Mitsubishi Electric MELDAS C6 Interface Manual page 285

B con-
Signal name
tact
SPINDLE FORWARD RUN
—
START
[Function]
This signal is issued to the high-speed serial connection specification spindle controller (spindle
drive). When the signal turns ON, the spindle motor starts rotating in normal direction (CCW as
viewed from the shaft side).
[Operation]
Spindle motor starts running at speed specified by S command (S analog data) when the spindle
forward run start signal (SRN) is turned ON.
When the spindle forward run start signal is turned OFF, spindle motion decelerates and stops
(transistor base current is shut off).
(1) Spindle motor stops if "Spindle forward run start" signal (SRN) and "Spindle reverse run start"
signal (SRI) are turned ON at the same time. To resume forward run, both signals OFF once
and then turn the spindle forward run start signal ON.
(2) The operation may stop during forward run due to emergency stop, spindle alarm or resetting.
Turn the spindle forward run start signal OFF and ON once after the "Servo ready" signal (SA)
turns ON.
(3) The motor will not run if the S analog data is 0. The motor will run at the corresponding rotation
speed when the S analog data changes.
(4) When "Spindle orient command" signal (ORC) is turned ON at the same as "Spindle forward
run start" signal (SRN) is turned ON, priority is given to the former signal.
[Related signals]
(1) Spindle reverse run start (SRI: YD39)
(2) Spindle orient command (ORC: YD3E)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
SRN
6-3-88
1st spindle 2nd spindle
YD38 YD68
3rd spindle
YD98