Mitsubishi Electric MELDAS C6 Interface Manual page 289

B con-
Signal name
tact
SPINDLE ORIENT
—
COMMAND
[Function]
This signal is issued to the high-speed serial connection specification spindle controller (spindle
drive). When the signal is turned ON, the spindle is indexed in position.
[Operation]
If the "Spindle orient command" signal (ORC) turns ON during spindle rotation or when stopped, the
spindle will start orientation (stopping at set position). When positioning at the set position is
completed, the spindle in-position signal (ORA0) will be output, and orientation will stop.
During oriented spindle stop, the control system is under "servo lock" condition. Servo lock is
released when the signal (ORC1) is turned OFF during oriented spindle stop. When servo lock
must be maintained, the signal, therefore, should be kept turned ON.
The encoder or magnetic sensor method can be used for orientation.
The orientation rotation direction is determined with the parameters.
The orientation stop position is determined by the Z-phase for the encoder method, and by the
sensor installation position for the magnetic sensor method. The stopping position can be changed
with the following items when using the encoder method.
(1) By parameters (position shift amount)
(2) By multi-point orientation data (data specification) value
The timing chart for basic orientation is shown below.
Spindle orient command (ORC)
Motor speed
Spindle in-position (ORA0)
(Note 1) The spindle orient command (ORC) takes precedence over the spindle forward run start
(SRN) and spindle reverse run start (SRI) commands.
(Note 2) This signal is valid only for systems that are high-speed serially connected with the spindle
controller.
[Related signals]
(1) Multi-point orientation specification data (File register)
(2) Spindle in-position (ORA0: X996)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
ORC
6-3-92
1st spindle 2nd spindle
YD3E YD6E
3rd spindle
YD9E