Omron NT20S-ST121B-EV3 User Manual page 88

Connecting to the RS-232C Port at the Host
Peripheral port
This is used mainly for
connection to the
Programming Device.
(This also supports connection
of RS-232C devices.)
RS-232C port
This is used mainly for
connection of RS-232C
devices.
(This also supports the
connection of CX-
Programmer.)
Peripheral port
This is used mainly for
connection to the
Programming Device.
(This also supports connection
of RS-232C devices.)
Note
CS1G/H, CS1G/H-H
RUN
ERR/ALM
INH
PRPHL/COMM
SYSMAC CS1G
PROGRAMMABLE CONTROLLER
CPU42
OPEN
MCPWR
OPEN
PERIPHERAL
PORT
CJ1G
Connecting to a CS-series Serial Communications Board
Serial Communications Board equipped with a RS-232C port for CS-series
CPU Units: CS1W-SCB41/21
Serial Communications Boards and Serial Communications Units with lot
number 991220 (12/20/99) and later support the high-speed 1:N NT Link.
Boards and Units with earlier lot numbers cannot be used.
CPU Unit Allocation DM Area Settings
Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocated DM Area (PLC Setup) of the CPU
Unit. After the setting is written, it becomes effective by turning the power ON,
restarting the Unit, restarting the communications port, or execution of the
STUP instruction.
DIP switches (inside the battery storage)
• Set pin 4 to ON (establishing communications in
BUSY
accordance with PLC Setup) when connecting the
NT20 to the peripheral port.
• Set pin 5 to OFF (establishing communications in
accordance with PLC Setup) when connecting the
NT20 to the RS-232C port.
DIP switches (inside the battery storage)
• Set pin 4 to ON (establishing communications in
accordance with PLC Setup) when connecting
the NT20 to the peripheral port.
• Set pin 5 to OFF (establishing communications
in accordance with PLC Setup) when
connecting the NT20 to the RS-232C port.
RS-232C port
This is used mainly for connection of
RS-232C devices. (This also supports
the connection of CX-Programmer.)
Section 2-6
67