
8. AUXILIARY FUNCTION
B–63173EN–1/01
304
3411 M code preventing buffering 1
3412 M code preventing buffering 2
3413 M code preventing buffering 3
3420 M code preventing buffering 10
[Data type] Byte
[Valid data range] 0 to 255
Set M codes that prevent buffering the following blocks. If processing
directed by an M code must be performed by the machine without
buffering the following block, specify the M code.
M00, M01, M02, and M30 always prevent buffering even when they are
not specified in these parameters.
NOTE
1 When a move command and miscellaneous function are
specified in the same block, the commands are executed in
one of the following two ways:
i) Simultaneous execution of the move command and
miscellaneous function commands.
ii) Executing miscellaneous function commands upon
completion of move command execution.
The selection of either sequence depends on the
sequence of PMC.
2 The block following M00, M01, M02 and M30, is not read
into the input buffer register, if present. Similarly, ten M
codes which do not buffer can be set by parameters (No.
3411 to 3420).
3 For M00 and M01 only, miscellaneous function code signal,
auxiliary function strobe signal, and M decode signals are
sent; the control of program stop and optional stop shall be
designed on the PMC side.
4 When the automatic operation is stopped by M02 or M30,
it is necessary to send the external reset signal from the
machine side to the CNC, instead of the FIN signal, When
the external reset signal is returned against the M02 or M30,
the control returns to the top of the program recently
executed and enters the reset state. When the FIN signal
is returned, the control returns to the beginning of the
program recently executed and executes it from the top.
Note