Bosch Rexroth EFC 3600, Operating Instructions Manual, Page: 181 / 238

CRC higher byte DAH
End Transmission time for 3.5 bytes
Fig.13-18: Function 0x10_Request from RTU master
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 10H
Higher byte of write register start address 01H
Lower byte of write register start address 14H
Higher byte of register number
00H
Lower byte of register number 02H
CRC lower byte 00H
CRC higher byte 30H
End Transmission time for 3.5 bytes
Fig.13-19: 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 0114H, write
00C8H and 00C8H to 2 continuous registers starting from address 0117H. The
frame structure is described in the tables below:
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
14H
Higher byte of read register number 00H
Lower byte of read register number 02H
Higher byte of write register start address 01H
Lower byte of write register start address 17H
Higher byte of write register number
00H
Lower byte of write register number 02H
Bytes of data for writing 04H
Higher byte of data in register 0109H 00H
Lower byte of data in register 0109H C8H
Higher byte of data in register 010AH 00H
Lower byte of data in register 010AH C8H
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600 Bosch Rexroth AG
Communication Protocols
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