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PT Board - Barchard Engineering Ltd.

1. 1042 TOC Pulsing Gas 874 0 1043 TIB Fault 875 0 1044 TIB AlarmOutput 876 0 1045 TOG Normal Alarm 877 0 1046 TOG Abnormal Alarm 878 0 1047 AccuTest Accuracy Alarm 826 0 LZ Alarms shown above may not be implemented in all versions of Mercury Instru ments CZ Reserved Future use ER 0 returns a value of 0 for the specified Register 44 www honeywell com Honeywell 5 Archive Data Desription The PT Board s handling of Archive Log data is designed to meet the specifications deter mined by ENRON Corp per the document Specifications and Requirements for an Elec tronic Flow Measurement Remote Terminal Unit 1995 5 1 Modbus Archive Registers Description Register Value range Alarm amp Event Data 32 see Alarm Event Structure Daily Archive Data 703 see Daily Structure Hourly Archive Data 704 see Hourly Structure Daily Archive Index 7160 1 35 Hourly Archive Index 7161 1 840 E Alarm Event Counter 7162 1 100 resets after Acks 5 2 Archive Data Updating The PT Board can retrieve Audit Trail data records from the Mercury Instrument on an hourly 60 min cycle The PT will attempt to retrieve the Log Data at 1 minute after the top of the hour according to the Instrument s time Upon connection the PT will retrieve any new Archive historical data from the Instrument 5 2 1 Enron Log Variant 5 item records Once an hour 5 Audit Trail Items 258 259 2
2. 06 and 16 Start Register value is configurable with Item Register Offset Reference to 1 is selected by disabling Register Offset By 1 Reference to 0 is selected by enabling Register Offset By 1 4 3 3 Register Sizes Floats 32 Bits per single Register Float data stored in one Register Example Register 7002 used for Pressure readings Register 7003 used for Temperature readings 16 Bits in two consecutive Registers both MSB and LSB 1st options supported Float data stored in two consecutive Register Example Register 7002 amp 7003 used for Pressure readings Register 7004 amp 7005 used for Temperature readings ENRON compliant host systems should choose the 32 bit Register size option MODICON compliant host systems should choose the 16 bit MSB or LSB Register option See Section 3 4 3 42 www honeywell com Honeywell 4 4 Register Cross Reference for Boolean Items Listed below is a listing of the Mercury Boolean Items Alarms with their corresponding Modbus Register number Modbus Register 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 Mercury Item Description Reserved P1 Pressure High Alarm P1 Pressure Low Alarm Reserved T1 Temperature High Alarm T1 Temperature Low Alarm Reserved PLog P2 Pressure High Alarm PLog P2 Pr
3. Active At A Time Only one of the three Host Interface Serial Ports J2 J3 or J4 may be used at a time The Host must terminate the current communications session before a different Host Inter face Port or Protocol can be utilized no concurrent serial port activity allowed Protocol switching is allowed on all three Host ports For example the Host can talk Modbus protocol on serial port J4 and then switch to Mercury protocol after the Modbus session ends The communications session is normally terminated by a Sign Off message from Mercury protocol or from the configurable inactivity time out when using Modbus protocols 2 Interface Connections 2 1 Connection Description The Mercury Protocol Translator PT Board has three serial ports for connections with a Host SCADA system There are two ports for interfacing with a Mercury Instrument Host Serial Interface Ports J2 2 wire RS 485 for multidrop connection 2 pin screw terminal J3 3 wire RS 232 for local connection 6 pin header J4 5 wire RS 232 for modem connection 5 pin screw terminal Instrument Serial Interface Ports J5 3 wire RS 232 4 pin header ECAT ER Mini Mini AT J6 3 wire CMOS 3 pin header Mini Max Sentry ERX PA LZ Only 1 port J5 or J6 may be used in an application Power Supply J7 VBatt DC supply 3 pin header J8 VBatt DC supply 3 pin header Either J7 or J8 can be used second connection is a spare Flash Progr
4. Archive Record Structur uuuuissmsumienmsstsununsienud iver 47 5 5 2 Daily Archive Record Ed ie 47 5 6 Mercury Archive TENTS anser ie Ee Se Ee ee DER Rae ee ese Ee 48 5 6 1 Hourly Archive Record Structure see esse esse ee ee ee ee ee ee ee ee ee ee ee 48 5 6 2 Daily Archive Record Gtruchure ENEE 49 Section D Diagnostic Help Specifications FW Upgrading 6 LED aile ie EE EO SE NE ENG EE SE NG 51 6 1 Start up S RO N Ee EL ce ee OE 51 6 1 Communications Status ee ee ee ee ee ee 52 7 Selup Basics uuamusueasnasnssesssavmaunadnjijevjv hvad 53 7 1 PT connectiOnS ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 53 7 2 PT initial ere UI e ses ede SE EE Re es de oes Ke Be Ke Re 53 8 Problem ctheeks Jaaa 54 8 1 Instrument Interface 54 8 2 Host Intertace nn nnnnnnrnnennnnnnennennnennennnennennnsennennennsennen 54 CRT 55 10 Firmware Upgrading i s isi GENE GE SR RANG EN i EK e Res sein id GN Ne NSR ek kes ee an 57 6 www honeywell com Honeywell Section A General Description and Connections 1 Overview 1 1 General Desription The Mercury Protocol Translator PT Board is an adapter board that is connected be tween the Mercury Instrument and a Host SCADA system This manual is intended to support only Modbus protocols This device is designed for operations with a dedicated Mercury Instruments measur ing device to allow communications with Modbus SCADA systems The PT Board will translate the Host s protocol to an
5. N Ke ne Rede Re RE mi 8 2 Interface e TE 10 2 1 Connection Descriptions ee 10 2 2 Gonnection Layo t gege 11 2 3 Connections to a Mini AT and Modem 12 2 4 Connections to an EC AT and Modem iese esse ee ee ee ee ee ee 13 2 5 Connections to an ER and Mode esse SERE KERN ideen Re see see ee Re Ge ees 14 2 6 Connections to a Mini MAX ERX or PA and ModeM sesse se ee ee ese ee 15 Section B Configuration and Operation 3 Contig ring The PT Board ia ae MR ERNA ke wa n GE ES ENG AO NE ek ana 17 3 1 PT Config Softawre OvervieW sesse sesse ee ee AA ee ee ee ee ee ee AA ee 17 TT PT Config S eee 18 3 2 Host PT Inieriaee E 19 3 2 1 Host RE 20 3 2 2 Always active port Ed N ARE Rd Ee ee ER N Ke RR ns Ed ee ee 21 9 23 Protocol Detect Hu EE 22 3 2 4 Modem Control Mode 22 3 3 PT Instrument Interface 23 3 3 1 Instrument Baud hale is sb nd es ee ek es n se ge Re 24 3 392 EE Nede 24 3 3 3 Instrument Access Code RR RR RR RR RR Re Re 25 4 www honeywell com Honeywell 3 3 4 AT Modem Hangup Enable esse see ees ee ee ee ee ee ee ee ee ee ee ee ee 25 3 3 5 Instrument Call in Enable enn 25 Eelere e EE EE ee ee EE GE EE Ee ee ee ten 26 3 4 1 Modbus Protocol Tpe ENEE 28 3 4 2 Device Address elavel Ae 28 3 4 3 Register Data Formal Ede sees ENEE ee ee ke 28 3 4 4 Inactivity TMC GU EE ER EE OE EE eines 29 JA KOSS LAE er 29 3 4 6 Time Date Format ee 29 3 4 7 Communications Fommat 30 3 5 Modbus Register MaBDINd se
