[3]In the case of slave station 01 to 77(8)

(1)Communication monitor flag

This flag is used to monitor the communication condition with other stations. Non-connected station keeps this flag as "OFF."

Flag

Condition for flag operation

Flag operation

 

When the parameter address 007777(8) of each slave station is set to

ON

Own

"01(H)," and at communicating with a master station normally.

 

station

When the parameter address 007777(8) of each slave station is "00(H)."

 

flag

 

OFF

When link start switch "00(H)" of the master station is OFF.

 

 

 

 

 

Flag

Condition for flag operation

Flag operation

Other

Normal communication with each station.

ON

Specific

Stopped communication or unable to

 

 

station

station’s

communication with each station.

 

OFF

 

flag

 

 

Communication monitor flag (1) of the master

 

 

All stations

 

 

 

station is turned "OFF."

 

 

 

 

(2)Operation condition monitor flag [1]

This flag is used to monitor the operation condition 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

 

 

 

OFF

flag

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

Flag

Condition for flag operation

Flag operation

 

Each station is operating.

ON

Specific

 

 

 

Other

Each station stops operation (not by an error cause).

 

station

station’s

 

OFF

 

Communication monitor flag (1) of the own station

 

All slave

flag

is turned "OFF."

 

 

stations

 

 

 

Slave station that communication monitor flag (1)

Not specified

 

is turned to "OFF."

 

 

 

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*Even if the own station PC has stopped operation normally or by an error, the JW-21MN turns "ON" this flag while communicating.

(3)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

 

 

 

 

flag

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

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-21MN turns "ON" this flag while communicating.

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