrument is now in E mode reset switch 2 to off to return the instrument to normal operating mode 5 2 Lock mode 2 Lock mode Next to the E mode switch is the LOCK switch The purpose of this switch is to provide a means of protecting the parameters in the long scroll from unauthorised tampering If the switch is on then no long scroll parameters can be modified from the front panel until the switch is turned off In other words the LOCK mode works as if a password had been set M42 Issue 1 12 Series 2000 Pulse Output Unit User Manual and could not be satisfactorily answered
10. aracters so that it was no longer valid The receiver within the instrument detects this and as long as it was not the address that was corrupted the instrument responds as follows AAC CR where AA is the address of the instrument responding C Pfordetected parity error F for detected overflow error O for detected receiver overrun Syntax error response 6 2 Syntax error response Messages that were correctly received but don t make sense as long as the address part was o k generate the following response 2 AANN lt CR gt where AA address of the instrument responding NN two digit ASCII HEX error code Error code binary weightings bit7 Illegal trailer bit6 Tx buffer overflow bit5 Illegal number of characters bit4 Illegal data bit3 Illegal parameter code bit2 Rx buffer overflow bit1 Illegal header bitO Write to read only parameter M42 Issue 1 Series 2000 Pulse Output Unit User Manual 23 APPENDIX A Part number codingAPPENDIX A Part number coding The part number consists of two parts the instrument type eg M2806 and supply voltage code No of channels 2108 ARCEA EEN Supply Voltage H 24 to 48Vdc Blank 88 to 265Vac Example 1 M2806 34 2PP This describes a six channel pulse output unit with serial communications and a 88 to 265V ac power supply Example 2 M2805 34H 2PP This describes a five channel pulse output unit with serial communications and a dc 24V to 4
11. cts the instrument address required between 0 and 99 Bear in mind if it is desired to address groups of instruments simultaneously by use of the wildcard address then the address must be selected accordingly see section 8 5 8 Group CAL 8 Group CAL This group contains the instruments calibration adjustments See section 7 for futher information 5 9 Group PASS 9 Group PASS 5 9 1 Passwords 9 1 Passwords The POU is equipped with password protection enabling the long scroll parameters to be protected against unauthorised access The essence of the password is a four digit code representing a sequence of four button presses When the password is being entered any of the six front panel buttons are valid they are assigned values 1 to 6 with the left button as 1 and the star button as 6 When initially set up the POU has its password set to 0000 This is the clear condition when this is set then NO password protection is provided 5 9 2 PASS and CHGE Setting the password 9 2 PASS and CHGE Setting the password M42 Issue 1 14 Series 2000 Pulse Output Unit User Manual PASS The upper display shows the current password or 0000 if the password is clear CHGE To change or clear the password set the ALTER parameter as follows no Don t change the password CLR Clear the password ie turn off password protection yES Change the password Press the scroll button to perform the action requested If yES was selecte
12. d then PASS is now displayed and the new password should be entered by pressing your selection of four buttons SECTION 6 HARDWARE CONFIGURATIONSECTION 6 HARDWARE CONFIGURATION 6 0 General 0 General The Pulse Output Unit is capable of being configured in many ways and expanded using option cards Only the option cards required for performing the desired task are fitted and waste is therefore minimised 6 1 Gaining access to the option boards 1 Gaining access to the option boards In order to gain access to the option boards the instrument must be removed from its case This is achieved by unscrewing the two captive screws on the front panel the instrument may then be drawn out from the case The instrument consists of two main boards attached to the display assembly Each board is held in place by two clips at the display board end these clips should be gently eased apart if a board is to be removed On the power supply board are the three input output slots slots 1 to 3 The pulse output board is a triple width card and occupies all three of the slots 6 2 Broken input drive selection 2 Broken input drive selection The input circuitry on the power supply board provides provision for broken input drive selection This facility is only applicable to low level voltage input signals Current and high level input signals have inherent down scale drive when the input signal is absent The broken input drive direction is selected by bri
