Mitsubishi Electric MELDAS C6 Interface Manual page 157

B con-
Signal name
tact
—
SPINDLE SERVO-ON
[Function]
This signal is output from the high-speed serial connection specification spindle controller (spindle
drive) and informs that the spindle is under the position control state (synchronous tap control, etc.).
[Operation]
The "Spindle servo-ON" signal (SSA) turns ON when the spindle is ready (SMA signal is ON), the
servo-ON command has been transferred from the controller to the spindle controller, and the
spindle controller is in the servo-ON state.
This signal (SSA) turns OFF when the servo-ON command is canceled.
Spindle servo-ON command
(Note 1)
Spindle servo-ON (SSA)
(Note 1) The "Spindle servo-ON" command is output from the controller to the spindle controller,
and is mainly output during synchronous tap control.
(Note 2) While the "Spindle servo-ON" signal is ON, all input signals for "Spindle forward run start
(SRN)", "Spindle reverse run start (SRI)", and "Spindle orient command (ORC)" are
ignored.
(Note 3) This signal is valid only for the system that is high-speed serially connected with the
spindle controller.
6. EXPLANATION OF INTERFACE SIGNALS
6.1 PLC Input Signals (Bit Type: X***)
Signal
abbreviation
SSA
6-1-68
1st spindle 2nd spindle
X999 X9C9
3rd spindle
X9F9