January 2012 7.1 Display and Operation 1243
Interrupting an
NC program
The PLC or NC can stop execution of the NC program. After interruption, the
NC program is continued.
During program interruption, the axes can be traversed manually.
PLC stops NC program run:
The PLC executes an NC stop with PP_ChnNcStop.
NC stops NC program run:
The NC uses the following markers to inform the PLC of NC program
interruption and the reason for the interruption:
NN_ChnStopExtern: The program was interrupted because of an external
request (e.g. Stop key).
NN_ChnProgStopped: The program was interrupted because of a program
stop (M0), the end of a block in Single block mode, etc.
NN_ChnProgStoppedAsync: The program interruption was caused by an
error, etc.
PLC operand / Description Ty p e
PP_ChnNCStop
NC stop or cycle off
0: NC stop not active
1: NC stop active
M
PLC operand / Description Ty p e
NN_ChnNcStopExtern
NC stop or Cycle off
NC stop is executed by the NC.
0: NC stop not executed
1: NC stop was executed by the NC
M
NN_ChnProgStopped
NC program interruption
The NC reports an asynchronous program interruption,
such as at the end of a block in Single Block mode, M0,
etc.
0: No NC program interruption
1: NC program interruption
M
NN_ChnProgStoppedAsync
Asynchronous NC program interruption
The NC reports an asynchronous program interruption,
for example because of an error, etc.
0: No asynchronous NC program interruption
1: Asynchronous NC program interruption
M
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