User`s manual

Remote I/O (master station) function
9-4
9
[3] Data memory area
When using the remote I/O function (as a master station), the data memory in the JW-32CUM1 (control
section) allocates the remote I/O area, remote I/O operation flag, and individual flag as follows.
(1) Remote I/O area
The remote I/O area is allocated in groups of 16 bytes for each from slave station 1 to 4 (128 points),
as shown above.
When a ZW-10RS1 is the only type of slave station, 14 bytes are allocated for each station (112
points).
1. Any number of input/output module points (up to 128) can be specified on a slave station.
In the example below, two JW-212NA input modules and one JW-212SA output module are
installed on slave station 1 (JW-21RS)
Power supply
JW-21RS
JW-212NA
JW-212NA
JW-212SA
Empty slot
Module
installed
Relay number
assignment
Number of points occupied
(number of bytes)
JW-212NA 10000 to 10017
48 points (6 bytes)JW-212NA 10020 to 10037
JW-212SA 10040 to 10057
Empty slot Not used 80 points (10 bytes)
- Relay numbers 10000 to 10177 (128 points) are assigned for the remote I/O area of slave
station 1. The example above only uses relay numbers 10000 to 10057 (48 points), as input/
output relays. In this case, the remaining relay numbers, 10060 to 10177 (80 points), can be
used as auxiliary relays.
2. When a JW-21RS is used as a slave station, 16 points are used for each empty slot.
3. When using 32-point modules, be careful not to create an error by using too many points (128
points maximum).
An example using one 32-point module and five 16-point modules.
Power supply
JW-21RS
32-point module
16-point module
16-point module
16-point module
16-point module
Empty slot (16 points)
16-point module
Empty
Power supply
JW-21RS
32-point module
16-point module
16-point module
16-point module
16-point module
Empty slot (16 points)
Empty slot (16 points)
16-point module
← OK, since the total is 128 points.
← The total is 144 points. Since the number of I/O
points exceeds the maximum allowed (128), an
error occurs.
Remote I/O area Remote I/O operation flag
Individual flag
(Mode 2)
15000 15001 to 15004
ｺ1000 to ｺ1077 (64 bytes)
Slave station 1: ｺ1000 to ｺ1017 (16 bytes)
Slave station 2: ｺ1020 to ｺ1037 (16 bytes)
Slave station 3: ｺ1040 to ｺ1057 (16 bytes)
Slave station 4: ｺ1060 to ｺ1077 (16 bytes)