
B-65280EN/05 FANUC AC SPINDLE MOTOR αi series 5.FUNCTION DESCRIPTIONS
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(b) Spindle switching completion signal (CFINA)
(1) After spindle switching is completed, it is indicated which
spindle motor is currently under control.
0: The main spindle motor is currently under control.
1: The sub-spindle motor is currently under control.
(2) After making sure that the spindle switching request signal
(SPSLA) has changed and the CFINA signal matches the SPSLA,
go to the next operation.
(3) Keep the rotation commands (SFRA and SRVA) and spindle
orientation command (ORCMA) turned off during switching,
because switching requires that the motor power be off.
(c) Zero-speed signal (SSTA)
(1) It is indicated whether the spindle motor speed is not lower or not
higher than the zero-speed detection level (parameter-specified
speed level).
0: The motor is rotating at or faster than the speed detection
level.
1: The motor is rotating at or slower than the speed detection
level.
(2) The motor must be at a halt during spindle switching. Use the
SSTA signal to check that that the motor is at a halt.