13. dging one of the two solder pads shown M42 Issue 1 Series 2000 Pulse Output Unit User Manual 15 CPU BOARD M42 Issue 1 16 Series 2000 Pulse Output Unit User Manual SECTION 7 CALIBRATIONSECTION 7 CALIBRATION 7 0 General 0 General The following procedure enables the POU input to be calibrated in the field if the reference equipment is available The reference equipment consists of a precision voltage current source with an accuracy of at least 10 times better than the instrument 7 1 Preparation 1 Preparation The environment in which the instrument is to be calibrated should be clean and dry with a temperature between 15 and 25 C humidity 0 to 80 Rh non condensing The instrument and any reference sources being used to calibrate it should have been in the calibration area and switched on for at least an hour prior to calibration 7 2 1 Main input span 2 1 Main input span Connect the precision voltage or current source to the main input terminals and place the instrument into E mode by removing the instrument from its sleeve and setting the EMODE switch to ON and replacing the instrument in its sleeve See para 5 1 Scroll on to the SPAN parameter in the CAL group Set the precision voltage or current source to deliver 90 000mV or 20 000mA full scale input signal as appropriate and using the up and down keys adjust the input span until the display just changes from 99 9 to 100 0 When satisf
14. e output pulses provides the necessary air turbulence within the furnace or kiln to ensure a better temperature distribution and reduce the peak gas demand FURNACE Co Zone 1 lt gt gt gt Zone 2 C Zone 3 S gt gt Zone 4 C Zone 5 S gt gt Zone 6 Temperature OP Pulse Controller Output Unit MV DZone 7 K n n RR UE GAS Co Zone 8 TC M42 Issue 1 2 Series 2000 Pulse Output Unit User Manual SECTION 2 INSTALLATION SECTION 2 INSTALLATION 2 0 Panel Cutout 0 Panel Cutout The instrument will fit into a DIN standard 92mm 40 8 Omm high by 45 0 6 Ommwide cutout and will accommodate a panel thickness up to 15mm The instrument projects behind the panel by less than 150mm 48mm 16 omm H y k 150mm j PANEL CUTOUT 92 o mm k 46 He mm To fit the instrument into a panel first unhook the two panel clamps from the slots in the case H IP65 sealing is required then the gasket provided must be fitted now See Instrument sealing below If IP65 sealing is not required then the gasket is not required and the instrument case may now be inserted through the panel cutout Hold the case against the panel and hook the panel clamps into the slots provided along the body of t
15. eter code eseeseee certet cene tre smt Dese rates drea 19 8 3 8 Message data field us ore usta i ve s ato Erro IEEE ER 19 8 4 POU read write parameter codes sessi NENNEN NEEN 20 8 5 Response from read or write MESSAGES ooo cece cee cece ceeeeeeeeeeeeeseeseeseseeeeeeaeeeaees 20 8 6 Error responses oirrese eh dee dee 20 8 6 1 Corrupt message response 21 8 6 2 Syntax error response TE 21 APPENDIX A Part number coding ANEN 22 APPENDIX B Fault codes 22 M42 Issue 1 Series 2000 Pulse Output Unit User Manual 1 SECTION 1 INTRODUCTIONSECTION 1 INTRODUCTION The FGH Pulse Output Unit POU is an eight channel control unit designed to split an analog control signal from a conventional temperature controller into the digital signals required to sequentially switch solid state relays This is typically used to control pulsed gas burners The POU can handle between two and eight outputs simultaneously and provides the ability to trim each channel output individually Each output in the system is pulsed in sequence to reduce the peak power demand The figure below shows how the pulse outputs are sequenced EIGHT CHANNEL SYSTEM AT 5096 INPUT Minimum on time 10 sec CHAN 1 CHAN 2 CHAN 3 CHAN 4 CHAN 5 CHAN 6 CHAN 7 CHAN 8 0 10 20 30 40 TIME SECONDS A typical application for the pulse output unit is the control of gas burners Each pulse output is connected to one burner zone The sequential nature of th
16. f each of the pulse outputs one to eight A bar shown in the up position indicates that the output is currently on and in the down position that the output is currently off 3 4 Normal Operation 4 Normal Operation The POU powers up into its normal display mode This mode simply shows the measured control input as a percentage on the upper display Under special circumstances the top display may show one of the following messages depending on how the digital inputs have been configured COOL flashing The pulse outputs are reverse acting pulse outputs decrease with increasing input signal PurG All of the pulse outputs are forced to be on M42 Issue 1 Series 2000 Pulse Output Unit User Manual 9 3 5 Usingthe keypad 5 Using the keypad The scroll is used to select parameters in the scroll When this button is pressed the next parameter in the scroll list is selected in turn Eventually when all of the available parameters have been displayed the scroll will wrap around to the first parameter The up and down buttons adjust the value of the scroll parameter selected When the button is pressed the parameter value is changed by one at first but then at an increasing rate This makes it easy to make large changes quickly SECTION 4 LONG SCROLLSECTION 4 LONG SCROLL The long scroll is a sequence scroll of parameters Only relevant parameters are held in the long scroll so as the setup of the instrument change
