User`s manual

Remote I/O (master station) function
9-1
9
9-1 Remote I/O (master station) function
When the general purpose communication section in the JW-32CUM1 is used for remote I/O (as a master
station), it can communicate with remote I/O slave stations of JW and W series PLC.
Chapter 9: Remote I/O (Master Station) Function
PG/COMM1
PG/COMM2
L1
L2
SHLD
FG
DN - MCM - MCU
FLT
CM1
CM2
SCAN
OFF
ON
LT
PULL
JW-32CUM1 (master)
JW-21RS (slave)JW30H
JW-21RS (slave)
JW-21RS (slave) JW-21RS (slave)
Shielded-twist pair cable Total length max. 500 m 307.2 kbits/s Slave station: 4 sets max.
Item Specifications
Model name of the slave station
JW-21RS (JW20H/JW30H), ZW-501RS1 (W51),
ZW-160RS1 (W16), ZW-10RS1 (W10)
Number of connectable slave stations Max. 4 stations
Number of remote I/O points Total 512 points (64 bytes)
Number of I/O points per station 128 points (16 bytes)
- This function reduces wiring to a PC to a large extent.
- This function enables setting a master station away from a slave station. One signal cable between the
master station and the slave station enables communication of ON and OFF conditions of I/O by serial
communication. No program for controlling the communication is necessary because both the remote
master station and the slave module control the communication.
- Input/output modules that are installed on the remote I/O slave modules can be used as input/output
modules by the JW30H (JW-32CUM1), so that the number of input/output points can be increased.
- The remote I/O operation will start at the same time power is input to the programmable controller.
(There is no link start switch.)
- A maximum of 28 special I/O modules for the JW20H/30H can be installed in the master station (JW-
32CUM1) and a maximum of 8 modules (a total of 4 stave stations) in each slave station (JW-21RS).
Remarks
- The data memory area for remote I/O in the JW-32CUM1 (as a master station) is fixed (module
No. switch = 0). - See pages 9-2 and 9-4.
Therefore, set the module No. switch on the option modules (such as JW-22CM) that are installed
on the JW-34KBM (JW-32CUM1) to a number other than "0."
- When using the general purpose communication section of the JW-32CUM1 (as a master station)
for remote I/O, the JW-21CM cannot be installed as a remote I/O (master station) on the same
JW-34KBM basic rack panel.
- The ROM version of the slave module installed on for ZW-501RS1, ZW-160RS1, and ZW-10RS1
should be version 3.0 or later (applicable to the manual allocation), otherwise they do not operate.
- The following orders are not usable to I/O module installed to the remote I/O slave station.
F-80: I/O refresh, F-82: Refresh for special I/O
F-85: Read out from special I/O, F-86: Write into special I/O
So, you should note some types of special I/O module are not available to install to the slave
station, or have a restriction though able to install.
O: Available
: Have a restriction
x: Not available
Special I/O module Model name Availability
Analog input module JW-24AD O
Analog output module JW-22DA O
High-speed counter module JW-21HC O
ID control module JW-21DU/22DU
Pulse output module JW-21PS
Serial interface module JW-21SU x
DC input module JW-264N O
Transistor output module JW-262S O