
APPENDIX
B. ALARM LIST
B–62835EN/01
380
Alarm
No.
RemedyDescriptionMeaning
AL–34 Parameter data setting beyond
allowable range of values
Detects parameter data set beyond allowable range
of values.
Set correct data.
AL–35 Excessive gear ratio data set-
ting
Detects gear ratio data set beyond allowable range
of values.
Set correct data.
AL–36 Error counter overflow Detects error counter overflow. Correct cause, then reset
alarm.
AL–37 Speed detector parameter set-
ting error
Detects incorrect setting of parameter for number of
speed detection pulses.
Set correct data.
AL–39 Alarm for indicating failure in
detecting 1–rotation signal for
Cs contouring control
Detects 1–rotaion signal detection failure in Cs con-
touring contorl.
Make 1–rotaion signal ad-
justment.
Check cable shield status.
AL–40 Alarm for indicating 1–rotation
signal for Cs contouring con-
trol not detected
Detects that 1–rotation signal has not occurred in Cs
contouring control.
Make 1–rotaion signal ad-
justment.
AL–41 Alarm for indicating failure in
detecting position coder 1–ro-
taion signal.
Detects failure in detecting position coder 1–rotation
signal.
Make signal adjustment for
signal conversion circuit.
Check cable shield status.
AL–42 Alarm for indicating position
coder 1–rotation signal not de-
tected
Detects that position coder 1–rotation signal has not
issued.
Make 1–rotation signal ad-
justment for signal conver-
sion circuit.
AL–43 Alarm for indicating discon-
nection of position coder signal
for differential speed mode
Detects that main spindle position coder signal used
for differential speed mode is not connected yet (or
is disconnected).
Check that main spindle
position coder signal is
connected to connector
CN12.
AL–46 Alarm for indicating failure in
detecting position coder
1–rotation signal in thread cut-
ting operation.
Detects failure in detecting position coder 1–rotation
signasl in thread cutting operation.
Make 1–rotation signal ad-
justment for signal conver-
sion circuit.
Check cable shield status.
AL–47 Position coder signal ab-
normality
Detects incorrect position coder signal count opera-
tion.
Make signal adjustment for
signal conversion circuit.
Check cable shield status.
AL–49 The converted differential
speed is too high.
Detects that speed of other spindle converted to
speed of local spindle has exceeded allowable limit
in differential mode.
Calculate differential
speed by multiplying speed
of other spindle by gear ra-
tio. Check if calculated val-
ue is not greater than maxi-
mum speed of motor.
AL–50 Excessive speed command
calculation value in spindle
synchronization control
Detects that speed command calculation value ex-
ceeded allowable range in spindle synchronization
control.
Calculate motor speed by
multiplying specified
spindle speed by gear ra-
tio. Check if calculated val-
ue is not greater than maxi-
mum speed of motor.
AL–51 Undervoltage at DC link sec-
tion
Detects that DC power supply voltage of power cir-
cuit has dropped (due to momentary power failure or
loose contact of magnetic contactor).
Remove cause, then reset
alarm.
AL–52 ITP signal abnormality I Detects abnormality in synchronization signal (ITP
signal ) used in software.
Replace servo amp. PCB.
AL–53 ITP signal abnormality II Detects abnormality in synchronization signal (ITP
signal) used in hardware.
Replace servo amp. PCB.
AL–54 Overload current alarm Detects that excessive current flowed in motor for
long time.
Remove overload of motor
and reset the alarm.
AL–55 Power line abnormality in
spindle switching/output
switching
Detects that switch request signal does not match
power line status check signal.
Check if power line status,
check signal is processed
normally.