Sharp JW-21MN manual Case of a master station, 12-3, Communication monitor flag

[2]In the case of a master station

(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
Own	When the parameter address 007777(8) of the master station is set to "01(H),"	ON
station	and the master station is operating normally.
flag
	When the parameter address 007777(8) of the master station is set to "00(H)."
(master		OFF
	Improper setting of parameter, BCC check error, or other errors.
station)

Flag	Condition for flag operation	Flag operation
Other	Normal communication with slave stations.	ON	Specific
			slave
	Stopped communication or unable to
stationÕs
flag	communicate with slave stations.	OFF	station
	Communication monitor flag (1) of the master
(01 to 77)			All slave stations
	station is turned "OFF."

The master station periodically executes communication recovery operation with the communication error slave station. When the error situation is recovered, the master station returns to normal communication.

(2)Operation condition monitor flag [1]

This flag is used to monitor the operation condition of slave stations 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
	Slave station is operating.	ON	Specific
			slave
Other	Slave station stops operation (not by an error cause).
stationÕs		OFF	station
	Communication monitor flag (1) of the master
			All slave stations
flag	station is turned "OFF."
(01 to 77)
	Slave station that communication monitor flag (1)	Not specified
	is turned to "OFF."

*Even if a master 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 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
(masterstation)	Communication monitor flag (1) of the master station is turned "OFF."	OFF

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

12

12-3