
5.FUNCTION DESCRIPTIONS FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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(c) Main spindle motor magnetic contactor status signal (MFNHGA)
(1) Input the open/closed status of the main spindle motor magnetic
contactor (MCC).
0: The main spindle motor magnetic contactor is open (off).
1: The main spindle motor magnetic contactor is closed (on).
(2) Usually, specify the status of the auxiliary contact (contact A) of
the main spindle motor magnetic contactor without modifying it.
(3) The MFNHGA signal is valid if bit 2 of parameter No. 4014 = 1.
(3) Address list of output signals (CNC → PMC)
15i 16i 30i
#7 #6 #5 #4 #3 #2 #1 #0
1st- F229 F045 F045
SSTA
2nd- F245 F049 F049
SSTB
1st- F228 F046 F046
CFINA CHPA
2nd- F244 F050 F050
CFINB CHPB
(4) Details of output signals (CNC → PMC)
(a) Power line switching signal (CHPA)
(1) The CHPA signal is a command signal for selecting a magnetic
contactor used to switch the power line of the spindle motor.
0: The main spindle motor magnetic contactor is selected.
1: The sub-spindle motor magnetic contactor is selected.
(2) When the spindle switching request signal (SPSLA) is input, a
check is made to see if the motors are at a stop and their power is
off. Once it has been confirmed that the motors are at a stop and
their power is off, the CHPA signal is output. Switch the
magnetic contactor according to the CHPA signal.
(3) When switching from the sub-motor to the main motor occurs,
the CHPA signal changes from 1 to 0 in response to an incoming
spindle switching request signal (SPSLA) provided that the
sub-motor is at a stop and its power is off. After this signal
change has occurred, first switch off the sub-motor magnetic
contactor. After making sure that the sub-motor magnetic
contactor has been switched off, switch on the main motor
magnetic contactor.
(4) When switching from the main motor to the sub-motor occurs,
the CHPA signal changes from 0 to 1 in response to an incoming
spindle switching request signal (SPSLA) provided that the main
motor is at a stop and its power is off. After this signal change
has occurred, first switch off the main motor magnetic contactor.
After making sure that the main motor magnetic contactor has
been switched off, switch on the sub-motor magnetic contactor.