17. he case using a screwdriver tighten the two clamp screws until the clutch mechanism starts to slip The instrument should now be clamped against the panel and the sealing gasket if fitted is compressed M42 Issue 1 Series 2000 Pulse Output Unit User Manual 3 2 1 Instrument sealing 1 Instrument sealing Each instrument is provided with a sealing gasket in a separate bag This is used to seal the instrument bezel against the mounting panel to achieve sealing to the IP65 standard To use this gasket remove it from its bag and place it over the body of the instrument before fitting the instrument into the panel Take great care to place to gasket squarely round the body of the instrument before passing it through the panel cutout The instrument may now be fitted into the panel as described by the installation instructions above Additional measures will be required to seal multiple instruments if they are mounted in a common slot These measures may consist of sealing compound or other devices at the discretion of the installer M42 Issue 1 4 Series 2000 Pulse Output Unit User Manual 2 2 INPUT CONNECTIONS 2 INPUT 7 CONNECTIONS All connections are made to the instrument SUPPLY S POE at the rear terminal block Each terminal is 4 capable of accepting up to two 1mm cables 5 Keen with ferrules 6 gt INPUTS To gain access to the terminals undo the py se 7 two captive
18. ied press the star key and note down the displayed calibration constant for future reference this is a hexadecimal number Return the instrument to its normal operating mode by setting the EMODE switch to off M42 Issue 1 Series 2000 Pulse Output Unit User Manual 17 SECTION 8 SERIAL COMMUNICATIONSSECTION 8 SERIAL COMMUNICATIONS 8 0 8 1 8 1 1 8 2 8 2 1 GENERAL DESCRIPTION 0 GENERAL DESCRIPTION The FGH POU is equipped with serial communications as standard This takes the form of 2 way serial assynchronous communication with a computer Messages consist entirely of ASCII characters and may or may not contain spaces as desired All messages are terminated with a carriage return CR The serial communications interface may be wired to conform to the 2 Wire EIA 485 RS 485 or the 4 Wire EIA 422 RS422 standards Specification 1 Specification 2 Wire EIA 485 Mode RS485 1 1 2 Wire EIA 485 Mode RS485 Balanced digital multipoint communication system Transmission standard EIA 485 RS 485 Data rates 1200 2400 4800 and 9600 baud Data format 1 start 7 data odd parity 1 or 2 stop bits Implementation 2 wire half duplex Max drivers per line 32 Max receivers per line 32 Max cable length 1200 metres 3937 feet 4 Wire EIA 422 Mode RS422 1 2 Aire EIA 422 Mode RS422 Balanced digital multipoint communication system Transmission standard EIA 422 RS 422 Data rates 1200 240
19. number of channels that the POU is required to drive from 2 to 8 5 5 2 ton Minimum pulse on time 5 2 Ton Minimum pulse on time This parameter controls the minimum on pulse width which is directed to any particular channel The value entered is in seconds between 1 0 and 20 0 5 6 Group dinS 6 Group dinS The digital inputs group allows the user to set up the function of the two digital inputs 5 6 1 dIN1 Digital input 1 function 6 1 ONT Digital input 1 function Digital input 1 may be configured to reverse the sense of the pulsed outputs M42 Issue 1 Series 2000 Pulse Output Unit User Manual 13 If the dIN1 parameter is set to COOL and the digital input is made then the pulse sense will be reversed ie for 10096 input signal all the channel outputs will be off 5 6 2 dIN2 Digital input 2 function 6 2 diN2 Digital input 2 function Digital input 2 may be configured to override the input signal and switch all the channel outputs on If the dIN2 parameter is set to PURG and the digital input is made then all the channel outputs will be forced on This input overrides any other function within the instrument 5 7 Group Coms 7 Group Coms 5 7 1 Digital serial communications 7 1 Digital serial communications The POU is equipped with digital serial communications as standard and requires setting up using the following parameters bAUd selects the baud rate required 1200 2400 4800 9600 Baud Addr Sele
