Omron NT21 - SETUP MANUAL 10-2001 Setup Manual page 95

Connecting to the Host's RS-422A/485 Port
Reference: Serial Communications Boards and Serial Communications Units with lot num-
84
Unit. After the settings are written, they become effective by turning the power
ON, restarting the Unit, restarting the communication port, or execution of the
STUP instruction.
In the following table, the relevant word addresses allocated in the DM Area and
settings are shown.
Allocated DM word
Writing Writing
Value
Port 1
DM32000 8200
DM32001 000A
DM32006 000j
For example, when connecting PTs with model numbers 3, 4, 5, and 6 to port 1,
set DM 32000 to 8200 Hex, DM 32001 to 000A Hex, and DM 32006 to 0006 Hex.
Connecting to a CS-series Serial Communications Board
Serial Communications Board equipped with an RS-422A/485 port for CS-se-
ries CPU Units:
CS1W-SCB41 (Port 2 is an RS-422A/485 port.)
ber 991220 (12/20/99) and later support the high-speed 1:N NT Link. Boards and
Units with earlier lot numbers cannot be used.
Setting the Front Switches
RDY
COMM1
COMM2
Port 1
RS-232C
OFF ON TERM
2
4
Port 2
RS-422A/485
SCB41
CPU Unit Allocated DM Area Settings
Setting is written from the Programming Device (a Programming Console or CX-
Programmer) directly into the allocated DM Area settings (PC Setup) of the CPU
Unit. After the setting is written, it becomes effective by turning the power ON,
restarting the Unit, restarting the communication port, or execution of the STUP
instruction.
1:N NT Link mode
Communications baud rate (high-speed)
j = The largest model number of the
connected PTs (0 to 7)
PORT1
Terminator Switch (TERM)
Set to ON (right side)
WIRE
Wire Selection Switch (WIRE)
PORT2
RS-422A: Set to 4 (right side) for 4-wire.
(RS422/
RS-485: Set to 2 (left side) for 2-wire.
RS485)
Section 5-1
Settings Settings