Preset Single Register - Function Code 06 - ABB COMMANDER 100 Operating Manual

...5 MODBUS FUNCTIONS
5.4 Preset Single Register – Function Code 06
5.4.1 Preset Single Register Query
The Preset Single Register Query modifies the contents of a holding register.
Note. Function codes 05, 06 and 16 are the only messages that are
recognized as valid for broadcast.
Example. Write the value 500 to holding register address 25 (proportional band 1
– heat) in slave 01.
Note. To write to a register, its offset address (one less than the register
number) must be used, e.g. to write to register 25, the offset address 24 (18H)
is transmitted.
Address Function
01 06
5.4.2 Preset Single Register Response
The response to a Preset Single Register Response requests is to retransmit the
query message after the register has been altered.
Example
Address Function
01 06
12
Register Register
Offset Offset
High Low
00 18
Register Register
Offset Offset
High Low
00 18
Data Data
Value Value
High Low
01 F4
Data Data
Value Value
High Low
01 F4
Error
Check (CRC-16)
Field
09 DA
Error
Check (CRC-16)
Field
09 DA