Omron Programmable Terminals NT31 NT31C Setup Manual page 119

Connecting to the Host's RS-422A/485 Port
Reference:
108
Setting the Front Switches
I/O port selector switch
RS-232C
RS-422A
C200HX/HG/HE(-Z)E, CPM1, CPM2A, CPM2C, CQM1H, or SRM1
The connection method depends upon the model of PC being used, as shown in
the following table.
PC model
• Connect to the RS-422A port (port A) on a Communications
C200HX/HG/HE(-Z)E
• Connect to the RS-422A port (port 2) on a Serial Commu-
CQM1H
• Connect to the peripheral port through a CPM1-CIF11
CPM1
• Connect to the peripheral port through a CPM1-CIF11
CPM2A, SRM1
• Connect to the peripheral port (on a CPM2C-CN111 or
CPM2C
(The CPM2C-CN111 splits the Unit's Communication Port
into a RS-232C port and a peripheral port.)
S There are no Communication Boards for the C200HX/HG/HE(-Z)E in which
port B is the RS-422A port.
S There are no Serial Communication Boards for the CQM1H in which port 1 is
the RS-422A port.
PC Setup Area Settings
When connecting to a C200HX/HG/HE(-Z)E or CPM1, CPM2A, CPM2C,
@ Host link communication method
selection (selector switch)
Set this to RS-422A.
@ Communication type setting (DIP SW3)
Set SW3 to OFF.
(for host link communication)
@ Host link default value settings
(DIP SW4)
To effect the existing DIP switch
settings, set SW4 to ON.
To effect the values set in the PC Setup,
set SW4 to OFF.
Note
For CPUs manufactured before or
during June 1995 (lot No. jj65), the
existing DIP switch settings differ from
the PC Setup default values as follows.
- Existing DIP switch settings:
2,400 bps, 1 stop bit, even parity, 7 bit
data length
- PC Setup default values:
9,600 bps, 2 stop bits, even parity, 7
bit data length
For CPUs manufactured from July 1995
onward (lot No. jj75), the stipulated
values in the DIP switch settings also
are 9600 bps and 2 stop bits.
@ Terminator setting (DIP SW6)
Set this switch to ON.
(Set terminator ON.)
Connection method
Board.
nications Board.
RS-422A Adapter.
RS-422A Adapter.
CS1W-CN114 Connecting Cable) through a CPM1-CIF11
RS-422A Adapter.
Section 5-2