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Serial Communication
Modbus RTU Slave
Function Description
The serial communication using Modbus RTU (slave) with the device is executed via the RS485 interface.
Configuration via Web Pages
Configuration of the Serial Communication with Modbus RTU (Slave) via RS485 Interface
Precondition: The Modbus RTU protocol must have been activated for the RS485 interface.
To change the Modbus RTU (slave) settings in the Configuration tab, proceed as follows:
•
In the navigation window, click Communication serial and select Modbus RTU as the Bus protocol.
[sc_config_Modbus_RTU, 1, en_US]
Figure 2-35
Configuration Tab, Modbus RTU (Slave)
•
Configure the respective parameters according to the following table.
Table 2-21
Settings for Communication Serial, Modbus RTU (Slave)
Parameter
Default Setting
Setting Range
Bus protocol
Modbus RTU
None
Modbus RTU
(slave)
IEC 60870-5-103
Device address
1
1 to 247
Baud rate
19 200 bit/s
1200 bit/s, 2400 bit/s,
4800 bit/s, 9600 bit/s,
19 200 bit/s, 38 400 bit/s,
57 600 bit/s, 115 200 bit/s
2.7
2.7.1
2.7.1.1
2.7.1.2
Basic Functions
2.7 Serial Communication
74
SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
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