Inovance SV820N Series - Page 114

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5 Troubleshooting
5
■ E3.939: Motor power cable breaking
Cause:
The actual phase current of the motor is smaller than 10% of the rated motor current, and the actual motor
speed is small but the internal torque reference is very large.
Probable Cause ConrmingMethod Corrective Action
The motor power
cablesbreak.
Checkwhetherthedifferencebetween200B-19h(phasecurrent
effective value) and 200B-03h (internal torque reference) reaches
over 500%, and whether 200B-01h (actual motor speed) is smaller
than 1/4 of the rated motor speed.
Reconnect the motor
power cables. Use new
cables if necessary.
■ E3.941:Parametermodicationtakingeffectonlyafterpoweringonagain
Cause:
Afterthefunctioncodeproperty"effectivetime"as"power-onagain"ismodied,theservodrivepromptsthe
user to power on again.
Probable Cause ConrmingMethod Corrective Action
Function codes with changes
immediately in effective are
modied.afterpoweringonagain
checkwhetherfunctioncodeswith"effectivetime"
as"power-onagain"aremodied.
Power on the servo drive
again.
■ E3.942: Parameter storage too frequent
Cause:
Thenumberoffunctioncodesthataremodiedonceexceeds200.
Probable Cause ConrmingMethod Corrective Action
A great number of function code
parametersaremodiedand
stored frequently to EEPROM
(200C-0Eh=1)
Checkwhetherthehostcontrollerperforms
frequent and fast function code parameter
modicationontheservodrive.
Checktherunningmode.For
parameters that need not be
stored in EEPROM, set 200C-0 Eh
to 0 before the writing operation of
the host controller.
■ E3.950: Positive limit switch warning
Cause:
ThelogicoftheDIallocatedwithFunIN.14:P-OT(positivelimitswitch)isvalid.
Probable Cause ConrmingMethod Corrective Action
The logic of the DI
allocatedwithFunIN.14:
P-OT (positive limit switch
inhibited) is valid.
CheckwhetheraDIisallocatedwith
FunIN.14 (P-OT) in group 2003h.
View whether the DI logic is valid in
200B-04h (monitored DI states).
Checktherunningmode.Ontheprerequisite
of ensuring safety, send a reverse reference
orrotatethemotortomakethelogicofDI
with the positive limit switch function become
invalid.
■ E3.952: Negative limit switch warning
Cause:
ThelogicoftheDIallocatedwithFunIN.15:N-OT(negativelimitswitch)isvalid.
Probable Cause ConrmingMethod Corrective Action
The logic of the DI
allocatedwithFunIN.15:
N-OT (negative limit
switch inhibited) is valid.
CheckwhetheraDIisallocatedwith
FunIN.15 (N-OT) in group 2003h.
View whether the DI logic is valid in
200B-04h (monitored DI states).
Checktherunningmode.Ontheprerequisite
of ensuring safety, send a reverse reference
orrotatethemotortomakethelogicofDI
with the negative limit switch function become
invalid.