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<6. TROUBLE SHOOTING>

6-1

IM 11G02Q02-01EN 2nd Edition : Sep. 04, 2020-00

6. TROUBLE SHOOTING

If the communication is unavailable, check the following items.

• Whether all devices related to communication are turned on.
• Whether connections are correct.

• Whether the number of connected instruments and connection distance are as specified

• Whether communication conditions coincide between the master station (host computer)

and slave stations (instrument)

Transmission speed : 38400bps
Data length : 8 bits
Stop bit : 1 bit
Parity : None
Whether send/receive signal timing conforms to Section 5.6 in this manual.

• Whether the station No. designated as send destination by the master station coincides with

the station No. of the connected instrument.

• Whether more than one instrument connected on the same transmission line shares the

same station No.

• Whether the station No. of instruments is set at other than 0.
If it’s 0, the communication function does not work.

Summary of Contents for IR202

Page 1: ...User s Manual Model IR202 Infrared Gas Analyzer Communication Functions MODBUS IM 11G02Q02 51EN IM 11G02Q02 51EN 2nd Edition ...

Page 2: ...mbers of related documents are as follows The EN in the document number is the language code meaning English General Specifications GS 11G02Q02 01EN User s Manual IM 11G02Q02 01EN IM 11G02Q02 51EN Communication Functions MODBUS This manual IM 11G00E01 01EN ZX8D Zirconia Oxygen Analyzer Media No IM 11G02Q02 51EN 2nd Edition Sep 2020 YK All Rights Reserved Copyright 2017 Yokogawa Electric Corporatio...

Page 3: ...or fatalities or the damages to products The manual describes what special care the operator must take to avoid such risks CAUTION This symbol indicates that the operator must refer to the instructions in this manual in order to prevent the product hardware or software from being damaged or a system failure from occurring The following are signal words to be found only in our instruction manuals C...

Page 4: ...ions or character types e g the upper lower case Also note that some of the images contained in this user s manual are display examples n Authorized Representative in EEA The Authorized Representative for this product in EEA is Yokogawa Europe B V Euroweg 2 3825 HD Amersfoort The Netherlands n Trademark policy All names of company brand of product used in this manual are registered trademarks TM o...

Page 5: ...ged repair fee regardless of warranty period Failure of components which are out of scope of warranty stated in instruction manual Failure caused by usage of software hardware or auxiliary equipment which Yokogawa did not supply Failure due to improper or insufficient maintenance by user Failure due to misoperation misuse or modification which Yokogawa does not authorize Failure due to power suppl...

Page 6: ...f error check code CRC 16 3 4 3 5 Transmission control procedure 3 6 4 DETAILS OF MESSAGE 4 1 4 1 Read out word data Function code 03H 4 1 4 2 Read out word data Read out only Function code 04H 4 2 4 3 Write in word data 1 word Function code 06H 4 4 4 4 Write in continuous word data Function code 10H 4 5 5 ADDRESS MAP AND DATA FORMAT 5 1 5 1 Data format 5 1 5 1 1 Handling of decimal point position...

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Page 8: ...an communicate with only one slave station at a time the destination can be identified by the Station No set for each slave station In order that the master station and the slave station can communicate the format of the transmit receive data must coincide The format of the communication data is determined by the MODBUS protocol RS 232 RS 485 converter recommended Type KS 485 non isolated type SYS...

Page 9: ...ynchronous system Connection format 1 N Maximum connectable units 31 units Transmission distance 500 m max total extension distance Transmission speed 38400 bps Data format Data length 8 bits Stop bit 1 bit Parity None X flow control None Transmission code HEX value MODBUS RTU mode Error detection CRC 16 Isolation Isolation from internal circuit Functional isolation between signal line and ground ...

Page 10: ...panel 5 4 3 2 9 8 7 6 1 1 Signal ground 2 RTxD 3 RTxD 4 to 9 NC 9 pin D Sub female RS 485 interface requires Use a shielded twist pair cable Recommended cable KPEV SB made by The Furukawa Electric Co Ltd The maximum cable length should be 500m One master and up to thirty one micro controllers slaves can be connected per circuit Terminate both ends of the circuit with a terminating resistance of 10...

Page 11: ...e When using the micro controller in an area where the imposed noise level is expected to exceed 500V we recommend using a noise filter on the master side as seen in the figure below We recommend RSHN 2003 made by TDK Corporation as a noise filter RS 485 IR202 Noise filter Programmable controller or Personal computer RS 232C to RS 485 converter If there are problems with EMC during communication t...