6. for Modbus Protocol LZ Confirm the J5 J6 Baud rate matches the Instrument s baud typically 9600 bps 9 Confirm the Instrument Type selection is proper for the corresponding Instrument LZ Confirm the JMP 2 jumper is installed in the correct position for the corresponding Instrument port used J5 or J6 See Section 2 8 2 Host Interface Confirm the Host system s baud rate matches the PT Boards J2 J3 J4 baud rate s depending on port used amp Confirm a valid Modbus Starting Address True Modicon systems transmit a Modbus Starting Address value of 1 less than the user s selection e g Host sends 6999 when user has indicated 7000 for the Start Address Possible resolve to this problem enable PT Item Reference To Zero Alternatively the Host controller can handle this offset by setting the Starting Address 1 higher than the desired value e g use 7001 for 7000 See Section 3 5 54 www honeywell com Honeywell 9 Specifications 1 Power Supply 5 to 16 0 V DC operations Designed for battery operations or with supplemental power supply Active mode current 15 20 mA 7 5 VDC Power down mode current 40 60 uA 7 5 VDC oe ee O 9 2 Host Interface serial ports RS 485 port J2 for half duplex multidrop connections 2 wire D RS 232 port J3 for local serial connections 3 wire interface for field serial communications etc RS 232 port J4 for modem serial connections
7. ports On slow communicating system it may be necessary to increase the Protocol Detect Time out value to 15 20 seconds to prevent the PT Board from timing out early LZ Typical value should be 15 20 s 3 2 4 Modem Control Mode J4 Port Options only for J4 Serial Port e Normal Mode Data sent without wait delays default setting Use this option for standard modems types that do not require RTS signal control Only a 3 wire interface is used in this mode TxD RxD and Gnd e Delay For CTS The response is not sent until a CTS signal is detected or until the CTS Time out expires The PT Board will assert the RTS signal and wait for a responding CTS See J4 CTS Time out Use this option for modems that require Transmitter enabling and that use CTS feedback If CTS is not available set CTS Time out to lowest value acceptable by modem data will always be sent to modem after the time out expires RTS and CTS signals must be connected properly between the PT Board and the modem e Radio Keying Before data is sent to host RTS signal is asserted The response is not sent until a 150 ms time out has expired regardless of CTS Use this option for MDS radios that require Transmitter Keying RTS signal wire must be connected properly between the PT Board and the modem J4 CTS Timeout configurable in seconds depending on modem 1 60 www honeywell com Honeywell 3 3 PT Instrument Interface The P
8. 5 wire interface to modems radios etc 9 3 Instrument interface serial ports One 1 RS 232 port via J5 One 1 CMOS port via J6 9 4 Operating temperature D 40 F to 165 F 40 C to 75 C 9 5 Indicator LEDs Two red 9 6 Memory SRAM for maintaining Archive data separate storage from Instrument E PROM for PT Board configuration settings D FLASH for operating system firmware Programmable via J1 Program Port 55 9 7 Mechanical Open PCB with four 4 mounting holes mount inside a protective enclosure Board dimensions 2 40 x 4 00 inches 9 8 Mounting kits Available for field installation of PT boards for all Mercury Instruments 9 9 Certifications Designed for Class 1 Division 1 amp 2 Group D Consult Mercury Instruments Inc for latest approval ratings 56 www honeywell com 10 Firmware Upgrading PT Board firmware device operating program is stored in flash memory Adding new features and capabilities to the device is simply a matter of uploading a file containing a newer version of firmware through the serial port connection There are no EPROM chips to be removed or plugged into sockets To upgrade flash program memory use Firmware Upgrade Manager software in conjunction with the MPA programming device p n 40 2620 LZ Consult Mercury Instruments customer service to obtain these parts if needed 10 1 Programming steps Connect the MPA to J1 PRGM 10 pin connec
9. 60 261 and 229 are retrieved from the Instrument s Audit Trail log and stored in Modbus ASCII format in the Hourly Archive Array At the Start Time hour 5 Audit Trail Items 230 231 232 233 and 234 are retrieved from the Instrument s Audit Trail log and stored in Modbus ASCII format in the Daily Archive Array 5 2 2 Mercury Log Variant 10 item records Once an hour all 10 items of the Audit Trail are retrieved from the Instrument s Audit Trail log and stored in Modbus ASCII format in the Hourly Archive Array At the Start Time hour 10 Mercury specific Items are read directly from the Instrument and stored in Modbus ASCII format in the Daily Archive Array 45 46 5 3 Daily and Hourly Archive Collection Basic desription on how to collect the Archive data from the PT Board This method is generally employed by Enron EFM based systems Read Register 7160 7161 to obtain current Daily amp Hourly Archive Index values Read Register 703 to obtain each Daily Archive record Read Register 704 to obtain each Hourly Archive record Use Modbus Function Code 03 to read Index and Data records Te Use the Total Registers field to specify the particular record index desired 5 4 Alarm Event Collection r Read Register 7162 to obtain current Alarm Event counter value N Read Register 32 to obtain each Alarm Event record All Alarm data is sent first followed then by all Event data Alarm Event Counter spe