20. on 8 With careful installation communications distances of up to 1200 metres should be possible See section 8 for the different modes of connection M42 Issue 1 Series 2000 Pulse Output Unit User Manual 7 SECTION 3 OPERATION SECTION 3 OPERATION 3 1 3 2 PULSE OUTPUT UNIT FRONT PANEL Instrument Release KSE Screw Status Indicators 82000 MAN TUNE REM M LI IL111 Lower Display Scroll Button Star Button Instrument Release C Screw GENERAL 1 GENERAL 4 Main Display ERE EE Up Button Down Button The POU is designed to be flexible in application and yet straightforward to use This section provides all the information needed to operate it once installation and commissioning are complete Software version 2 Software version When power is first applied to the instrument the main display shows the letters FGH while the lower display shows the model number and software version number This display is replaced after a few seconds with the usual one described below M42 Issue 1 8 Series 2000 Pulse Output Unit User Manual 3 3 Front panel indications 3 Front panel indications The large main display usually shows the value of the measured control signal input in percent There is one status indicator at the top of the display which flashes TALK when the POU is transmitting via the serial comms port The lower row of status lamps shows the current state o
21. ppear in the long scroll In any particular installation only those parameters which are applicable will actually appear in the scroll MNEMONIC MEANING PASS Password entry Press the four key password sequence and then scroll in order to modify any following parameter trn1 The trim value for channel 1 in percent This parameter is used to adjust the channel 1 output value to between 80 and 120 of the measured control input value and so on up to trn8 The trim value for channel 8 in percent This parameter is used to adjust the channel 8 output value to between 80 and 120 of the measured control input value PASSWORD PROTECTION 3 PASSWORD PROTECTION The POU is equipped with a versatile password protection system which when used correctly protects the instrument against an unauthorised person changing the settings The setting of a password is explained in section 5 but the following is included here to assist the operator if a password has been set M42 Issue 1 Series 2000 Pulse Output Unit User Manual 11 4 3 1 Password entry 3 1 Password entry If a password has been set then on entry to the long scroll the password screen will be seen At this point the sequence of four button pushes representing the password should be entered The instrument will then briefly display Good or bad depending on the correct password being entered and then enter the long scroll Unless the password is correctly entered par
22. s so too will the contents of the long scroll Refer to section 4 2 for a complete list To enter the long scroll press and hold the right or left button After a couple of seconds the display will change You are now in the long scroll To return to the normal operating display press and hold the right or left button again for a couple of seconds Alternatively if no buttons are pressed for 20 seconds then the instrument will automatically revert to the normal operating display In the long scroll each parameter has a unique mnemonic which is shown on the lower display when that parameter is being examined Each press of the right or left button will scroll forward or backwards through the list M42 Issue 1 4 1 4 2 Series 2000 Pulse Output Unit User Manua Modifying data 1 Modifying data The up and down buttons are used to change the value of the current parameter displayed There will often be limits to the parameter being modified and it will only be possible to change the value of the parameter within these limits If a parameter contains illegal data for example when the configuration is changed then when that parameter is viewed the upper display consists of all bars to show this Pressing the up or down buttons clears this and allows the parameter to be set to the desired value LONG SCROLL ELEMENTS 2 LONG SCROLL ELEMENTS 4 3 The following list gives all the parameters which may a
