16 - 108
16. INDEXER POSITIONING OPERATION Display Name Definition Cause Action
(Note)
888
Watchdog CPU, parts faulty. Fault of parts in servo amplifier.
Checking method
Alarm (888) occurs if power is
switched on after disconnection of
all cables but the control circuit
power supply cable.
Change the servo amplifier.
Note. At power-on, "888" appears instantaneously, but it is not an error.
(3) Remedies for warnings
CAUTION If an absolute position counter warning (AE3) occurr ed, always make home
position setting again. Not doing so may caus e unexpected operation.
POINT
When any of the following alarms has occurred, do not resume operation b y
switching power of the servo amplifier OFF/ON repeatedly. The ser vo
amplifier and servo motor may become faulty. If the power of the servo
amplifier is switched OFF/ON during the alarms, allow more than 30 m inutes
for cooling before resuming operation.
Excessive regenerative warning (AE0)
Overload warning 1 (AE1)
Always execute a home position return when the forward rotation stroke end
(LSP) or the reverse rotation stroke end (LSN) turns off.