Mitsubishi FREQROL-SFJ, Руководство по обслуживанию

Страница: 102 / 125

Cause
Trouble with motor
in encoder
Trouble with posi-
tion control loop
function
between motor and CON2 is
disconnected.
Observe the signal from
CH31 and 32 (common CH) of
using an oscillo-
scope.
When motor runs at
the signal should be sinu-
soidal-wave signal at the
following frequency:
1500
x 128 =
60
This alarm occurs due to Set parameter
out of control in sync. TAP, (orienta-
sync. control, or other po- tion of position
sition control loop opera- detector) proper-
tion.
ly*
Gear ratio parameter
GRA4, GRB4, is not
set properly (parameter set-
ting is smaller than 100).
Set gear ratio
parameter proper-
ly (refer to
"Parameter Table").
Remedy
Replace the motor
built-in encoder.
OVER VOLRRAGE
This alarm voltage across capacitor
is excessive (due to excessively large regenerative energy).
Cause
Wrong wiring
Checkup Remedy
resistor unit is Connect discharge
connected to FR-SFJ. resistor unit.
Motor constant
MSL setting
Set
1
meter set improperly'does not meet motor in use.
Trouble with
Resistance measured across
Replace the
and R2 of discharge
charge resistor
unit
tor unit is improper, or zero unit.