REXROTH Fv Series, Instruction Manual

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CRC lower byte C5H
CRC higher byte F7H
End Transmission time for 3.5 bytes
Fig.12-5: Function 0x03_master request
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 03H
Bytes of data 04H
Higher byte of data in register 0100H 00H
Lower byte of data in register 0100H 05H
Higher byte of data in register 0101H 00H
Lower byte of data in register 0101H 00H
CRC lower byte EAH
CRC higher byte 32H
End Transmission time for 3.5 bytes
Fig.12-6: Function 0x03_slave response
● Function 0x06: Write a word.
Example: Write 0000H to communication register address 0006H of the slave
converter with address 01H. The frame structure is described in fig. 12-7
"Function 0x06_master request" on page 182 and fig. 12-8 "Function
0x06_slave response" on page 182 .
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 06H
Higher byte of write data 00H
Lower byte of write data 00H
CRC lower byte 69H
CRC higher byte CBH
End Transmission time for 3.5 bytes
Fig.12-7: Function 0x06_master request
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 06H
Higher byte of write data 00H
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Rexroth Frequency Converter Fv
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Communication Protocols