69
Connecting to the RS-232C Port at the Host Section 4-1
Setting the Front Switches
Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
so that the values or symbols in the setting value window agree with the fol-
lowing.
Allocation DM Area Settings for CPU Unit
Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) 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 execu-
tion of the STUP command.
In the following, the channel numbers of the allocation DM area and settings
are shown.
m=DM30000+100*unit number (CH)
*1
Set any value between 0000 and 0009 Hex for the communications 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
The high-speed 1:N NT Link method can be used with version 1 (-V1) and
high-speed versions (H) of the CS-series CPU Units and any versions of the
CJ-series CPU Units. Furthermore, the high-speed 1:N NT Link method can
be used with earlier versions of CS-series CPU Units by installing the latest
version of a Serial Communications Board or Serial Communications Unit.
(CJ-series PLCs can also be connected to a high-speed 1:N NT Link through
a Serial Communication Unit.)
Be sure to check the model number of the PLC and Serial Communications
Board/Unit before trying to establish the high-speed 1:N NT Link.
Allocated DM Area words Setting Setting Contents
Port 1 Port 2
m m+10 8200 NT link (1:N) mode
m+1 m+11
0000 to 0009
(*1)
Communications baud rate (stan-
dard)
m+6 m+16 000@@ = The largest model number of
the connected PT (0 – 7)
SCU21
RUN
ERC
SD1
RD1
RDY
ERH
SD2
RD2
No.
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
UNIT
Set the unit number to 0 through F so
that it will not overlap with the numbers
used in other units.
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