Omron Programmable Terminals NT631C - Manual (Page 129)

112
Connecting to the Host’s RS-422A/485 Port Section 5-2
2-wire or 4-wire selector (WIRE): (4-wire = RS-422A), or
(2-wire = RS-485)
Terminating resistance switch (TERM): ON (terminator ON = terminating
resistance enabled).
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.
m = DM 30000 + 100
× unit number
*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.
Using the High-speed NT
Link (1:N) Method 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.
*1
A CS1W-SCB41(-V1) Serial Communications Board or CS1W-SCU31-V1
Serial Communications Unit is required.
Allocated DM Area words Setting Setting Contents
Port 1 Port 2
m m+10 8200 1:N NT Link Mode
m+1 m+11
0000 to 0009 (*1) Baud rate (standard)
m+6 m+16 000 @ @ = The highest unit number
of the connected PTs (0 to
7)
4
2
PLC
Series
CPU Units with
Built-in NT Link
(1:1) Function
CPU Unit that becomes
connectable by installing a
Communications Board/Unit
Model
Name
CS
Series
CS1G-CPU42/43/44/45-E(V1)
(*1)
CS1H-CPU63/64/65/66/67-E(V1)
(*1)
CS1G-CPU42H/43H/44H/45H
(*1)
CS1H-CPU63H/64H/65H/66H/67H (*1)
CS1D-CPU65H/67H
(*2)
CS1G
CS1H
CS1D
CJ
Series CJ1G-CPU44/45 (*3)
CJ1G-CPU42H/43H/44H/45H
(*3)
CJ1H-CPU65H/66H/67H
(*3)
CJ1M-CPU11/12/13/21/22/23
(*3)
CJ1G
CJ1H
CJ1M