MODBUS Protocol
Function Codes
Thermo Electron Corporation
48
i
Instruction Manual
C-7
(0x05) Force (Write) Single Coil
The force (write) single coil function simulates the activation of the digital
inputs in the instrument, which triggers the respective action.
This function code is used to set a single action to either ON or OFF. The
request specifies the address of the action to be forced. Actions are addressed
starting at zero. Therefore, action number 1 is addressed as 0. The requested
ON/OFF state is specified by a constant in the request data field. A value of
0xFF00 requests the action to be ON. A value of 0x0000 requests it to be
OFF. All other values are illegal and will not affect the output. The normal
response is an echo of the request, returned after the state has been written.
Here is an example of a request to write Coil 5 ON:
Request
Function code
1 Byte
0x05
Output Address
2 Bytes
0x0000 to maximum allowed by instrument
Output Value
2 Bytes
0x0000 or 0xFF00
Response
Function code
1 Byte
0x05
Output Address
2 Bytes
0x0000 to maximum allowed by instrument
Output Value
2 Bytes
0x0000 or 0xFF00
Error Response
Function code
1 Byte
Function code + 0x80
Exception code
1 Byte
01=Illegal Function, 02=Illegal Address,
03=Illegal Data, 04=Slave Device Failure
Request
Field Name
(Hex)
Function
05
Output Address Hi
00
Output Address Lo
05
Output Value Hi
FF
Output Value Lo
00
Содержание 48i
Страница 1: ...Model 48i Instruction Manual Gas Filter Correlation CO Analyzer Part number 101891 00 8Apr2005 ...
Страница 12: ...Preface Thermo Electron Corporation Model 48i Instruction Manual xii ...
Страница 22: ...Installation Startup 2 6 Model 48i Instruction Manual Thermo Electron Corporation ...
Страница 222: ...Servicing Service Locations 7 40 Model 48i Instruction Manual Thermo Electron Corporation ...
Страница 236: ...System Description I O Components 8 14 Model 48i Instruction Manual Thermo Electron Corporation ...
Страница 241: ...Thermo Electron Corporation Model 48i Instruction Manual 9 5 Figure 9 3 Bench Mounting ...
Страница 242: ...9 6 Model 48i Instruction Manual Thermo Electron Corporation Figure 9 4 EIA Rack Mounting ...
Страница 243: ...Thermo Electron Corporation Model 48i Instruction Manual 9 7 Figure 9 5 Retrofit Rack Mounting ...
Страница 244: ...Optional Equipment Mounting Options 9 8 Model 48i Instruction Manual Thermo Electron Corporation ...
Страница 292: ...C Link Protocol Commands Record Layout Definition B 46 Model 48i Instruction Manual Thermo Electron Corporation ...