10. Baud 3500 el BPS Protocol Detect Timeout 20 lge R5232 J4 Baud 9600 v BPS JACTS Timeout 5 4 isec RS485 J2 Baud 3500 sl BPS Modem Control Mode Normal Mode zl Always Active Port Power Save zl 3 2 1 Host Baud Rates Listed below are the serial communications baud rate s options for each of the Host interface port J2 J3 J4 Each port is independently configuarble If the port is not used the baud rate setting may be left as is Select the proper baud rate to match the device connecting directly with the PT Board s Host Interface Port i e modem or PG RS 232 J3 Baud Rates RS 232 J4 Baud Rates RS 485 J2 Baud Rates e 1200 bps e 1200 bps e 1200 bps e 2400 bps e 2400 bps e 2400 bps e 4800 bps e 4800 bps e 4800 bps e 9600 bps e 9600 bps e 9600 bps default settings e 19200 bps e 19200 bps e 19200 bps e 38400 bps e 38400 bps e 38400 bps e 57600 bps e 57600 bps e 57600 bps S It is recommended to leave the J3 Port baud set to 9600 for local access and use the J4 amp J2 Ports for SCADA connections modems RTU controllers etc LZ If two SCADA connections are required w RS 232 interface then use J3 and J4 ports and set baud rates as required 20 www honeywell com Honeywell 3 2 2 Always Active Port Options e Power Save default setting This mode allows the PT Board to be powered by an Instrument s battery pack by returning back to ultra low power state after serial communications
11. Honeywell Honeywell Process Solutions Mercury Protocol Translator Board Mercury to Modbus Protocol Interface User Manual October 2010 V 2 32 Honeywell www honeywell com Honeywell Reference Documents Modicon Modbus Protocol Reference Guide Document Number PI MBUS 300 Rev J Specifications and Requirements for an Electronic Flow Measurement Remote Terminal Unit Document Number N A 07 18 1990 Revised 12 05 1994 Enron Corp Functional Specifications for an Electronic Flow Measurement Communications System Document Number N A 09 11 1995 Enron Corp Serial Communications Interface amp Protocol Document Number per Instrument Mercury Instruments Inc Modbus is a trademark of MODICON Inc Prerequisites This guide assumes you have LZ Familiarity with your Mercury Instrument LZ An understanding of the Modbus Host system being employed LZ An understanding of basic data communications concepts FT Al necessary hardware and software including PT Config exe gt This guide assumes you are using one of the following Mercury Instruments Electronic Correctors EC AT Mercor Mini Mini Max Mini AT Turbo Corrector TOC Turbo Monitor TOM Electronic Recorders ER ERX Contents Section General Desription and Connections kee 8 1 1 General SS CHO DEE 8 Ede dae es AE EE OE EE EE OE EE aa 8 1 3Archive Data SUP aged 8 1 4 Protocol DEtesmiINAMOP sesse ERK EN Ne RE EN
12. I D2 LEDs turn Off after inital 2 second startup EEPROM Changed E Host D1 and MI D2 LEDs blink 5 times simultaneously after startup This conditions indicates the PT Items configurations have returned back to factory default settings unit must be re configured per user s options EP After FW upgrades EEPROM may have changed resulting in Blinking LEDs SRAM Changed E Host D1 and MI D2 LEDs blink 5 times in alternating pattern after startup EE This conditions indicates the Archive data has been cleared from the PT Board If Log Mode is enabled the PT Board will restore lost Archive data by reading ALL of the Audit Trail data and Alarm Events if also ennabled from the Instrument 51 6 2 Communications Status The 2 PT Board LEDs are used to indicate the status of communications with the Host system and the Mercury Instrument 6 2 1 Host system comm status Initial Serial Activity Detected E Host LED D1 turns On at 1st sign of serial activity on one of the 3 Host interface ports J2 J3 or J4 Host LED D1 will turn back Off if no valid protocol is detected within the configured Protocol Detect Time out period Host LED D1 being On does not indicate the Host is communicating properly Valid Protocol Detected E MI LED D2 turns On when a valid protocol message is detected Host LED D1 will already be On and remain so at this point Receipt of the ENQ character qualifies for Mercury
13. Item 224 Daily Unc V 6 Item 233 Audit Trail item 9 gt Item 223 Daily Cor V 7 Item 234 Audit Trail item 10 gt Item 190 Daily Energy Properly configured the Mercury Instrument s Audit Trail items using MasterLink32 LZ Data is formatted as 32 bit floating point values for all positions in record 47 5 6 Mercury Archive Items 5 6 1 Hourly Archive Record Structure Position Name Desription 1 Date Log Date 2 Time Log Time 3 Item 258 Audit Trail item 1 4 Item 259 Audit Trail item 2 5 Item 260 Audit Trail item 3 6 Item 261 Audit Trail item 4 7 Item 229 Audit Trail item 5 8 Item 230 Audit Trail item 6 9 Item 231 Audit Trail item 7 10 Item 232 Audit Trail item 8 11 Item 233 Audit Trail item 9 12 Item 234 Audit Trail item 10 Properly configured the Mercury Instrument s Audit Trail items using MasterLink32 Config ure the Instrument s Audit Trail Items listed above with desired Item numbers for the Hourly Archive 7 Use the value 255 for any unused Audit Trail Item Data is formatted as 32 bit floating point values for all positions in record 48 www honeywell com Honeywell 5 6 2 Daily Archive Record Structure Position Name Desription Suggested Item 1 Date Date 2 Time Time 3 Dail Archive Item 1 User selectable Item 1 185 4 Dail Archive Item 2 User selectable Item 2 186 5 Dail Archive Item 3 User selectable Item 3 184 6 Dail Archive Item 4 User selectable Item 4 183 7 Dail Archive Item 5 User selecta
14. T Board has several configuration options for interfacing with various Mercury Instru ments Two port of the PT Board are provided to accomodate both RS 232 as well as CMOS interfacing requirements Each port can have its own baud rate but only one port may be connected to a Mercury Instrument no dual Instrument connections allowed Shown below is a screen shot of the PT Config software screen PT Instrument Inter face Protocol Translator Configuration 1 61 Build 14 File PT Setup Help Elda I Modbus Protocol Modbus AD me Number Instrument J5 J6 Baud 3600 D BPS AT Modem Hangup Enable Instrument Type DS DI I Instrument Callin Enable 23 3 3 1 Instrument Baud Rates Listed below are the serial communications baud rate s options for either of the Instru ment interface port J5 or J6 The baud rate applies to both connection ports J5 and J6 Options o 9600 bps default setting e 4800 bps e 2400 bps 19200 bps 38400 bps 57600 bps Select the proper baud rate to match the Instrument connecting with the PT Board Normally this would be set to 9600 to simplify configurations 3 3 2 Instrument Type Options o EC AT e ER ERX e Mini e Mini AT including AccuTest amp Turbo Correctors default setting e Mini Max Pulse Accumulator and Sentry o Reserved e Turbo Monitor TOM e Generic choose this if no other option available Select the proper t
