GE Hydran 201i Instruction Manual page 249

Hydran* 201i Instruction Manual
J.3.1.2 Write (SET or FORCE) Single Coil (05h)
This function is used to set a binary value. Only one binary can be set at a time. The
address to set and the value must be specified. The value will be FF00h to set a binary,
and 0000h to clear it. The return will confirm the address and the value set. Table J - 8
below shows the format of the master and slave packets.
Note: This Section shows how to build and understand a 05h Modbus
request/response exchange. To read or write Hydran 201Ti digital data values, please
refer to the subsequent Sections.
Table J-9 below presents, as an example, the writing (SET) of coil 173 value to "ON".
Request
Response
Error
Function
Output Address Hi
Output Address Lo
Output Value Hi
Output Value Lo
MA-033 Rev. 14.0, 12-Nov-18
Function Code
Output Address
Output Value
Function Code
Output Address
Output Value
Error Code
Exception Code
Table J - 8: Format for Write (SET or FORCE) Single Coil (05h)
Request
Field Name (hex)
05
00
AC
FF
00
Table J - 9: Writing (SET) of Coil 173 Value to "ON"
1 byte 05h
2 bytes 0000h to FFFFh
2 bytes 0000h or FF00h
1 byte 05h
2 bytes 0000h to FFFFh
2 bytes 0000h or FF00h
1 byte 85h
1 byte 01 or 02 or 03 or 04 or 06
Response
Field Name
Function
Output Address Hi
Output Address Lo
Output Value Hi
Output Value Lo
(hex)
05
00
AC
FF
00
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