824
Serial Communications Instructions Section 3-23
Related PLC Setup Settings
The following PLC Setup settings must be made for the serial port 1 or serial
port 2 executing RXD(235). after setting the communications mode to no-pro-
tocol (RS-232C mode).
Auxiliary Area Flags
Setting Description
Communications Settings Standard
The standard settings are as follows: 9,600
baud, 1 start bit, 7-bit data, even parity, and
2 stop bits.
Custom Baud: 300, 600, 1,200, 2,400, 4,800,
9,600, 19,200, 38,400, 57,600, or
115,200 bps
Format: 7- or 8-bit data; 1 or 2 stop
bits; even, odd, or even parity
Start Code Disable ---
Set 00 to FF hex
End Code Received
Bytes
No ---
Yes 00 hex: 256 bytes
01 to FF hex: 1 to 255 bytes
End Code No ---
CR/LF ---
Set 00 to FF hex
Delay 0000 to 210F hex: 0 to 99,990 ms (10-ms units)
Name Address Contents
Serial Port 1 Reception
Completed Flag
A392.14 ON when the serial port has completed
the reception in no-protocol mode.
When the number of bytes was speci-
fied: ON when the specified number of
bytes is received.
When the end code was specified: ON
when the end code is received or 256
bytes are received.
Serial Port 2 Reception
Completed Flag
A392.06
Serial Port 1 Reception
Overflow Flag
A392.15 ON when a data overflow occurred dur-
ing reception through a serial port in
no-protocol mode.
.When the number of bytes was speci-
fied: ON when more data is received
after the reception was completed but
before RXD(235) was executed.
When the end code was specified: ON
when more data is received after the
end code was received but before
RXD(235) was executed.
ON when 257 bytes are received before
the end code.
Serial Port 2 Reception
Overflow Flag
A392.07
Serial Port 1 Reception
Counter
A394 Indicates (in hexadecimal) the number
of bytes of data received when the
serial port is in no-protocol mode.
Serial Port 2 Reception
Counter
A393
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