15. amming Port Firmware Upgrading J1 10 pin header for use with MPA Mercury Programming Adapter Jumper 2 Install shunt across JMP2 Pins 1 2 if Instrument is connected to J5 Install shunt across JMP2 Pins 2 3 if Instrument is connected to J6 www honeywell com Honeywell 2 2 Connection Layout Shown below is the PT Board with indentifiers for connections LEDs and Jumpers GO Ge VBatt1 VBatt2 Instrument Instrument Host DC Power spare RS 232 CMOS RS 485 TRG TRG B A V GND V GND 1 2 4 1 2 1 2 Mo MEG Host Modem RS 232 MPA MI Host Led Led FW Loading Port 2 3 Connections to a Mini AT and Modem Basic Wiring Diagram Including Modem PT Board Gier 40 2655 Local Port case conn Modem Port 3 to 5 wires depending on modem G Rx Tx Modem signals that may need connections to RTS and CTS of PT board RTS CTS DTR DSR DCD RI Telco Line Mini AT Main Board 40 2335 Battery 12 www honeywell com Honeywell 2 4 Connections to an EC AT and Modem Basic Wiring Diagram Including Modem 1728 PT Board 40 2655 Local Port case conn Modem Port 3 to 5 wires depending on modem 40 1674 RS 232 G Rx Tx Modem signals that may need connections to RTS and CTS of PT board RTS CTS DTR DSR DCD RI Telco Line EC AT Main Board 40 1563 Battery Ed racket Conn 2 5 Conne
16. ard per the application requirements as closely as possible Protocol Translator Configuration 1 61 Build 14 SE gt File PT Setup Help sheaSQausg Modbus Protocol Modbus hy eden Number er gt PT Firmware Version R5232 J3 Baud DI BPS Protocol Detect Timeout ad RS232 J4 Baud BPS J4 CTS Timeout Katz R5485 J2 Baud DI BPS Modem Control Mode DI Always Active Port D 3 1 1 PT Config Setup From the Setup menu select the Comm port and baud rate that is needed for communica tions with the PT Board Normally the J3 port of the PT Board is used for configurations and is typically set to 9600 bps PT Board configurations can be done on any of the three Host interface serial ports J2 J3 and J4 Communications Setup Serial Communications Connector Baud Rate ow Ed 3600 z OK Cancel 18 www honeywell com Honeywell 3 2 Host PT Interface The PT Board has several configuration options for interfacing to Host serial ports Each port of the PT Board can have its own baud rate and is able to communicate in any of the stated protocols Mercury Modbus Shown below is a screen shot of the PT Config software screen Host PT Interface Protocol Translator Configuration 1 61 Build 14 File PT Setup Help sHdas2a4a5 I Modbus Protocol Modbus det Ee Number PT Firmware Version 2 3004 RS232 J3
17. ble Item 5 191 8 Dail Archive Item 6 User selectable Item 6 189 9 Dail Archive Item 7 User selectable Item 7 194 10 Dail Archive Item 8 User selectable Item 8 195 11 Dail Archive Item 9 User selectable Item 9 002 12 Dail Archive Item 10 User selectable Item 10 000 Properly configured the Daily Archive items using PT Config software The 10 Daily Archive text boxes are for Item numbers that are to logged in the Daily Archive At the Start Time hour the above 10 Mercury specific Items are read directly from the Instrument and stored in Modbus ASCII format in the Daily Archive Array It is recom mended tp select Items that are Daily by nature Such as Daily Avg Pressure 7 Use the value 255 for any unused Daily Archive Item Data is formatted as 32 bit floating point values for all positions in record 49 Section D Diagnostic Help Board Specifications and Firmware Upgrading 50 www honeywell com Honeywell 6 LED Functions 6 1 Start up Status 7 1 1 Initial power up indication Whenever the DC power supply is applied to the PT Device a CPU self check is per formed Power amp CPU OK E Host D1 and MI D2 LEDs turn On solid for 2 seconds at power up reset 6 1 2 System memory checks Whenever the DC power supply is applied to the PT Device a self check is performed to determine the status of both the SRAM volatile and EEPROM nonvolatile memories of the PT board Memory OK Host D1 and M
18. can be selected if the number of logged data points needs can be up to 10 for both Hourly and Daily Archive records The capacity is 35 days for each Archive Note The Daily Archived data points Items are configured directly from within PT Config shown below The Hourly Archive is configured via the Instrument s Audit Trail Items using MasterLink software Protocol Translator Configuration 1 61 Build 14 File PT Setup Help Gasa I Modbus Protocol Modbus reg Number Host PT Interface PT Instrument Interface PT Logging PT Logging Configuration m Daily Archive Items Log Variant Mercury DI VW Log Mode Enable Alarm Event Log Enable Archive Time Format HH MM SS v 35 36 3 6 1 Log Mode Enable Options L indicates disabled v indicates enabled Select if Historical Archive data is required from the PT Board Modbus format 7 Log Mode Enable must be enabled to obtain Archive data using Modbus protocol Modbus ASCII protocol is required to retrieve the Archive data 3 6 2 Log Variant Options e Enron e Mercury Selects the record size format for Archive data using Modbus ASCII protocol Instrument must be configured for 10 Item Audit Trail logging Enron variant Archive data is obtained solely from the Instrument s Audit Trail log memory The Archive data is updated once an hour 1 min after the top of the hour The Hourly and Daily Archive share the In
19. cifies only the total number of Alarms and or Events 3 Write Register 32 use Func 05 with the value FF00 to acknowledge and clear the Alarm Event output buffer S Use Modbus Function Code 03 to read Index and Data records LZ The Total Registers field is ignored N A suggested value 0001 Special Notes LZ The Mercury Instrument must be configured for a 10 Item Audit Trail LZ The Mercury Instrument should be configured for Disable Serial Log Triggers ea Archived Data records use only 32 bit Register format Modbus ASCII Protocol www honeywell com Honeywell 5 5 Enron Archive Items 5 5 1 Hourly Archive Record Structure Position Name Desription Item Logged 1 Date Log Date 2 Time Log Time 3 Item 258 Audit Trail item 1 gt Item 206 Avg P 4 Item 259 Audit Trail item 2 gt Item 207 Avg T 5 Item 260 Audit Trail item 3 gt Item 225 Interval Unc V 6 Item 261 Audit Trail item 4 gt Item 226 Interval Cor V 7 Item 229 Audit Trail item 5 gt Item 148 Interval Energy Properly configured the Mercury Instrument s Audit Trail items using MasterLink32 Data is formatted as 32 bit floating point values for all positions in record 5 5 2 Daily Archive Record Structure Position Name Desription Item Logged 1 Date Log Date 2 Time Log Time 3 Item 230 Audit Trail item 6 gt Item 256 Daily P 4 Item 231 Audit Trail item 7 gt Item 257 Daily T 5 Item 232 Audit Trail item 8 gt
