Function 0X10: Write N Register Words, Range: 1; Function 0X17: Read/Write N Register Words, Range: 1 - Bosch Rexroth VFC 3210 Operating Instructions Manual

VFC 3210

Function 0x10: Write N register words, range: 1...16

Example: To modify 2 continuous registers start from 4000H with words 0001H
and 0000H with slave frequency converter address 01H. The frame structure is
described in the tables below:
Message start
Slave address
Modbus function code
Higher byte of write register start address
Lower byte of write register start address
Higher byte of register number
Lower byte of register number
Bytes of data
Higher byte of data in register 4000H
Lower byte of data in register 4000H
Higher byte of data in register 4001H
Lower byte of data in register 4001H
CRC lower byte
CRC higher byte
Message end
Tab. 14-18: Function 0x10_Request from RTU master
Message start
Slave address
Modbus function code
Higher byte of write register start address
Lower byte of write register start address
Higher byte of register number
Lower byte of register number
CRC lower byte
CRC higher byte
Message end
Tab. 14-19: Function 0x10_Response from RTU slave

Function 0x17: Read/Write N register words, range: 1...16

Example: To read data in 2 continuous registers starting from address 3000H,
write 0001H and 0000H to 2 continuous registers starting from address 4000H.
The frame structure is described in the tables below:
DOK-RCON04-VFC3210****-IT01-EN-P
Transmission time for 3.5 bytes
01H
10H
40H
00H
00H
02H
04H
00H
01H
00H
00H
93H
ACH
Transmission time for 3.5 bytes
Transmission time for 3.5 bytes
01H
10H
40H
00H
00H
02H
54H
08H
Transmission time for 3.5 bytes
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