User`s manual

10-7
Data link DL1 (master station) function
10
(2) Communication monitor flag
The communication operation of the data link DL1 can be monitored using communication monitor
flag (15000 to 15017).
11
11
1 Communication monitor flag for the master station (JW-32CUM1)
While the JW-32CUM1 (as a master station) is communicating with slave stations, the
communication monitor flag (15000) in the master station is ON. The operation of the
communication monitor flag for the master station is as follows.
Communication
monitor flag
Operation condition Operation
15000
The master station is operating normally. ON
Link operation stopped.
OFF
Hardware error in the JW-32CUM1.
Remarks
- The communication monitor flag is used to show the operation of master station. Even if a slave
station has an error, this flag will remain ON as long as the master station is still normal.
- If the master station cannot communicate with a certain slave station, the master station will
execute a recovery operation for the slave station in error once every three cycles of the data link
operation. When the error slave station returns to normal operation, the master station will stop
sending recovery signals to the slave station.
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22
2 Communication monitor flag for slave stations 01 to 17
(8)
While the JW-32CUM1 (as a master station) is communicating with slave stations, the
communication monitor flags (15001 to 15017) for each of the slave stations will be ON. The
operation of the communication monitor flag for the slave stations is shown below.
Communication monitor
flag
Operation condition Operation
Slave station 01 --- 15001
Slave station 02 --- 15002
to
Slave station 17 --- 15017
Communicating normally with each slave station
while the master station flag (15000) is ON.
ON
Individual
slave stations
Link operation stopped due to an error in the
slave station programmable controller.
OFF
Hardware error in the JW-32CUM1.
Switch setting error in the JW-32CUM1.
Slave station programmable controller
stopped.
Not connected.
Master station flag is OFF. OFF
All slave
stations
Communication monitor flag
15000 to 15017
Relay number Detail
15000 Operation of master station
15001 Operation of slave station 01
15002 Operation of slave station 02
to to
15016 Operation of slave station 16
15017 Operation of slave station 17