Page 12: ...shows the items to setup Set them by operating the front panel keys Item Value at delivery Setting range Remarks Transmission speed 38400bps Fixed can not be changed Set up correctly so that the communication conditions of all IR202s must be same as master s Data length 8 bits Fixed can not be changed Stop bit 1 bit Fixed can not be changed Parity setting None Fixed can not be changed Station No 1...

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Page 14: ...ge Response message Slave to master Master to slave Data on the line When the station No in the received command message mismatches with the own slave station No Command message Not respond Slave to master Master to slave Data on the line The master station can individually communicate with any one of slave stations connected on the same line upon setting the station No in the command message 3 1 ...

Page 15: ...sends back a response message which corresponds to the command message The composition of message in this case is the same as in section 3 2 Contents of the data field depend on the function code For details refer to 4 DETAILS OF MESSAGE 2 Response to abnormal command If a command message contains an abnormality for example non actual function code is designated other than transmission error the s...

Page 16: ...ber This correspondence is shown in Table 3 2 and the message length by function is shown in Table 3 3 Table 3 2 Correspondence between function codes and objective address Function code Register No No Function Object No Description 03H Read out continuously Holding register 4xxxx Read out write in word data 04H Read out continuously Input register 3xxxx Read out word data 06H Write in Holding reg...

Page 17: ...ents 1 bit to the right Store 0 at MSB 4 If LSB before shifting is 0 do nothing If LSB before shifting is 1 subject it and A001H to XOR and store the result into the CRC register 5 Repeat the steps c and d 8 times shift by 8 bits 6 Execute steps b to e for the next byte of the transmit message Likewise successively repeat the steps to each byte of the transmit message 7 The CRC code that is retain...

Page 18: ...its results is set in CR Set 1 in J Bit at right end of CR is 1 Shift CR to right by 1 bit and A001H and exclusive logical sum XOR are executed and its result is set in CR Shift CR to right by 1 bit Add 1 to J Calculation 8 times is finished J 8 Add 1 to I Calculation of all characters is completed I All characters End Calculation is executed in the order of command message station No function cod...

Page 19: ...us on the line of the communication system is one of the 2 below a Vacant status no data on line b Communication status data is existing Instruments connected on the line are initially at a receiving status and monitoring the line When 24 bits time or more vacant status has appeared on the line the end of preceding frame is assumed and within following 24 bits time a receiving status is posted Whe...

Page 20: ...Lower byte of contents of the first word data Upper byte of contents of the next word data Lower byte of contents of the next word data Upper byte of contents of the last word data Lower byte of contents of the last word data Arrangement of read out word data MSB LSB CRC data CRC data Read out word number Contents of the last word data Contents of the next word data Contents of the first word data...

Page 21: ...03H CRC data Lower 85H Lower E8H Upper CAH CRC data Lower FAH Upper 8DH The following describes how read out data is compiled Ch2 range 1 zero calibration concentration setting 00 00H 0 contents of first word data Ch2 range 1 span calibration concentration setting 03 E8H 1000 contents of next word data Provided decimal point position 1 measurement unit 1 Ch2 range 1 zero calibration concentration ...

Page 22: ...ta of continuous word numbers from the read out start No can be read Read out word data are transmitted from the slave station in the order of upper and lower bytes 3 Message transmission example The following shows an example of reading out from No 1 station the Ch5 measurement concentration decimal point position and measurement unit Relative address of Ch5 measurement concentration 000CH Data n...

Page 23: ... Lower CRC data Lower CRC data Lower Upper Upper 2 Function Designated word data is written in write in designate No Write in data are transmitted from master station in the order of upper and lower bytes 3 Message transmission example The following shows an example of transmitting the ZERO key command to No 1 station Key operation command Relative address 07D0H Command message composition byte St...

Page 24: ...Upper byte of contents of the last word data Lower byte of contents of the last word data Arrangement of read out word data MSB LSB CRC data Last write in word data Write in word number Upper Lower Upper Lower Upper Lower Upper Lower Lower Upper Next write in word data First write in word data Write in byte number Upper Lower Response message composition byte Station No Function code CRC data Writ...

