Bosch Rexroth EFC 3600, Operating Instructions Manual, Page: 177 / 238

Slave
No.
0x10
Address of
1 st word
Number
of words
Number
of bytes
1 st word
value
–
Last word
value
CRC16
Hi | Lo Hi | Lo Hi | Lo Hi | Lo Lo | Hi
Fig.13-8: Function 16_Request from the master
Slave No. 0x10
Address of 1 st word
Number of words CRC16
Hi | Lo Hi | Lo Lo | Hi
Fig.13-9: Function 16_Response from the slave
Slave
No.
0x17
Address of 1 st
word to be read
Number of words
to be read
Address of 1 st word
to be written
Hi | Lo Hi | Lo Hi | Lo
Number of
words
to be written
Number of bytes
to be written
Value of 1 st word
to be written
–
Value of last word
to be written
CRC16
Hi | Lo Hi | Lo Hi | Lo Lo | Hi
Fig.13-10: Function 23_Request from the master
Slave No. 0x17
Number of
bytes read
1 st word
value read
–
Last word
value read
CRC16
Hi | Lo Hi | Lo Lo | Hi
Fig.13-11: Function 23_Response from the slave
Function codes example
● Function 0x03: Read N register words, range: 1 ~ 16.
Example: It is necessary to read 2 continuous words starting from communication
register 0100H of the slave frequency converter addressed at 01H. The frame struc‐
ture is described in the tables below.
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 03H
Higher byte of start address 01H
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600 Bosch Rexroth AG
Communication Protocols
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