Mitsubishi Electronics SW1D5-EXP-O-E Frozen Dessert Maker User Manual


 
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MELSOFT
7 MANAGEMENT OF DATA IN THE PLC CPU
POINT
• Remote operation is valid when the PLC is in the RUN state.
However, since the remote operation setting is memorized when the key switch is
set to STOP, on setting the key switch to RUN, the state set in remote operation
applies.
For example, if remote operation is set to STOP while the key switch is at STOP,
the PLC will remain in the STOP state even if the key switch is set to RUN.
Similarly, if STEP-RUN is set in remote operation while the key switch is set to
STOP, when the key switch is set to RUN the PLC enters the STEP-RUN state.
In this kind of case, the RUN state has to be established by remote operation.
If there is any disagreement in the key switch, remote operation, and remote
RUN/PAUSE contact operations at the PLC, the following order of priority applies.
Operations to the PLC Priority
STOP 1
PAUSE 2
STEP-RUN 3
RUN 4
• The QnACPU operation is determined by the combination of the key switch
position and remote operation as follows.
Remote
Operation
Key switch
RUN STEP-RUN PAUSE STOP RESET
1 Latch clear
RUN RUN STEP-RUN PAUSE STOP
Operation not
possible
2
Operation not
possible 2
STOP STOP STOP STOP STOP RESET Latch clear
1 : Remote reset must be enabled by PLC system setting in the PLC parameters.
2 : Operation possible when set to STOP by remote operation.
• When removing the memory card, turn on SM605.
The PLC CPU will result in an error if you remove the memory card that is not
enabled for removal.