Bosch Rexroth EFC 3600 Operating Instructions Manual page 186

Bosch Rexroth AG
Communication Protocols
13.2.5 ModBus Communication Example
One slave address is 01H. The frequency setting of the frequency converter has been
set to "Given via communication" and the RUN command source is set to "Inputting
commands via communication". It is required for the motor connected to the frequency
converter to run with 50Hz (forward rotation). The operation can be achieved with func‐
tion 0x10 (function 16) of the ModBus protocol. The messages of the requests from the
master and responses from the slave are shown in table below:
● Example 1: Start 01# frequency converter for forward rotation at frequency of 50.00
Hz (represented by 5000 internally)
Slave
address
Request 0x01
Response 0x01
● Example 2: Read the output frequency of 01# frequency converter and output veloci‐
ty
Slave
address
Request 0x01
Response 0x01
● Example 3: Stop 01# frequency converter according to the stopping mode with the
function code
Slave
address
Request 0x01
Response 0x01
13.2.6 Special Notes
1. The external computer can not write to function codes [b0.06] "Parameter replica‐
tion", [b0.30] "running monitoring display" and [b0.31] "Stop monitoring display".
2. [b0.00] "User password" and [b0.05] "Parameter initialization" do not support mul‐
tiple write including single write in multiple write; Motor nameplate parameters
and motor physical data should not be modified simultaneously; Multi-function
digital input terminals ([E0.01] ~ [E0.05]) writing operation do not permit repeated
nonzero value.
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Start
Function
code
address
0x10 0x4000
0x10 0x4000
Start
Function
code
address
0x03 0x0D04
0x03 N/A
Start
Function
code
address
0x06 0x4000
0x06 0x4000
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
Number of Bytes
address of data
0x0002 0x04
0x0002 N/A
Number of Bytes
address of data
0x0002 N/A
N/A 0x04
Number of Bytes
address of data
N/A N/A
N/A N/A
Data
CRC
code
content
0x0001
0xFA9E
0x1388
N/A 0x0854
Data CRC
content code
N/A 0x6687
0x00E2
0x9BCA
0x0015
Data CRC
content code
0x0008 0xCC9D
0x0008 0xCC9D