Page 25: ...ssage Station No 01H Station No 01H Function code 10H Function code 10H Write in start No Upper 00H Write in start No Upper 00H Lower 23H Lower 23H Write in word number Upper 00H Write in word number Upper 00H Lower 04H Lower 04H Write in byte number 08H CRC data Lower 30H First write in word data Upper 13H Upper 00H Lower 88H Next write in word data Upper 00H Lower 0AH Next write in word data Upp...

Page 26: ...s a value of 0 1 2 or 3 You can obtain an exact value by the following calculation Case 0 Calibration concentration setting data 1 Case 1 Calibration concentration setting data 10 Case 2 Calibration concentration setting data 100 Case 3 Calibration concentration setting data 1000 The unit data has a value of 0 1 2 or 3 that corresponds as follows Case 0 vol Case 1 ppm Case 2 mg m3 Case 3 g m3 For ...

Page 27: ...ster No 30007 1270 Ch3 decimal point position register No 30008 2 Ch3 measurement unit register No 30009 0 the value is 12 70 vol 5 1 2 Handling at measurement data over range Even if the measurement data is at over range with displayed on the screen the data that stands then is transmitted as read out measurement concentration ...

Page 28: ...d Ch2 range 2 span calibration concentration 0008H 40009 Word Ch3 range 1 zero calibration concentration 0009H 40010 Word Ch3 range 1 span calibration concentration 000AH 40011 Word Ch3 range 2 zero calibration concentration 000BH 40012 Word Ch3 range 2 span calibration concentration 000CH 40013 Word Ch4 range 1 zero calibration concentration 000DH 40014 Word Ch4 range 1 span calibration concentra...

Page 29: ...itch 0023H 40036 Word Ch1 range 1 high alarm setting 0 to 9999 Decimal point position depends on range Alarm setting option 0024H 40037 Word Ch1 range 1 low alarm setting 0025H 40038 Word Ch1 range 2 high alarm setting 0026H 40039 Word Ch1 range 2 low alarm setting 0027H 40040 Word Ch2 range 1 high alarm setting 0028H 40041 Word Ch2 range 1 low alarm setting 0029H 40042 Word Ch2 range 2 high alarm...

Page 30: ...0 to 20 FS 0042H 40067 Word Auto calibration start time day 00H to 06H Sun to Sat Setting of auto calibration option 0043H 40068 Word Auto calibration start time hour 00H to 23H BCD code 0044H 40069 Word Auto calibration start time min 00H to 59H BCD code 0045H 40070 Word Auto calibration cycle 0046H 40071 Word Auto calibration cycle unit 0 1 0 h 1 days 0047H 40072 Word Auto calibration switch 0 1...

Page 31: ...05EH 40095 Word Peak alarm switch 0 1 0 OFF 1 ON Setting of peak alarm 005FH 40096 Peak alarm concentration 0064H to 03e8H 100 to 1000ppm 0060H 40097 Peak alarm count 0001H to 0063H 1 to 99 times 0061H 40098 Word Peak alarm hysteresis 0000H to 0014H 0 to 20 FS 0062H 40099 Word Auto zero calibration start day 00H to 06H Sun to Sat Setting of auto zero calibration option 0063H 40100 Word Auto zero c...

Page 32: ...rget channel 007DH 40126 Word Alarm 6 target channel 007EH 40127 Word alarm 6 range 1 high alarm setting 0 to 9999 Decimal point position depends on range Alarm 6 setting option 007FH 40128 Word alarm 6 range 1 low alarm setting 0080H 40129 Word alarm 6 range 2 high alarm setting 0081H 40130 Word alarm 6 range 2 low alarm setting 0082H 40131 Word alarm 6 alarm mode same as alarm Ch1 to 5 0083H 401...

Page 33: ...t 0 1 0 h 1 min 009BH 40156 Word Measurement point change displacement time 003Ch to 0384H 60 to 900 sec 009CH 40157 Word Measurement point change setting 0 1 2 0 Line 1 Line 2 2 Change 009DH 40158 Word O2 concentration limit at the time of oxygen correction 01H to 14H 1 to 20 009EH 40159 Word Reference Gas Switching Time 1 to 1Eh 1 to 30 sec for IR202 C 009FH 40160 Word Reference Gas Measuring Ti...

Page 34: ...No Data type Memory contents Read out write in data Remarks or corresponding parameter 07D0H 42001 Word Keying command 01H MODE 02H Side 04H Up 08H Down 10H ESC 20H ENT 40H ZERO 80H SPAN Sending a value simulates 07D1H 42002 Word Display change 1 Return to measurement mode display Force to return to measurement mode 07D2H 42003 Word Auto calibration 1 Execute auto calibration Auto calibration is e...

