REXROTH Fv Series, Instruction Manual

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ModBus function code 10H
Higher byte of write register start address 01H
Lower byte of write register start address 09H
Higher byte of register number
00H
Lower byte of register number 02H
Bytes of data 04H
Higher byte of data in register 0109H 00H
Lower byte of data in register 0109H 3CH
Higher byte of data in register 010AH 00H
Lower byte of data in register 010AH 50H
CRC lower byte FEH
CRC higher byte 65H
End Transmission time for 3.5 bytes
Fig.12-11: Function 0x10_master request
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 10H
Higher byte of register start address 01H
Lower byte of register start address 09H
Higher byte of register number 00H
Lower byte of register number 02H
CRC lower byte 90H
CRC higher byte 36H
End Transmission time for 3.5 bytes
Fig.12-12: Function 0x10_slave response
● Function 0x17: Read/write N words, range: 1 ─ 16
Example: To read data in 2 continuous registers starting from address
0100H, write 0064H and 00C8H to 2 continuous registers starting from ad‐
dress 0109H. The frame structure is described in fig. 12-13 "Function
0x17_master request" on page 184 and fig. 12-14 "Function 0x17_slave re‐
sponse" on page 185 .
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 17H
Higher byte of read register start address 01H
Lower byte of read register start address 00H
Higher byte of read register number
00H
Lower byte of read register number 02H
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Rexroth Frequency Converter Fv
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Communication Protocols