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6 F 2 T 0 1 7 2
Modbus: Interoperability
1. Physical and Data Link Layer
- RS485(EIA/TIA-485) 2-wire interface
- RTU mode only
- Coding System:
8–bit binary (1 start bit, 8 data bits, 1 parity bit, 1 stop bit)
Even parity
- Address setting range: 1-247
- Baud rate setting range: 9600 or 19200
2. Application Layer
(1) Modbus response format
FC Description
Supplementary explanation
01 Read Coils
Returns remote control enable flag
02 Read Discrete Inputs
Returns BIs or LED lamp status, etc.
03 Read Holding Registers
-
04 Read Input Register
Returns value of analog inputs
05 Write Single Coil
Remote command and Time synchronization
06 Write Single Register
Need to specify record number
07 Read Exception status
Returns relay and CB status
08 Diagnostic
-
16 Write Multiple Registers
Current time setting, etc.
17 Report Slave ID
Returns device ID
43 Read device Identification (SC:14)
Returns device information
For FC (Function Code) = 01, 02, 03, 04, 05, 06 and 16, the response format is the same as described
in "Modbus Application Protocol Specification V1.1b".
For other FCs, the response format is as following:
07 Read Exception status
Response Data
Output Data (1byte)
bit Description
0 IN SERVICE (LED)
1 TRIP (LED)
2 ALARM (LED)
3 RELAY FAIL (LED)
4 CB CLOSED (LED)
5 CB OPEN (LED)
6 Relay fail output (BO)
7 <Reserved>
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Summary of Contents for GRE110
Page 183: ...6 F 2 T 0 1 7 2 Appendix B Signal List 184 ...
Page 191: ...6 F 2 T 0 1 7 2 Appendix C Event Record Items 192 ...
Page 196: ...6 F 2 T 0 1 7 2 Appendix D Binary Output Default Setting List 197 ...
Page 199: ...6 F 2 T 0 1 7 2 Appendix E Relay Menu Tree 200 ...
Page 210: ...6 F 2 T 0 1 7 2 Appendix F Case Outline 211 ...
Page 211: ...6 F 2 T 0 1 7 2 Case Outline for model 400 401 420 421 820 and 821 212 ...
Page 212: ...6 F 2 T 0 1 7 2 Case Outline for model 402 and 422 213 ...
Page 213: ...6 F 2 T 0 1 7 2 Appendix G Typical External Connection 214 ...
Page 245: ...6 F 2 T 0 1 7 2 Appendix J Return Repair Form 246 ...
Page 249: ...6 F 2 T 0 1 7 2 Customer Name Company Name Address Telephone No Facsimile No Signature 250 ...
Page 250: ...6 F 2 T 0 1 7 2 Appendix K Technical Data 251 ...
Page 256: ...6 F 2 T 0 1 7 2 Appendix L Symbols Used in Scheme Logic 257 ...
Page 259: ...6 F 2 T 0 1 7 2 Appendix M Modbus Interoperability 260 ...
Page 289: ...6 F 2 T 0 1 7 2 Appendix N IEC60870 5 103 Interoperability 290 ...
Page 296: ...6 F 2 T 0 1 7 2 Appendix O PLC Default setting 297 ...
Page 298: ...6 F 2 T 0 1 7 2 Appendix P Inverse Time Characteristics 299 ...
Page 304: ...6 F 2 T 0 1 7 2 Appendix Q IEC61850 Interoperability 305 ...