Ruck ETA K 1200 V W, Assembly And Operating Manual

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40
English
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11. Modbus communication interface
11.1. Wiring diagram
11.2. Functions implemented
Function
code
Name Description
03 Hex Read Hold Register Read device parameter
04 Hex
Read Input Register
Read current value
06 Hex Write Single Register Write device parameter word by word
10 Hex Write Multiple Register Write several device parameters word by word
Function
code
Name Sub-function Description
08 Hex Return Query Dat 00 Send the received message back
08 Hex
Restart Communications 01
Restart communication
08 Hex Force Listen Only Mode 04 Switch to listen-only mode
Fig. 26:
Control unit
120 Ohm Line
Place Jumper K 1 for the last
device on the bus
Signal line B with 10 kOhm
to GND
Signal line A with 10 kOhm to
+24 V
1.
Line