<8. Detailed Description>
● When Using Serial Communication Module
Some items to be checked and precautions when using serial communication
module for serial communication are described below.
The following settings can be specified for each port of the serial communication
module using Resource Configurator.
- Serial port name
The port name of a serial communication module comprises up to 24
alphanumeric, underscore (‘_‘) and hyphen (‘-‘) characters.
“COM1”, “COM2”,…,”COM9” are system-defined names and so cannot be
specified as user serial port names.
- Confirm transmission specification and perform setup
Confirm the following transmission specification items.
Connection type
(for NFLR121 only) : 2-wire system or 4-wire system
Transmission mode : Full duplex or half duplex
Baud rate (bps) : 300, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 38400, 57600, 76800, 115200
Data bits : 7-bit data or 8-bit data
Parity : NONE (no parity bit) ,
EVEN (even parity) or ODD (odd parity)
Stop bits : 1 stop bit or 2 stop bits
Monitoring of input
signal for sending : NONE, DSR, CD or DSR_CD
Flow control for receiving : NONE (Always set RTS)
RTS (Set RTS only on sending)
API notification on
communication error : YES (API notification on communication error)
NO (No API notification on communication error)
In NFLR111, the CD is used for the monitoring of the received input signal, and the
CS is used for the send flow control. The connection of these signal lines is
required.
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