20. ctions to an ER and Modem Basic Wiring Diagram Including Modem 1728 PT Board 40 2655 Local Port RS 232 case conn RxD Modem Port 3 to 5 wires depending on modem Modem signals that may need connections to RTS and CTS of PT board RTS CTS DTR DSR DCD RI Telco Line ER Main Board Battery 14 www honeywell com Honeywell 2 6 Connections to Mini MAX ERX or PA and Modem Basic Wiring Diagram Including Modem Valid for the following Instrument types ERX Mini Max Sentry and Pulse Accumulator 1728 PT Board 40 2655 Local Port case conn Modem Port 3 to 5 wires depending on modem 40 2790 G Rx Tx Modem signals that may need connections to RTS and CTS of PT board RTS CTS DTR DSR DCD RI Telco Line Mini Max Sentry ERX or PA Main Board Battery Section B PT Board Configuration 16 www honeywell com Honeywell 3 Configuring the PT Board 3 1 PT Config Software Overview PT Config Software is a 32 bit Windows application used to configure the various configu ration parameters of the PT board This application runs under Windows98 or higher PT Config software can be used on any of the PT Board s Host interface ports J2 J3 or J4 Make sure the PT Config s Comm port setting matches the PT board s Host ports baud rate The most important aspect of this manual is to properly configure the PT Bo
21. d from Mercury Protocol so the Host can communicate with a Mercury Instrument in its own native protocol e g Modbus The PT Board handles communications between the Host interface and the Mercury Instrument in a Master Slave type fashion 1 2 Host Protocols MERCURY Serial Protocol MODBUS ASCII 32 bits per register MODBUS RTU 16 bits or 32 bits per register All data is in IEEE 745 32 bit floating point format G 9 DB ed Data is sent in either 16 or 32 bits per Register depending on configuration 1 3 Archive Data Support MODBUS Archive Data Support Implements Enron Corp s method for EFM Archive Data Collection using Modbus ASCII Protocol Enron variant 5 Items logged in every Daily and Hourly archive record 35 days for each Archive type 100 Alarm Events Mercury variant 10 ltems logged in every Daily and Hourly archive record 35 days for each Archive type 100 Alarm Events 8 www honeywell com Honeywell 1 4 Protocol Determination 1 4 1 Automatic Host Protocol Detection The PT Board can automatically determine if the Host system is using Mercury or Modbus protocol Once the PT Device has determined the protocol type Mercury or Modbus it will continue to adhere to this same protocol until the link session with the Host is terminated Mercury and or Modbus Protocols ASCII RTU can be used on any one of the three Host Interface Serial Ports J2 J3 or J4 1 4 2 Only One Host Interface Port
22. end In this mode the PT Board may not respond to the 1st poll from the Host since it requires a wake up signal The wake up signal can either be a serial transmission Host poll or asserting the CTS signal on the J4 port if used Normally the Host would issue a wake up poll wait for a time out period and then retry issue a second poll to obtain the response Applies to all of the Ports J2 J3 and J4 LZ Pro allows for running off Instrument s battery low power consumption LZ Con requires two Modbus polls from Host system to obtain the response e J2 Port J2 port always active J3 J4 still require comm wake up e J3 Port J3 port always active J2 J4 still require comm wake up o J4 Port J4 port always active J2 J3 still require comm wake up These options allow the user to configure one port J2 J3 J4 to remain awake or active to respond to a Host system s poll on the 1st try Only one port can be designated for this option the others still require a wake up signal This option helps to eliminate wake up retry polls from the Host to improve communications throughput Pro responds to 1st poll from Host on the configured port LZ Con higher power consumption may need AC or Solar power source 21 3 2 3 Protocol Detect Timeout Options e 10 to 60 seconds Configurable time out in seconds to determine how long the PT Board will remain awake trying to detect the protocol on one the Host Interface
23. erence to Zero option if your Host system transmits the Start Register Address with the same value as the configured value sends 7000 when configured Start Address is set to 7000 33 3 6 PT Logging The PT Board supports the industry standard data collection process used to obtain Hourly and Daily Archive historical data required by EFM applications Two options are available with regard to archive record size which are Enron and Mercury variant Shown below is a screen shot of the PT Config software screen PT Logging with the Enron logging format enabled Enron format should be selected if the number of logged data points needs to be limited to 5 for both Hourly and Daily Archive records The capacity is 35 days for each Archive Note Both the Daily and Hourly Archive data points Items are configured via the Instrument s Audit Trail selectable Items using MasterLink software Protocol Translator Configuration 1 61 Build 14 File PT Setup Help aL EILC ER Modbus Protocol Modbus redene Number Host PT Interface PT Instrument Interface PT Logging PT Logging Configuration m Daily Archive Items Log Variant Enron ng IV Log Mode Enable Alarm Event Log Enable Archive Time Format kou v 34 www honeywell com Honeywell Shown below is a screen shot of the PT Config software screen PT Logging with the Mercury a k a extended logging format enabled Mercury format
24. essure Low Alarm P3 Pressure High Alarm P3 Pressure Low Alarm P3 Pressure High High Alarm P3 Pressure Low Low Alarm Main Battery Low Alarm Mem Batt Low Alarm Battery Wake Cycles Alarm Main Alarm Output P1 Pressure High High Alarm P1 Pressure Low Low Alarm P2 Pressure High High Alarm P2 Pressure Low Low Alarm Solenoid State Digital Input 1 Alarm Digital Input 42 Alarm Digital Input 43 Alarm RBX Alarm Event Station Assmy Batt Low Alarm Electronic Rundant Index Alarm Pulser A High Alarm Pulser B High Alarm Pulser C High Alarm Switch 1 Fault Alarm Switch 2 Fault Alarm Internal Misc Alarm Mercury Corrector Item n a 145 143 0 146 144 0 451 452 0 0 0 0 099 101 100 108 0 0 0 0 0 0 0 0 176 0 435 069 070 071 102 103 104 Mercury Recorder Item n a 559 560 0 563 564 0 561 562 451 ERX only 452 ERX only 809 ERX only 810 ERX only 565 567 566 568 815 ERX only 816 ERX only 819 ERX only 820 ERX only 761 766 767 768 777 796 ER only 0 0 0 0 0 0 0 43 Modbus Mercury Mercury Mercury Register Item Description Corrector Item Recorder Item 1035 Pressure Out of Range Alarm 105 0 1036 Temp Out of Range Alarm 106 0 1037 Tamper Detected Alarm 107 0 1038 Flow Rate High Alarm 163 0 1039 Daily CorVol High Alarm 222 0 1040 Reserved 0 0 1041 Scheduled Callin Active 338 0
