
B-63323EN-1/03 5.AUTOMATIC OPERATION
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Basic procedure for regaining a manual intervention amount during automatic
operation
During automatic operation, a manual intervention amount can be
regained each time an M code for non-buffering is executed. The
sequence for regaining a manual intervention amount during automatic
operation is explained below, using an example that specifies such an
M code and a move command.
(1) Assume that G00 G91 Z-50.Mxxx is executed. (Mxxx must be
registered in advance as an M code for non-buffering.)
(2) Code signals M0 to M31 are output, and strobe signal MF is set to
1 at the same time. Moreover, Z-axis distribution is started.
(3) The PMC must read the code signals when the strobe signal is set
to 1, and the corresponding operation (which may be manual
intervention) must be performed. If the corresponding operation
should be performed after the completion of the move command
specified in the same block, wait for the distribution completion
signal DEN or IPEN to be set to 1. (The figure below shows an
example of waiting for the completion signal.)
(4) After completion of the corresponding operation, the PMC must
select absolute switch signal ABS and set manual intervention
amount regain request signal MIGET to 1 to regain a manual
intervention amount. Moreover, if functions such as a spindle-
speed function, tool function, and second auxiliary function are
specified at the same time, completion signal FIN must be set to 1
upon the completion of all of these functions.
(5) If the FIN signal is set to 1 for a minimum of a certain preset
period, the control unit sets strobe signal MF to 0 to post the
reception of the FIN signal.
(6) The PMC must set completion signal FIN to 0 when the strobe
signal is set to 0. At this time, the states of absolute switch signal
ABS and manual intervention amount regain request signal
MIGET must not be changed.
(7) When the FIN signal is set to 0, the auxiliary function sequence is
completed. Then, the control unit performs manual intervention
amount regain processing, then sets manual intervention amount
regain completion signal MIFIN to 1.
(8) To post the reception of the MIFIN signal, the PMC must set
manual intervention amount regain request signal MIGET to 0
when manual intervention amount regain completion signal
MIFIN is set to 1.
(9) The control unit sets manual intervention amount regain
completion signal MIFIN to 0 when manual intervention amount
regain request signal MIGET is set to 0. This completes the
manual intervention amount regain sequence during automatic
operation.
(10) The control unit starts reading the CNC command of the next
block.
An example of the manual intervention amount regain sequence during
the automatic operation described above is illustrated using a timing
chart, below.