REXROTH EFC 3600 - Page 204

Function 0x06: Write one register word
Frequent writing may damage the internal regis-
ters!
CAUTION
● When data is written into the internal registers, there is a limit on the writing
times. The register address may be damaged once the writing times is beyond
the writing limit. So please avoid frequent writing!
● For details of user writing permission, please see chapter 17.2.1 "Description
of Attribute Symbols in Parameter Tables" on page 220.
Example: Write 0000H to communication register address 0005H of the slave
frequency converter with address 01H. The frame structure is described in the
tables below:
Message start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 06H
Higher byte of write register address 00H
Lower byte of write register address 05H
Higher byte of write data 00H
Lower byte of write data 00H
CRC lower byte 99H
CRC higher byte CBH
Message end Transmission time for 3.5 bytes
Tab. 13-15: Function 0x06_Request from RTU master
Message start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 06H
Higher byte of write register address 00H
Lower byte of write register address 05H
Higher byte of write data 00H
Lower byte of write data 00H
CRC lower byte 99H
CRC higher byte CBH
Message end Transmission time for 3.5 bytes
Tab. 13-16: Function 0x06_Response from RTU slave
Bosch Rexroth AG
Communication Protocols
EFC 3600
190/259
DOK-RCON03-EFC-3600***-IT03-EN-P