Mitsubishi Electric M800VW Series Programming Manual page 891

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.36 External Search
Timing chart
The timing chart for the program return is shown below.
Program return signal
(PLC -> NC)
Processing program return
(NC internal state)
Program return completed signal
(NC -> PLC)
Program return complete status
(NC -> PLC)
Program return complete status
The correspondence of the program return complete status values and details output from the NC based on the result of
returning to the machining program before the external search is shown below.
Status value
0 Normally finished
1 Function is invalid
Program return was attempted during the operation,
2
reset, or emergency stop.
Program return is disabled because the external
3 search has not been performed or due to any re-
striction.
IB-1501668-B
Details
Check the parameter setting
Input the signal after stopping the program oper-
ation.
Confirm the cancellation of the emergency stop
or reset, and then input the signal.
Execute the external search first, and then input
the signal.
Do not execute a function that is restricted after
the external search.
870
Remedy
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