23. screws in the rear terminal OUTPUTS lt x r ds 10 SENSOR 11 12 WARNING ISOLATE THE INSTRUMENT FROM MAINS VOLTAGE BEFORE REMOVING THE TERMINAL COVER TO GUARD AGAINST ELECTRIC SHOCK TAKE PARTICULAR CARE TO ISOLATE ANY HIGH VOLTAGE SIGNALS WHICH MAY HAVE BEEN CONNECTED TO THE INSTRUMENT Ensure that mains power wiring is routed separately to low voltage signal wiring This is to avoid the possibility of electrical noise affecting the instruments performance Never run these two groups of cables together in the control cabinet or anywhere in the plant 2 2 1 Mains Power 2 1 Mains Power The mains power supply 88v to 264v A C is connected to terminals 2 and 3 EARTH is connected to terminal 1 This is safety earth and is connected to the metal case of the instrument 2 2 2 DC Power 2 2 DC Power The DC power supply 24V to 48V is connected to terminals 2 PWR and 3 PWR and is internally fused at 500mA EARTH O NEG A good earth should also be connected to terminal 1 as for EAD Sav de O POS the AC power version WARNING Instruments designed for on DC power supplies will be damaged if connected to mains voltages M42 Issue 1 Series 2000 Pulse Output Unit User Manual 5 2 2 3 2 2 4 2 2 5 2 2 6 Control Signal input 2 3 Control Signal input The pulse output unit can accept a variety of differing input signals including current and live zero signals
24. thest instrument For two wire networks this resistor should be fitted at the computer end only Only one such resistor should be fitted on each wire pair 8 2 2 2 Wire EIA 485 Mode RS485 2 2 2 Wire EIA 485 Mode RS485 This diagram shows the connection for RS485 mode Note the use of screened cable This connection method may be extended further to other instruments up to the maximum allowed zoom To D nm D me o 13 Uu Ine Computer Renan M42 Issue 1 Series 2000 Pulse Output Unit User Manual 19 8 3 Connection reference table 3 Connection reference table Instrument Function EIA 485 EIA 422A Terminal TX RX TX NC or NC or SCREEN SCREEN 83 COMMUNICATIONS PROTOCOL 3 COMMUNICATIONS PROTOCOL 8 3 1 Message construction 3 1 Message construction Messages to and from the POU vary in form depending on amongst other things the type of message and its contents 8 3 2 Write messages 3 2 Write messages Write messages to the instrument take the following form WAAPDDDD or WAAP DDDD where W write message header AA instrument address P parameter code DDDD numeric data preceded by if negative messages to the instrument may have the fields separated by spaces These spaces will be ignored Messages from the instrument however will not contain spaces Eg W 45B 0100 CR will attempt
25. to write 10096 to channel 1 trim value as well as W45B0100 lt CR gt The CR at the end of the message is a carriage return Hex OD Each message written to the instrument must be terminated with and each message from the instrument will be terminated with a carriage return M42 Issue 1 20 Series 2000 Pulse Output Unit User Manual 8 3 3 8 3 4 8 3 5 8 3 6 8 3 7 8 3 8 Read messages 3 3 Read messages Read messages to the instrument take the following form RAAP where R read message header AA instrument address P parameter code to be read from Again the message must be terminated with a lt CR gt and spaces may be included if desired Message header 3 4 Message header This may be ASCII R signifying a Read ASCII W signifying a Write The R header is used whenever data is being read from the instrument When this header is used the data field is absent The W header is used to write data to the instrument Instrument address 3 5 Instrument address Each instrument must be given a unique address between 0 and 99 This is set when the instrument is in E mode The address field of the message consisting of two ASCII characters determines to which instrument the message is directed The S1600 ignores the message unless it corresponds to its own address Wildcard addresses 3 6 Wildcard addresses If desired a group of instruments can be written to together by using a wildcard character large X
26. ve supply when the 8 _ CHANNEL 4 output is switched on a CHANNEL 5 The diagram opposite shows the 10 CHANNEL 6 typical wiring to one of the eight 11 CHANNEL 7 output channels 12 CHANNEL 8 Digital inputs 2 8 Digital inputs All POU versions can accept two digital inputs Ge DIGITAL input 1 is connected to terminal DI 1 18 and input 9 NOTE 2 connected to terminal DI 2 19 The common for both C NUTS inputs is terminal DI COM 17 IN OFF INPUT 2 POSITIONS COMMUNICATIONS 2 9 COMMUNICATIONS The serial communications option can be configured to communicate with a host computer 2 2 9 1 Connections for computer read write comms 2 9 1 Connections for computer read write comms The POU serial port uses the EIA 485 RS485 or EIA 422 communications standards This means that a host computer may communicate directly with up to 32 instruments S1600 1000 or S2000 etc over a simple network at up to 9600 Baud Since the communications distance may be considerable up to 1 2km and the environment noisy it is important that the network is wired correctly For the best error free operation the communications cables should be screened run in its own conduit and separated as far possible from other high voltage cabling Each end of the network should have a terminating resistor value 220R fitted between RX and RX see secti
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