ProSoft Technology 5201-MNET-ASCII - Manual (Page 61)

MNET ♦ ProLinx Gateway Modbus Protocol Specification
Modbus TCP/IP Interface Module Driver Manual
ProSoft Technology, Inc. Page 61 of 78
September 1, 2010
4.6 Preset Single Register (Function Code 06)
Query
Function (06) allows the user to modify the contents of a holding register. Any
holding register that exists within the controller can have its contents changed by
this message. However, because the controller is actively scanning, it also can
alter the content of any holding register at any time. The values are provided in
binary up to the maximum capacity of the controller unused high order bits must
be set to zero. When used with Server address zero (Broadcast mode) all Server
controllers will load the specified register with the contents specified.
Note Functions 5, 6, 15, and 16 are the only messages that will be recognized as valid for
broadcast.
Adr Func Data Start Reg
Hi
Data Start Reg
Lo
Data #of Regs Hi Data #of Regs Lo Error Check Field
11 06 00 01 00 03 CRC
Response
The response to a preset single register request is to re-transmit the query
message after the register has been altered.
Adr Func Data Reg Hi Data Reg Lo Data Input Reg Hi Data Input Reg Lo Error Check Field
11 06 00 01 00 03 CRC