4. DESCRIPTION OF PARAMETERS
B–63980EN/01
10
NOTE
1 An input/output device can also be selected using the setting screen. Usually, the setting screen
is used.
2 The specifications (such as the baud rate and the number of stop bits) of the input/output
devices to be connected must be set in the corresponding parameters for each interface
beforehand. (See Section 4.2.) I/O CHANNEL = 0 and I/O CHANNEL = 1 represent input/output
devices connected to RS–232C serial port 1. Separate parameters for the baud rate, stop bits,
and other specifications are provided for each channel.
3 The input/output unit interface may be referred to as the reader/punch interface.
RS–232C serial port 1 and RS–232C serial port 2 are also referred to as channel 1 and channel
2, respectively.
Mother board
RS–232–C serial port 1
R232–1(JD36A)
RS–232–C serial port 2
R232–2(JD36B)
R422-1(JD6A)
R232-3(JD28A)
Serial communication board
DNC2 board
I/O CHANNEL=0, 1
(Channel 1)
I/O CHANNEL=2
(Channel 2)
I/O CHANNEL=3
(Channel 3)
RS-232-C I/O device
RS-232-C I/O device
RS-232-C I/O device
(when a remote buffer or DNC2 board is used)
0021 Setting of the output device in the foreground
0022 Setting of the input device in the background
0023 Setting of the output device in the background
These parameters can be set at “Setting screen”.
[Data type] Byte
[Valid data range] 0 to 2, 5, 10
These parameters are valid only when bit 0 (IO4) of parameter No. 110 is
set to control the I/O channels separately.
The parameters set individual input/output devices if the I/O channels are
divided into these four types: input and output in the foreground and input
and output in the background. The input device in the foreground is set in
parameter No. 20. For the details of the settings, see the table provided
with the description of parameter No. 20.
NOTE
If different input/output devices are simultaneously used in
the foreground and background, just a value from 0 to 2 can
be specified for the background device.
If an attempt is made to use a busy input/output device, an
alarm (P/S233 or BP/S233) will be raised. Note that the
settings 0 and 1 indicate the same input/output device.