25. f the PT Instrument LZ This error is usually a result of the Starting Address being off by 1 Try enabling the Reference To Zero option see Modbus Register Mapping to compensate Exception 03 Illegal Data Value Data value is invalid or out of range for the slave device PT board Instrument Value s received in query have invalid format for requested item of Mercury Instrument e Exception 04 Slave Device Error Query cannot be processed PT unable to get a valid reply from Mercury Instrument Check cabling between PT and Instrument as well as configuration items involving PT to Instrument Interfacing e Exception 06 Slave Device Busy Query cannot be processed PT unable to establish a link with the Mercury Instrument Check cabling between PT and Instrument as well as configuration items involving PT to Instrument Interfacing 41 4 3 Modbus Register Types Listed below are the Modbus register types supported by the PT Board 4 3 1 Boolean Registers Alarms Data Description Instrument s Alarm Status Register Range 1001 1999 Mappable Registers NO Fixed Assignments Modbus Function Codes 01 02 05 and 15 See Section Boolean Item Cross Reference Table for the listing of Mercury Alarms 4 3 2 Floating Point Registers Real Numbers Data Description Instrument s Measurement Data Register Range 7000 7999 Mappable Registers YES Configurable Assignments Modbus Function Codes 03 04
26. mm port to 9600 same as PT Config Test serial connection to Instrument by using Display Items by Function from MasterLink s menu PT Board LEDs should both turn On solid during serial link After a connection is confirmed disconnect Link from MasterLink PT Board LEDs should both turn off 7 2 2 Setup Modbus Protocol 1 Reconnect to PT Board using PT Config software using the J3 connector 2 Select Modbus Protocol parameters see Section 3 4 Note normally test using Device Address 1 Configure Modbus type Register size etc 3 Setup Modbus Register Mapping see Section 3 5 4 Disconnect Link from PT Config PT Board LEDs should both turn off Test the host Modbus system PT Board Host LED should turn On as serial activity starts while the MI LED should then turn On with an acceptable Modbus query If the MI LED does not turn ON the PT Board Modbus settings do not match the Host See section 6 2 for details 53 8 Problem Checks 8 1 Instrument Interface The following points should be checked if communications problems occur when using the PT Board Consult Mercury Instrument for any additional assistance 7 Confirm the PT Instrument Access Code matches that of the corresponding Instrument typically 33333 See Section 3 3 3 The PT Board Instrument s Access Code is displayed as The PT Board does not require a matching Access Code to connect using Mercury Protocol only required
27. of the configured Items per the Daily Archive list 10 Items These Items are read just after Start Time Item 205 for Correctors The Daily Archive list needs to be configured with Previous Day type Items to create a daily archive record useful for measurement billing purposes Using the Mercury log variant the Daily Archive data cannot be restored if the PT Board looses power This is due to the fact that the Daily Archive records are obtained by directly reading Instrument Items once a day at Start Time 3 6 3 Alarm Event Log Enable Options indicates disabled indicates enabled Select if Alarm and or Event data is required from the PT Board Modbus format Log Mode Enable must be selected to obtain Alarm Event data KI Alarm Event data conforms to Enron s specifications use Modbus ASCII protocol 37 3 6 4 Archive Time Format Options o HH MM traditional Enron e HH MM SS include seconds in timestamp Select if the additional SS seconds information is required for the Archive timestamp ea HH indicates hours MM indicates minutes SS indicates seconds 38 www honeywell com Honeywell Section C Modbus Protocol Details and Archive Data Support 40 4 Modbus Protocol Details 4 1 Modbus Function Codes Listed below are the Modbus Functions Codes supported by the PT Board e Function 01 Read Output Status Alarms e Function 02 Read Input Status Alarms Reads data from Mercu
28. ommended to use the Register Mapping feature of the PT Board The Register sequence order differs slightly between 32 bit Register and 16 bit register data formats Shown below is a screen shot of the PT Config software screen Modbus Register to Item Number Mapping Shown is just one example of Register mapping using 32 bit registers Protocol Translator Configuration 1 60 Build 3 Die PT Setup Help Tal EE EUdasAms p Host PT Interface PT Instrument Interface PT Logging Modbus Register to Item Number Modbus Protocol Has 7020 204 7030 mm MV Enable Mapping Item Register Offset mam Ea mal 702 Clear 7023 7033 ites 7034 If Enabled user supplied instrument item code numbers are 3 5 converted to Modbus registers beginning with the Item eer a DR Register Start value as defined by the table to the left 7026 7036 mz Maximum 40 items asf zoaz 702 7038 7023 7035 31 3 5 1 Enable Mapping Options indicates enabled L indicates disabled Enables mapping of Mercury Item Numbers to specific Modbus Registers as required by the Host SCADA system 3 5 2 Item Register Assignments Options e 000 to 999 Mercury Item Numbers Enter the desired Mercury Item numbers in the corresponding Register cells of the map Only one Item number per Register cell LZ Beier to the corresponding Mercury reference manual for the proper Instr
