Serial Slave Connection

A processor has a maximum of two
Modbus
slaves using a serial connection, one per serial port. A controller with three processor modules supports up to six
Modbus
slaves using serial ports.
Serial Port
The serial port used for
Modbus®
communications. Possible value is one of the following: S1-1, S1-2, S2-1, S2-2, S3-1, or S3-2.
Name
Name of the
Modbus
slave.
Protocol
When using a serial port, the controller supports
Modbus
RTU.
ID
Represents the Slave ID for a serial connection. Possible values range from 1 to 247; the default value is 1.
Port
For serial connections, the Port field is disabled.
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