3. If the communication protocol is changed, baud rate, data frame and local ad‐
dress will be restored to factory default.
4. The read response of user password and manufacture password is "0000" in
case of external computer reading.
5. The external computer can set, modify or cancel user password, the specific op‐
eration is same to the situation when "Running command source" is from key‐
board.
6. The access to control registers and state registers is not limited by user pass‐
word.
13.2.7 Communication Networking
Networking
The communication network is shown in figure below, with a PC, a PLC or an external
computer and various frequency converters, which are connected by shielded twisted
pair cables via RS232/485 adapters. The slave at the end of the network needs a termi‐
nation resistor with recommended value of 120 Ω, 0.25 W.
Fig.13-2: Communication networking
Cables may only be connected when the frequency
converter is turned off!
Recommendations on networking
● Use shielded twisted pair cable to connect RS485 links.
● ModBus cable should be adequately away from power cables (30 cm in minimum).
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
Bosch Rexroth AG
Communication Protocols
185/235
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