Page 35: ...Word Ch4 measurement unit 000CH 30013 Word Ch5 concentration 000DH 30014 Word Ch5 decimal point position 000EH 30015 Word Ch5 measurement unit 000FH 30016 Word Ch6 concentration 0010H 30017 Word Ch6 decimal point position 0011H 30018 Word Ch6 measurement unit 0012H 30019 Word Ch7 concentration 0013H 30020 Word Ch7 decimal point position 0014H 30021 Word Ch7 measurement unit 0015H 30022 Word Ch8 co...

Page 36: ...ess 0036H 30055 Word Ch1 span calibration in progress 0037H 30056 Word Ch2 span calibration in progress 0038H 30057 Word Ch3 span calibration in progress 0039H 30058 Word Ch4 span calibration in progress 003AH 30059 Word Ch5 span calibration in progress 003BH 30060 Word Instrument error 0 1 0 No 1 Yes Whether error is produced 003CH 30061 Word Calibration error 0 1 0 No 1 Yes Whether error is prod...

Page 37: ...Yes 00A0H 30161 Word Ch5 Error 5 00A1H 30162 Word Ch5 Error 6 00A2H 30163 Word Ch5 Error 7 00A3H 30164 Word Ch5 Error 8 00A4H 30165 Word Ch5 Error 9 00A5H 30166 Word Ch1 auto zero calibration in progress 0 1 0 No 1 Yes 00A6H 30167 Word Ch1 auto span calibration in progress 00A7H 30168 Word Ch1 hold in progress 0 1 0 No 1 Yes 00AEH 30175 Word Ch4 auto zero calibration in progress 0 1 0 No 1 Yes 00A...

Page 38: ...ing parameter 00BAH 30187 Do not use 00BBH 30188 Do not use 00BCH 30189 Word Manual calibration channel Cursor Ch 1 c 00BDH 30190 Do not use 00BEH 30191 Word High Low limit alarm 6 00BFH 30192 Do not use 00C0H 30193 Do not use 00C1H 30194 Do not use NOTE 1 Set 0 for accessing to the area not used within address map 2 For contents of a to c refer to 5 3 Supplement to address map ...

Page 39: ...cimal point position taken into consideration Actual range value Read range value X X is 1 when 0 is selected 10 when 1 is selected and 100 when 2 is selected and 1000 when 3 is selected for decimal point position 0435H 31078 Word Ch1 range 2 value 0436H 31079 Word Ch2 range 1 value 0437H 31080 Word Ch2 range 2 value 0438H 31081 Word Ch3 range 1 value 0439H 31082 Word Ch3 range 2 value 043AH 31083...

Page 40: ...Type 14th digit 0 to 9 A to Z 0456H 31111 Word Type 15th digit 0 to 9 A to Z 0457H 31112 Word Type 16th digit 0 to 9 A to Z 0458H 31113 Word Type 17th digit 0 to 9 A to Z 0459H 31114 Word Type 18th digit 0 to 9 A to Z 045AH 31115 Word Type 19th digit 0 to 9 A to Z 045BH 31116 Word Type 20th digit 0 to 9 A to Z 045CH 31117 Word Type 21st digit 0 to 9 A to Z 045DH 31118 Word Type 22nd digit 0 to 9 A...

Page 41: ...tion setting 4 Alarm setting 5 Automatic calibration setting 6 Peak alarm setting 7 Parameter setting 8 Maintenance mode 9 Factory mode 10 Auto zero calibration setting The next values on display information 2 represent the following status at manual calibration 0 Measurement mode 4 Channel selection at manual zero calibration 5 Zero calibration wait at manual zero calibration 6 Zero calibration i...

Page 42: ...e between the master station host computer and slave stations instrument Transmission speed 38400bps Data length 8 bits Stop bit 1 bit Parity None Whether send receive signal timing conforms to Section 5 6 in this manual Whether the station No designated as send destination by the master station coincides with the station No of the connected instrument Whether more than one instrument connected on...

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Page 44: ...del IR202 Infrared Gas Analyzer Communication Functions MODBUS Manual No IM 11G02Q02 51EN Sep 2020 2nd Edition Corrections and reviews pages 3 1 3 2 3 3 3 6 4 2 4 6 5 13 June 2017 1st Edition Newly published n Published by Yokogawa Electric Corporation http www yokogawa com an ...

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