Ruck ETA K 1200 F O, Сборка и руководство по эксплуатации, Страница: 46 / 68

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11. Modbus communication interface
11.1. Wiring diagram
11.3. 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. 27
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
11.2. Interface information
The device works as a Modbus RTU slave. The interface configuration is 8N1, 9600Baud, slave
address 1. The address and the baud rate can be set via parameters P7 and P8. As bus line is re -
commended a twisted pair data cable with 120 Ohm impedance.