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4-1SectionConnecting to the RS-232C Port at the Host
75
When connecting PTs with model numbers 3 to 6 to port 1, for example, set the
value 8200 Hex to DM32000, 0000 Hex to DM32001, and 0006 Hex to
DM32006.
Connecting to CS1 Series Serial Communication Unit
A CS1 series backplane mounted type : CS1W-SCU21
Setting the Front Switches
Set the unit number of the serial communication 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 following.
Set the unit number to 0 through F so
that it will not overlap with the numbers
used in other units.
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
Allocation DM Area Settings for CPU
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. 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
command.
In the following, the channel numbers of the allocation DM area and settings are
shown.
m=DM30000+100*unit number (CH)
Allocation DM area (CH)
Writing Value
Settings
Port 1 Port 2
W
r
iti
ng
V
a
l
ue
S
e
tti
ngs
m m+10 8200 NT link (1:N) mode
m+1 m+11 0000 to 0009
(*1)
Communications baud rate
(standard)
m+6 m+16
000j
j = The largest model number of
the connected PT (0 - 7)
*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
Only the -V1 versions of OMRON’s CS1H and CS1G PCs support the high-
speed 1:N NT Link directly. Other CS1-series PCs can use the high-speed 1:N
NT Link indirectly through a CS1W-SCU21 Serial Communications Unit. (If a
Serial Communications Unit is used, even CS1-series Units without the “-V1”
suffix can be connected via high-speed 1:N NT Link.)
Be sure to check the model number of the PC and Serial Communications
Board/Unit before trying to establish the high-speed 1:N NT Link.
The following table shows which CS1-series PCs can be connected to an
NT31/NT31C with the high-speed 1:N NT Link.
CPU Units with Built-in
NT Link Function
CPUs Connectable only through a
Serial Communication Board or Unit
CS1G-CPU42/43/44/45-EV1
(*1)
CS1H-CPU63/64/65/66/67-EV1
(*1)
CS1G-CPU42/43/44/45-E(V1)
(*2)
CS1H-CPU63/64/65/66/67-E(V1)
(*2)
*1 The high-speed 1:N NT Link is not supported in a direct connection to the CPU
Unit of a CS1-series PC without the -V1 suffix.
*2 A CS1W-SCB21 or CS1W-SCB41 Serial Communication Board or
CS1W-SCU21 Serial Communications Unit is required.