29. protocol Receipt of the 3Ah character qualifies for Modbus ASCII protocol Modbus RTU protocol requires a framed packet with a valid CRC 16 to qualify Communications Ended Host and MI LEDs D1 D2 turn Off when the protocol session is ended 6 2 2 PT board to instrument comm status Comm Errors Detected 4 MI LED D2 blinks rapidly 5 times due to serial comm problems with the Instrument Host LED D1 will already be On and remain so at this point If Log Mode is enabled LED 2 MI is On when the PT Board is linked to the Instrument to retrieve Achieve data on an hourly interval top of hour www honeywell com Honeywell 7 Setup Basics 7 1 Connections Checked the following before performing a configuration of the PT Board Power cable is connected to either J7 or J8 Supply 5 16 VDC PC serial cable is connected to J3 for configuration setup PT Board is connected to Instrument via J5 or J6 and JMP 2 is properly installed Nothing connected to J1 PRGM port 7 2 Initial Configurations 7 2 1 Setup for Mercury Link to Instrument 1 Connect to PT Board using PT Config software using the J3 connector The J3 default baud is 9600 ensure PT Config set to 9600 2 Select baud rate for main Host system connection see Section 3 2 1 3 Select Instrument type see Section 3 3 2 4 Disconnect Link from PT Config PT Board LEDs should both turn off 5 Open MasterLink software and setup co
30. r 32 bit data for Analog float data 3 4 2 Device Address Options 1 to 247 Select a unigue Slave Device address for each PT Board within the range of 1 to 247 Note 0 is used for broadcast 3 4 3 Register Data Format Options e 32 bits MSB Single Register used to for the 32 bit data 16 bits MSB Two Registers used for the 32 bit data 1st Register contains upper 16 bits MSB 1st 2nd Register contains lower 16 bits o 16 bits LSB Two Registers used for the 32 bit data 1st Register contains lower 16 bits LSB 1st 2nd Register contains upper 16 bits Select the Register size used by the Host system for storing floating point data See Section 4 3 3 www honeywell com Honeywell 3 4 4 Inactivity Timeout Options 1 to 255 seconds This option selects the length of time the PT Board will remain awake locked in to Modbus protocol mode waiting to receive another valid Modbus query from the Host The Inactivity time out period starts after the PT Board responds to a valid Modbus query This timer resets when a valid Modbus query is received during the time out period If no Modbus queries are received within the inactivity time out period the PT terminates that particular protocol session and is free to then begin a protocol session Mercury or Modbus on any available port Select a low value 1 3 secs if you plan to issue only one Modbus query poll in a session or if there are no long delays between mul
31. ry Instrument Boolean type Items Alarm status Items Boolean values 0 1 packed as 8 bits per byte standard Modicon format e Function 03 Read Output Registers Analog Floats o Function 04 Read Input Registers Analog Floats Returns data floating point from Instrument Also used to read Archive Historical data e Function 05 Write Single Output Alarm Writes data to a Mercury Instrument Boolean Item normally to clear a single active Alarm Writes single Boolean value 0 1 to Instrument s Alarm Item e Function 06 Write Single Register Analog Float Writes a single value floating point to Instrument s Item LZ This Function codes requires the 32 bit Register Data format e Function 15 OFh Write Multiple Outputs Alarms Writes data to Mercury Instrument Boolean Items normally to clear active Alarms Writes Boolean values 0 1 packed as 8 bits per byte o Function 16 10h Write Multiple Registers Analog Floats Writes multiple values floating point to Instrument s Items www honeywell com Honeywell 4 2 Modbus Exception Codes Listed below are the Modbus Exception Codes supported by the PT Board e Exception 01 Illegal Function Function code is not an allowable action by slave device PT board Instrument e Exception 02 Illegal Data Address Register address is out of range for the slave device PT board Instrument Attempting to access an register that is beyond the legal limit o
32. s a screen shot of the PT Config software screen Modbus Protocol Example configuration for MODBUS ASCII 32 bit Register format Protocol Translator Configuration 1 61 Build 14 File PT Setup Help EUdaslams p Host PT Interface PT Instrument Interface PT Logging Modbus Register to Item Number Mapping Modbus Protocol Type ascii DI Device Address 1 Register Data Format 32 bits MSB DI Time Date Format Floating Point v Inactivity Time out 5 ad Sec Access Level Read write Communications Format 7 Even DI 26 www honeywell com Honeywell Shown below is a screen shot of the PT Config software screen Modbus Protocol Example configuration for MODBUS RTU using 16 bit MSB Register format Protocol Translator Configuration 1 61 Build 14 File PT Setup Help cshaSQauns I Host PT Interface PT Instrument Interface PT Logging Modbus Protocol Modbus Genre SE Number Modbus Protocol Type RTU DI Device Address 1 Register Data Format 15 bits MSB DI Time Date Format Floating Point DI Inactivity Time out 5 See Access Level Read Write DI Communications Format fE Nore DI 27 28 3 4 1 Modbus Protocol Type Options e ASCII e RTU Select the proper MODBUS Protocol format required for interfacing with the Host system LZ Modbus ASCII uses a register size of 32 bit data for Analog float data LZ Modbus RTU uses a register size of either 16 o
33. ssies Ese er ees Ken See ei Ge Ee ER EE EER 31 3 5 1 Enable MA UNG RR 32 3 5 2 Item Register Aesignments 32 3 5 3 Item Register Ofteet ee 33 3 5 4 Reference TO 20 EEN EA eee 33 3 6 PT Ge 34 3 6 1 Log Mode Enable usuetvsmsuusieunevnen vinnes 36 3 6 2 L g Varai EE Ee ii 36 3 6 3 Alarm Event Log Enable sis ER See we ee es We EE EE ERGER 37 3 6 4 Archive Time Formal sesse kiss ss As ae ae ke ER ee ee ee ee 38 Section C Modbus Protocol Details 4 Modbus Protocol Details sae RE ERG EER KA NE N Ad ek RE Sa rd ek dd 40 4 1 Modbus le enee EE A0 4 2 Modbus Exception Codes Ae 41 4 3 Modbus Register Tvpes ees esse ee ee ee AA AA ee 42 4 3 1 Boolean Registers I lammsl ee RR ee ee ee ee ee ee 42 4 3 2 Floating Point Registers Real Numbers sesse sesse ee ee ee 42 4 3 3 Register LES e ee EG DA BE EE AE EE gee EE GE OE nnne 42 4 4 Register Cross Reference for Boolean Items sees ee 43 5 Archive Data Desriphon unuuunmnmumnnuumj i AN AR GN REK KAN NG Ne ANS ed 45 5 1 Modbus Archive Reoisters sv SEER ER EENS Bee N ee OG EE SE DEERE SE DEd 45 Ee Re ln e BE 45 5 2 1 Enron Log Variant 5 item records sesse ese ees ee ee ee ee ee ee ee ee ee ee ee ee 45 5 2 2 Mercury Log Variant 10 item records sees ee ee ee ee ee ee ee 45 5 3 Daily and Hourly Archive Golleetion isi es NEKKE Ee AK EN Ee EE KEES 46 5 4 Alarm Event Collection sesse ee ee AG AA ee ee ee ee 46 5 5 Enron Archive lefS ies NE Ee EE Ee ie GE Eg Ee Ge ee 47 5 5 1 Hourly
