Omron Programmable Terminals NT631 Setup Manual page 129

Connecting to the Host's RS-422A/485 Port
Using the High-speed NT
Link (1:N) Method
112
2-wire or 4-wire selector (WIRE):
Terminating resistance switch (TERM): ON (terminator ON = terminating
DM Area Allocation Settings
From the Programming Device (i.e., a Programming Console or CX-Program-
mer), write the settings directly to the CPU Unit's DM Area Setup Area. After
the settings have been written, they will be enabled when the power supply is
cycled, the Unit is restarted, the communications port is restarted, or a STUP
instruction is executed.
The DM Area words that are allocated and the contents of the settings are
given in the following table.
Allocated DM Area words
Port 1 Port 2
m m+10
m+1 m+11
m+6 m+16
*1
Set any value between 0000 and 0009 hex for the baud rate. The same
baud rate will be used regardless of the value as long as it is between 0000
and 0009 hex.
Compatible Host Units
Only OMRON's CS/CJ-series PLCs support the high-speed 1:N NT Link
through RS-422A/RS-485. The high-speed 1:N NT Link must be established
through a Serial Communications Board/Unit. (Even CS/CJ-series Units with-
out the "-V1" suffix can be connected via a high-speed 1:N NT Link by mount-
ing a Serial Communications Board/Unit.)
Be sure to check the model number of the PLC and Board/Unit before trying
to establish the high-speed 1:N NT Link.
The following table shows which CS-series PLCs can be connected to an
NT631/NT631C with the high-speed 1:N NT Link through RS-422A/RS-485.
PLC CPU Units with
Series Built-in NT Link
(1:1) Function
CS
Series
CJ
Series
*1
A CS1W-SCB41(-V1) Serial Communications Board or CS1W-SCU31-V1
Serial Communications Unit is required.
(4-wire = RS-422A), or
4
(2-wire = RS-485)
2
resistance enabled).
m = DM 30000 + 100 × unit number
Setting
8200 1:N NT Link Mode
(*1) Baud rate (standard)
0000 to 0009
000@ @ = The highest unit number
of the connected PTs (0 to
7)
CPU Unit that becomes
connectable by installing a
Communications Board/Unit
CS1G-CPU42/43/44/45-E(V1)
CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/67H
(*2)
CS1D-CPU65H/67H
(*3)
CJ1G-CPU44/45
CJ1G-CPU42H/43H/44H/45H
(*3)
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/21/22/23
Section 5-2
Setting Contents
Model
Name
(*1) CS1G
CS1H
(*1)
CS1D
(*1)
(*1)
CJ1G
CJ1H
(*3)
CJ1M
(*3)