User`s manual

Remote I/O (master station) function
9-5
9
4. When you want to install a special I/O module on a JW-21RS slave station, use a special I/O
relay as the data area. To specify the area, use the module No. switch on the special I/O
module.
Special I/O relay
The number of special I/O
modules installed on a
remote I/O slave station
A maximum of 8 modules can be installed (total for 4
slave stations)
Remarks
-Donot duplicate a module No. switch setting on a
special I/O module that is already installed on a slave
station (max. 4 modules). If the module number is
duplicated, a setting error will occur and the system
will not function.
Setting for the module
No. switch
Byte address
0
1
to to
7
ｺ4000 to ｺ4017
ｺ4020 to ｺ4037
ｺ4160 to ｺ4177
(2) Remote I/O operation flag, individual flag (Mode 2)
The communication status of all the slave stations and each slave station can be monitored
individually using these flags.
- Individual flags for slave stations 1 to 4 are only functional when the operation mode is "Mode 2."
- See page 9-3.
Remote I/O
operation flag
Individual flag
(Mode 2)
15000 15001 to 15004
Relay
number
Description
15000
Turns ON when communication
with all slave stations is normal.
15001
Turns ON when communication
with slave station 1 is normal
15002
Turns ON when communication
with slave station 2 is normal
15003
Turns ON when communication
with slave station 3 is normal
15004
Turns ON when communication
with slave station 4 is normal