Clearing Data In Case Of Plc Cpu Stop - Mitsubishi MELSEC Q Series User Manual

4 FUNCTIONS
4.3.5 Clearing data in case of PLC CPU STOP (Slave station refresh/compulsory clear
setting in case of PLC CPU STOP)
Master station
Remote input (RX)
Station number 1
Station number 2
Station number 3
Station number 4
Remote output (RY)
Station number 1
Station number 2
Station number 3
Station number 4
Remote register
(RWw)
Station number 1
Station number 2
Station number 3
Station number 4
Remote register
(RWr)
Station number 1
Station number 2
Station number 3
Station number 4
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This function compulsorily clears output (send) data to slave stations when the PLC
CPU comes to STOP.
Remote output RY refresh device setting in the automatic refresh parameter dialog box
provides the following choices.
When "Y" is specified, the remote output RY is cleared regardless of the parameter
setting.
When specifying any device other than "Y" (e.g. M or L), make parameter setting
whether the remote output RY will be refreshed or compulsorily cleared.
When using GX Developer for setting, use Version 8.03D or later.
(1) Target output (send) data
The following shows the applicable buffer memory areas.
Remote I/O station
(station number 1)
Input
Output
The remote output RY is refreshed or compulsorily cleared according to the
setting when the PLC CPUs for the master and local stations come to STOP.
The remote input RX, remote register RWw and remote register RWr are
refreshed regardless of the setting when the PLC CPUs for the master and local
stations come to STOP.
Remote device station Local station
(station number 2) (station number 3)
Remote output (RY)
Station number 1
Station number 2
Remote input (RX)
Station number 3
Station number 4
Remote input (RX)
Station number 1
Station number 2
Remote output (RY)
Station number 3
Station number 4
Remote register
Station number 1
Remote register
Station number 2
(RWw)
Station number 3
Station number 4
Remote register
Station number 1
Remote register
Station number 2
(RWr)
Station number 3
Station number 4
Area of refresh/compulsory clear setting target
Area refreshed independently of setting
Local station
(station number 4)
Remote output (RY)
Station number 1
Station number 2
Station number 3
Station number 4
Remote input (RX)
Station number 1
Station number 2
Station number 3
Station number 4
Remote register
(RWr) (RWr)
Station number 1
Station number 2
Station number 3
Station number 4
Remote register
(RWw) (RWw)
Station number 1
Station number 2
Station number 3
Station number 4
MELSEC-Q
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