34. strument s Audit Trail memory t Hourly and Daily Archive records each contain a Time and Date stamp plus 5 Audit Trail Items The Hourly Archive record contains the 1st 5 Items in the Audit Trail while the Daily Archive record contains the last 5 Audit Trail Items gt Example Hourly Archive record Date Time AT Item 1 AT ltem 2 AT Item 3 AT ltem 4 AT Item 5 gt Example Daily Archive record Date Time AT Item 6 AT ltem 7 AT Item 8 AT ltem 9 AT Item 10 www honeywell com Honeywell Mercury variant Archive data is obtained from both the Instrument s Audit Trail memory and by direct read ing of configured Instrument Items when the Instrument s time matches the configured Start of Gas Day time The main benifit of the Mercury log option is the increased record size from 5 to 10 data points for both Daily and Hourly archives The Hourly Archive record contains all 10 Items read from the Audit Trail memory records The Daily Archive record contains the 10 Item values read from the configured Daily Archive Items list gt Example Hourly Archive record Date Time AT Item 1 AT Item 2 AT Item 3 AT Item 4 AT Item 5 AT Item 6 AT Item 7 AT Item 8 AT Item 9 AT Item 10 gt Example Daily Archive record Date Time Daily Item 1 Daily Item 2 Daily Item 3 Daily ltem 4 Daily ltem 5 Daily Item 6 Daily Item 7 Daily Item 8 Daily Item 9 Daily Item 10 The Daily Archive data is obtained by direct reading
35. ti poll queries LZ Recommended setting for most applications is 2 5 seconds 3 4 5 Access Level Options e Read Write default setting e Read Only No Modbus writes This option selects the access level of the Instrument s Item for Modbus protocol Read Write allows the Host to use Modbus protocol to update Instrument Item values by using Function codes 05 06 15 and 16 Read Only rejects Function codes 05 06 15 16 preventing a Modbus system from tam pering with Instrument Item values 3 4 6 Time Date Format Options for writing changing Time amp Date e Floating Point default setting e BCD certain VECTOR SCADA systems 77 Reading output of Time amp Date is always Floating Point format 29 3 4 7 Communications Format Options e 8 None 8 data No parity e 7 Even 7 data parity e 7 Odd 7 data parity e 8 Even 8 data parity e 8 Odd 8 data parity This option selects parity format of the Modbus protocol Configuration does not apply to Mercury protocol which is always 8 None lt Modbus RTU protocol must use one of the 8 data bit options 30 www honeywell com Honeywell 3 5 Modbus Register Mapping The PT Board has several additional configuration options for interfacing to MODBUS protocol systems Register mapping allows the user to obtain Instrument data points and store these values in Modbus registers per their application Itis highly rec
36. tor on the PT board Connect the Serial Cable 40 1629 from the MPA to the computer Comm port Start Firmware Upgrade Manager program on your computer install if required RW N Choose PT icon from top of menu 15 x Not Connected to MPA or Instrument 57 5 Browse to the desired PT Firmware file ptf then press OK to send 6 Firmware will then be programmed in to Flash memory and verified 7 After successful programming press OK to exit Disconnect the MPA from the PT Board J1 conn after completing the Firmware up grade process Open 2 x File name Folders pt_22004_ptx c mercury fwum Jer J mercury E fwum Cancel di Network C items List files of type Drives PT Firmware v amp c v 58 www honeywell com Honeywell Find Out More To learn more about Mercury Instruments products contact your Honeywell Process Solutions representative visit www mercuryinstruments com or call 513 272 1111 Automation and Control Solutions Honeywell Process Solutions 3940 Virginia Ave Cincinnati OH 45227 STE 513 272 1111 October 2010 www honeywell com 2010 Honeywell Honeywell
37. ument Item numbers Correctors and Recorders have very different Item numbering LZ When using 16 bit Register Formats MSB amp LSB enter Item numbers in every other cell skipping one cell between each Item Example Mapping Corrector using 32 bit Register format Register Item Description 7000 002 Meter Volume 7001 000 Corrected Volume 7002 008 Pcor Pressure 7003 026 Tcor Temperature 32 www honeywell com Honeywell Example Mapping Corrector using 16 bit Register format Register Item Description 7000 002 Meter Volume 7001 7002 000 Corrected Volume 7003 7004 008 Pcor Pressure 7005 7006 026 Tcor Temperature 7007 7 Refer to heading 4 4 3 regarding 16 bit and 32 bit Register sizes 3 5 3 Item Register Offset Options e 0000 to 9000 7000 default floats Allows changing the base address of Modbus Registers from 7000 to another value Normally this is not required and should would not be changed from since most SCADA systems use 7000 range for floating point data 3 5 4 Reference to Zero Options O indicates disabled Enron J Bus format indicates enabled Modicon format Reference to Zero Modicon Modbus Enable the Reference to Zero option if your Host system transmits the Start Register Ad dress with a value of 1 less than the configured value sends 6999 when configured Start Address is set to 7000 Reference to One Enron J Bus Modbus Disable the Ref
38. ype to match the Instrument connecting with the PT Board 24 www honeywell com Honeywell 3 3 3 Instrument Access Code Enter the five digit security access code that is used by the Instrument The PT Config software screen always displays the Access Code as The default access code is 333393 LZ If the Instrument s Access code has been changed from the default code you will need to configure the PT Board with this same code Failure to enter the proper access code will prevent the PT Board from connecting to the Instrument by means of MODBUS protocol 3 3 4 AT Modem Hangup Enable J4 Port Options indicates enabled L indicates disabled Selecting this option causes the PT Board to issue an ATHO hang up command after the serial communications session is terminated This ensures the Slave modem if installed is back On Hook again after completing a call This options is normally not required 3 3 5 Instrument Call in Enable J4 Port Options indicates enabled O indicates disabled Enables the PT Board to allow an Instrument configured for AT style Call in to pass on through to the Modem connected on the J4 port This options is normally not used F Call in to a MODUS host system is NOT supported Call in to Mercury Protocol compliant systems only 25 3 4 Modbus Protocol The PT Board has several configuration options for interfacing to MODBUS protocol sys tems Shown below i

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