(7) BRAKING CIRCUIT FAULT
This alarm occurs if the braking circuit does not func-
tion properly.'
*
?
Cause
Checkup
Remedy
*
Trouble with card
Replace the card SFJ-CA1
Replace the card
SFJ-CA1
with a new one to check.
SFJ-CAL.
I
Trouble with con- 'If the same alarm occurs
Replace the con-
trol
unit.
1
again with a new card
SFJ-
1
trol unit.
;
CA1,
the control unit is
.
j
likely to be defective.
I
I
-
(8) OVER SPEED
This alarm appears if motor speed exceeds 115% of the
rated speed.
Cause
I
Checkup
r
1
Parameter setting
/
The motor maximum speed
set-
improper
iting
is under
1000rpm.
Remedy
,
Speed detection
Observe the signal from CH31
:
signal distorted
:
and 32 (common CH23) of
SFJ-
by noise
CA1,
using an oscilloscope,
/
.to
check for signal.
Check if shielding of cable
'between motor and CON2 is
If the setting is
too low,
speed de-
tection range is
narrow (15%) and
therefore this
alarm is likely to
occur.
Increase setting
of maximum speed
parameter
ITSPI
(#31).
Use a continuous
cable to assure
continuous shield-
ing.
-
98
-
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