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12-4
[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."
(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."
* 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."
*Even if a own station PC has stopped operation normally or by an error, the JW-21MN turns "ON"
this flag while communicating.
When the parameter address 007777(8) of each slave station is set to
"01(H)," and at communicating with a master station normally.
When the parameter address 007777
(8) of each slave station is "00(H)."
When link start switch "00
(H)" of the master station is OFF.
Flag
Own
station
flag
Flag operation
Condition for flag operation
ON
OFF
Normal communication with each station.
Stopped communication or unable to
communication with each station.
Communication monitor flag (1) of the master
station is turned "OFF."
Flag operationCondition for flag operation
Flag
All stations
Other
station’s
flag
ON
OFF
Specific
station
Communication monitor flag (1) of the own station is turned "ON."
Communication monitor flag (1) of the own station is turned "OFF."
Each station is operating.
Each station stops operation (not by an error cause).
Communication monitor flag (1) of the own station
is turned "OFF."
Slave station that communication monitor flag (1)
is turned to "OFF."
Flag operation
Condition for flag operation
Flag
ON
Other
station’s
flag
Flag operation
Condition for flag operation
Flag
OFF
Not specified
Specific
station
All slave
stations
Own
station
flag
OFF
ON
Communication monitor flag (1) of the own station is turned "ON."
Communication monitor flag (1) of the own station is turned "OFF."
Own
station
flag
Flag operation
OFF
Condition for flag operation
Flag
Slave station that communication monitor flag (1) is
turned to "OFF."
Communication monitor flag (1) of the own station
is turned "OFF."
Any of the stations is faulty (caused to be stopped
abnormally).
All stations
Other
station’s
flag
Flag operation
Condition for flag operation
Flag
Each station is normal.
Specific
station
ON
OFF
ON
Not specified