User`s manual

7-16
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■ In case of remote I/O system using JW-21CM link module
A maximum of 8 special I/O modules can be installed in the JW-21RS remote I/O slave station.
The special I/O module will be assigned a place in the special I/O module relay area and the
special I/O parameter area by the setting of the Module No. switch (0 to 7) on the special I/O
module.
- The special I/O module relay area and special I/O parameter area for racks 0 to 7 are the same
as described on the previous page.
- When the JW-21CM is master station, up to 4 sets of JW-21RS can be connected, but up to 8
special I/O modules can be installed if they are used as slave stations. If the slave station are
different, duplicate module No. switches are not permitted.
- When others than JW-21CM are master station and JW-21RS is a slave station, special I/O
module cannot be installed in the slave station.
- The serial interface module JW-21SU cannot be used in the remote I/O slave station.
- If the ID control module JW-22DU or pulse output module JW-21PS is used in the remote I/O
slave station, the method of use is limited partly. (The F-85 and F-86 instructions cannot be
used.)
[2] Data memory for option, device net, and I/O link
See the user's manual for each modules.
JW-28KB
/38KB
● Example of system
0
1
2
3
4
5
6
7
ｺ0
4000 to ｺ0 4017
ｺ0 4020 to ｺ0 4037
ｺ0 4040 to ｺ0 4057
ｺ0 4060 to ｺ0 4077
ｺ0 4100 to ｺ0 4117
ｺ0 4120 to ｺ0 4137
ｺ0 4140 to ｺ0 4157
ｺ0 4160 to ｺ0 4177
T-80 (000 to 377)
T-81 (000 to 377)
T-82 (000 to 377)
T-83 (000 to 377)
T-84 (000 to 377)
T-85 (000 to 377)
T-86 (000 to 377)
T-87 (000 to 377)
Rack No.2
JW-38ZB
Rack No.1
JW-38ZB
Rack No.0
JW-318KB
JW-21CM
Max.7 sets
Max.8 sets
Max.8 sets
JW-21RS
Max.8 sets
Set value of
module No. switch
Special I/O
parameter area
Relay area for
special I/O module