Mitsubishi Electric MELDAS C6 Interface Manual page 287

B con-
Signal name
tact
SPINDLE FORWARD RUN
—
INDEX
[Function]
Forward run indexing of the spindle is carried out.
[Operation]
(1) This signal turns ON after the "Spindle in-position (ORAO)" signal is output.
(2) Continuous indexing can be carried out by turning this signal ON and OFF while the "Spindle
orient command (ORC)" signal is ON.
(3) If this signal is turned ON before the "Spindle orient command (ORC)" signal is turned ON and
the "In-position (ORAO)" signal is output, first the "Spindle orient command (ORC)" signal will
turn ON, and the orientation will be completed at the position command value (R3221) read in.
Then, the spindle will be indexed to the position command value read in when this signal is
turned ON. If the position command value is the same when the "Spindle orient command
(ORC)" turns ON and this signal turns ON, the indexing operation will not be carried out.
(4) The index position command value (12-bit) is read in at the rising edge of this signal. Thus,
even if the index position command value is changed after this signal is input, the stop position
will not change.
(5) Even if this signal is turned OFF while the "Spindle orient command (ORC)" is ON, the spindle
will continue to stop at the position before this signal was turned OFF. Even if this signal is
turned OFF during the indexing operation, the spindle will stop at the position command value
read at the rising edge of this signal.
(6) If the stop point and index position command value are close (within the in-position range), the
"Spindle in-position (ORAO)" signal may not turn OFF and the indexing may be carried out.
(7) If the "Spindle orient command (ORC)" signal is turned OFF during indexing or when stopped,
the servo lock will turn OFF and the motor will coast. Orientation must be carried out again
when executing indexing again.
Multi-point orient position data
(index) (R3221)
Spindle orient command (ORC)
Spindle in-position (ORAO)
Spindle forward run index
(WRN)
Spindle speed waveform
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
WRN
Orienting operation
6-3-90
1st spindle 2nd spindle
YD3C YD6C
Index stop
Indexing operation
Orient stop
3rd spindle
YD9C
Index stop
Indexing operation