·Operation condition monitor flag [2]

This flag is used to monitor the abnormal stop of each station when the communication with each station is normal.

Non-connected station keeps this flag as “OFF.”

Flag

Condition for flag operation

Flag operation

Own

Communication monitor flag (1) of the own station is turned “ON.”

ON

station

 

 

Communication monitor flag (1) of the own station is turned “OFF.”

 

flag

OFF

 

 

 

Flag

Condition for flag operation

Flag operation

 

Each station is normal.

ON

Specific

 

Any of the stations is faulty (caused to be stopped

 

Other

 

station

abnormally).

OFF

station’s

 

Communication monitor flag (1) of the own station

 

 

 

flag

is turned “OFF.”

 

All stations

 

Slave station that communication monitor flag (1) is

Not specified

 

turned to “OFF.”

 

 

 

Even if a own station PC has stopped operation normally or by an error, the JW-20CM turns “ON” this flag while communicating.

9

9·59