·Operation condition monitor flag [2]

This flag is used to monitor the abnormal stop of each slave station when the communication with each slave 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 master station is turned “ON.”

ON

station flag

 

 

(master

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

OFF

station)

 

 

Flag

Condition for flag operation

Flag operation

 

Each slave station is normal.

ON

Specific

 

 

 

slave

Other

Any of the slave stations is faulty (caused to be

 

station’s

stopped abnormally).

OFF

station

flag

Communication monitor flag (1) of the master station

All slave

 

(01 to 77)

is turned “OFF.”

 

stations

Slave station that communication monitor flag (1) is

Not specified

 

 

turned to “OFF.”

 

 

 

 

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

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