G. ALARM LIST
AL–53 ITP signal abnormality II Detects abnormality in synchronization signal (ITP
signal) with CNC (such as loss of ITP signal).
Remove cause, then reset
AL–54 Overload current alarm Detects that excessive current flowed in motor for
Check if overload opera-
tion or frequent accelera-
tion/deceleration is per-
AL–55 Power line abnormality in
Detects that switch request signal does not match
power line status check signal.
Check operation of mag-
netic contractor for power
Check if power line status
check signal is processed