
B-65280EN/05 FANUC AC SPINDLE MOTOR αi series 5.FUNCTION DESCRIPTIONS
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(4) Because the motor is switched off during speed range switching,
select an output characteristic, whichever is necessary, before
entering any of the following control modes. Do not change the
speed range switching request signal during operation.
• Rigid tapping
• Cs contouring control
• Spindle synchronous control
• Spindle positioning
• Spindle orientation (lower than or equal to the orientation
speed)
(b) Low-speed characteristic magnetic contactor status signal (RCHA)
(1) Input an open/closed status signal for the magnetic contactor
(MCC) used for the low-speed characteristic of the spindle
motor.
0: The low-speed characteristic magnetic contactor is open
(off).
1: The low-speed characteristic magnetic contactor is closed
(on).
(2) Usually, specify the status of the auxiliary contact (contact A) of
the low-speed characteristic magnetic contactor without
modifying it.
(3) If bit 3 of parameter No. 4014 = 0, the RCHA signal is used as a
confirmation signal for the status of the power line. So, specify
the selected status of the magnetic contactor for switching the
output characteristic of the spindle motor.
0: The high-speed characteristic is selected.
1: The low-speed characteristic is selected.
To switch from low-speed characteristic to high-speed
characteristic, after making sure that the low-speed characteristic
magnetic contactor is switched off and the high-speed
characteristic magnetic contactor is switched on, change this
signal from 1 to 0. Similarly, to switch from high-speed
characteristic to low-speed characteristic, after making sure that
the high-speed characteristic magnetic contactor is switched off
and the low-speed characteristic magnetic contactor is switched
on, change this signal from 0 to 1.
(c) High-speed characteristic magnetic contactor status signal (RCHHGA)
(1) Input an open/closed status signal for the magnetic contactor
(MCC) used for the high-speed characteristic of the spindle
motor.
0: The high-speed characteristic magnetic contactor is open
(off).
1: The high-speed characteristic magnetic contactor is closed
(on).
(2) Usually, specify the status of the auxiliary contact (contact A) of
the high-speed characteristic magnetic contactor without
modifying it.
(3) The RCHHGA signal is valid if bit 3 of parameter No. 4014 = 1.