
B-65325EN/01 START-UP PROCEDURE FOR βi SVPM 4.CONFIRMATION OF THE OPERATION
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4.4.2 VRDY-OFF Alarm Indicated on the CNC Screen
When the VRDY-OFF alarm is indicated on the CNC, check the items
listed below. In addition, VRDY-OFF can occur also for reasons other
than listed below. If the following items turn out to have not caused
VRDY-OFF, check diagnosis information No. 358 (V ready-off
information) on the diagnosis screen and report it to FANUC.
(1) Emergency stop signal (ESP)
Has the emergency stop signal (connector: CX4) applied to the
SVPM been released? Alternatively, is the signal connected
correctly?
(2) MCON signal
Hasn't setting up the axis detach function disabled the
transmission of the ready command signal MCON from the CNC
to the SVPM?
(3) SVPM control printed-circuit board
The SVPM control printed-circuit board may be poorly installed
or faulty. Be sure to push the faceplate as far as it will go. If the
problem persist, replace the control printed-circuit board.
Checking diagnosis information (DGN) No. 358 makes it possible to
analyze the cause of the VRDY-OFF alarm.
(Supported servo software: Series 90B0/D(04) and subsequent
editions)
All NCs do not support this function.
Diagnosis
358 V ready-off information
Convert the displayed value to binary form, and check bits 5 to 14 of
the resulting binary number.
When the servo amplifier starts working, these bits become 1
sequentially, starting at bit 5. When the servo amplifier has started
normally, all of bits 5 to 14 become 1.
Check bits 5 to 14 sequentially, starting at the lowest-order bit. The
first lowest bit that is not 0 corresponds to the processing that caused
the V ready-off alarm.
#15 #14 #13 #12 #11 #10 #9 #8
SRDY DRDY INTL RLY CRDY MCOFF MCONA
#7 #6 #5 #4 #3 #2 #1 #0
MCONS *ESP HRDY
#06(*ESP) : Emergency stop signal
#07,#08,#09 : MCON signal (CNC → amplifier → converter)
#10(CRDY) : Converter preparation completed signal
#11(RLY) : Relay signal (DB relay energized)
#12(INTL) : Interlock signal (DB relay de-energized)
#13(DRDY) : Amplifier preparation completed signal