Mitsubishi Electric MELDAS C6 Programming Manual page 257

13. Program Support Functions
13.10 Macro interrupt
Returning from user macro interrupt
M99 (P__) ;
An M99 command is issued in the interrupt program to return to the main program. Address P is
used to specify the sequence number of the return destination in the main program. The blocks
from the one next to the interrupted block to the last one in the main program are first searched for
the block with sequence number Np2;. If it is not found, all the blocks before the interrupted one are
then searched. Control thus returns to the block with sequence number Np2; that is found first in
the above search.
(This is equivalent to M99P__ used after M98 calling.)
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