APPENDIXA. ALARM LIST
B–63835EN/03
558
The details of servo alarm are displayed in the diagnosis display (No. 200
and No.204) as shown below.
#7
OVL200
#6
LV
#5
OVC
#4
HCA
#3
HVA
#2
DCA
#1
FBA
#0
OFA
#7 (OVL) : An overload alarm is being generated.
(The details are indicated in diagnostic data No.201).
#6 (LV) : A low voltage alarm is being generated in servo amp.
Check LED.
#5 (OVC) : A overcurrent alarm is being generated inside of digital servo.
#4 (HCA) : An abnormal current alarm is being generated in servo amp.
Check LED.
#3 (HVA) : An overvoltage alarm is being generated in servo amp.
Check LED.
#2 (DCA) : A regenerative discharge circuit alarm is being generated in servo amp.
Check LED.
#1 (FBA) : A disconnection alarm is being generated.
(The details are indicated in diagnostic data No. 201)
#0 (OFA) : An overflow alarm is being generated inside of digital servo.
#7
ALD201
#6 #5 #4
EXP
#3 #2 #1 #0
When OVL equal 1 in diagnostic data No.200 (servo alarm No. 400 is
being generated):
#7 (ALD) 0 : Motor overheating
1 : Amplifier overheating
When FBAL equal 1 in diagnostic data No.200 (servo alarm No. 416 is
being generated):
ALD EXP Alarm details
1 0 Built–in pulse coder disconnection (hardware)
1 1 Separately installed pulse coder disconnection
(hardware)
0 0 Pulse coder is not connected due to software.
#7
204
#6
OFS
#5
MCC
#4
LDA
#3
PMS
#2 #1 #0
#6 (OFS) : A current conversion error has occured in the digital servo.
#5 (MCC) : A magnetic contactor contact in the servo amplifier has welded.
#4 (LDA) : The LED indicates that serial pulse coder C is defective
#3 (PMS) : A feedback pulse error has occured because the feedback cable is
defective.
D Details of servo alarm