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Rev Version 1.4.1
Rev Version 1.4.1
Expansion I/O
To configure a serial port for an expansion I/O device, click Serial on the menu and select Expansion I/O from the
Port Type drop-down list (see Figure 35). Configure the parameters described below.
Figure 35 Serial Configuration - Expansion I/O
Port Type
Select Expansion I/O from the drop down list.
Data Rate
Select the data rate to match that of the serial device that is connected and
communicating via the port. Baud rates available from 110 to 230400 baud.
Data Format
Defines the number of data bits, parity and start/stop bits used to communicate with
the serial device.
Flow Control
Flow control is used by some serial devices to regulate the flow of data by turning on/
off flags that are used to tell the connected serial devices to start or stop transmitting
data. The RS-232 supports CTC/RTS hardware flow control.
Maximum Device ID
to Poll
The maximum number of Modbus addresses that will be polled on the serial interface.
The default for RS-232 is one. Three addresses will be polled on the RS-485.
Save Changes
Save changes to non-volatile memory.
Save and Activate
Changes
Save changes to non-volatile memory and activate the process.
