If The Servomotor Fails To Start; Shutdown - Fuji Electric ALPHA7 User Manual

After checking shaft rotation in the test operation mode, press the [MODE/ESC] key to return until
Fn_01
[ ] is displayed again.
Fn_01
Unless [ ] is displayed again, rotation with the sequence I/O signal is impossible.
Notation of key
In this chapter, keys on the keypad may be simply specified as shown below.

[MODE/ESC] key
In the case of [MODE] function: MODE
In the case of [ESC] function: ESC

[SET/SHIFT] key
In the case of [SET] function: SET (1 sec. or above)
In the case of [SHIFT] function: SHIFT
3.2.5

If the Servomotor Fails to Start

If the servomotor fails to start or unexpected indication is given, it is recommended to undergo the
procedure described in "13.5.8 Diagnosis to be Made If the Servomotor Fails to Start", using PC
Loader.
3.2.6

Shutdown

If the power is turned off with the servo-on signal turned on, the servo amplifier detects a low voltage
alarm.
 If the motor power supply is turned OFF for longer than the PA2_68: Main power shutoff detection
time with the servo-on signal ON and then turned ON again, a main circuit power supply low voltage
alarm (LVP) is detected.
 If the motor power supply is turned ON again after at least 1 second longer than the PA2_68: Main
power shutoff detection time has elapsed with the servo-on signal ON, main circuit power supply low
voltage is not detected.
 If the DC link voltage drops below about 200V and the power is restored within one second with the
servo-on signal being turned on, the main power undervoltage is detected. If the duration exceeds
one second, the main power undervoltage is not detected.
Even if the main power undervoltage alarm is detected, there is no effect on the servo amplifier.
However, do not repeat to turn the power on or off to start or stop the servomotor.
Repetitive power-on and shutdown will cause breakage to the servo amplifier.
If the operation command is turned OFF before the power supply is turned OFF, the main circuit power
supply low voltage alarm is not detected.
The alarm reset signal resets alarm detection (activation of a protective function of the servo amplifier).
If the power is shut off during operation, the servo amplifier turns off the ready for servo-on [RDY]
signal to stop the internal CPU.
CHAPTER 3 OPERATION
Operation Check
3
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