<8. Detailed Description>
8.2 Checking Specification of Serial
Communication
Serial communication for FCN-500 or FCN-RTU can be implemented by using the
serial port of the CPU module or by installing a serial communication module
(NFLR111, NFLR121) in the FCN-500.
● When Using Serial Port
Some items to be checked and precautions when using the serial port of an CPU
module for serial communication are described below.
- Serial port name
Names of COM ports are system-defined and not configurable by a user.
Serial communication port 1: COM1
Serial communication port 2: COM2 to COM4 (for FCN-RTU only)
- Confirm transmission specification and perform setup
Confirm the transmission specification for the serial port.
Perform the required setup from the FCN/FCJ maintenance homepage.
- Connecting to RS-422/485 communication equipment
If the remote equipment uses RS-422/485 interface, install a RS-232-C/
RS-422/485 converter between the serial port of the CPU module and the
remote equipment.
- Precautions when using FCN-500 configured with duplex CPUs
When an FCN-500 is configured with duplex CPUs, data transmitted via the
serial port of one CPU module is not copied to the other CPU.
As such, serial communication using COM port is not allowed for duplexed FCN-
500s, and serial communication modules should be used instead.
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