Omron NS - REV 12 Setup Manual page 140

4-3 High-speed 1:N NT Link
Setting the Front Panel Switches
• Using RS-422A
Port 1
RS-232C
Port 2
RS-422A
Connecting to CS-series Serial Communications Units
CS-series Rack-mounted Type:
Reference
CPU Unit DM Area Settings
Write the settings directly from the Programming Device (Programming Console) or Support
Software (CX-Programmer) to the DM Area (Parameter Area) in the CPU Unit. After writing
the settings, enable the settings by turning ON the power again, restarting the Unit, restarting
the communications port, or executing the CHANGE SERIAL PORT SETUP (STUP) instruc-
tion.
The following table shows the allocated DM Area words and settings.
Using RS-232C
Allocated DM Area words
Port 1
DM m
DM m + 1
DM m + 6
Note: When connecting a single Unit in a 1:N connection, set the value of @ to 1 or higher.
Reference
4-24
CS1W-SCU21
CS1W-SCU31
High-speed 1:N NT Links can be used with Serial Communications Boards and Serial
Communications Units from lot numbers 991220 (December 20, 1999) or later. Boards
and Units with earlier lot numbers cannot be used, so confirm that the lot number is sup-
ported.
Port 2
DM m + 10
DM m + 11
DM m + 16
To set high-speed 1:N NT Link communications from the CX-Programmer, set the baud
rate to 115,200 bps.
Terminating resistance switch (TERM)
Set to ON:
Terminating resistance used
(right position)
Two-wire/four-wire switch (WIRE)
For RS-422A:
Set to 4 for four-wire (right position).
Write value
8200 1:N NT Link Mode
000A Baud rate (high-speed)
@: Largest unit number (1 to 7) of the connected
000@
PTs. (See note.)
m = 30000 + 100 × unit number
Settings