Mitsubishi FREQROL-SFJ - Page 90

"READY" signal and
"speed reference" signal have
been input.
Trouble II
Checkup
Remedy
Control equip-
(1) Check if fuse was
(1) Replace blown out
ment comes into
blown out or main
fuse.
If fuse is
a standstill
circuit no-fuse break-
blown out again,
abruptly
er was tripped.
proceed to "Step
rn).
(2) Check the input power
(2) Input correct power
suPPlY*
supply.
AC200V':$, 5OHz
Provide power sup-
AC200 - 23OV_l5%,
+lO%
ply with sufficient
60Hz
margin in capacity.
(3) "Alarm"
is displayed. Refer to 7.4.
(4) Are signals from NC
and-programmable con-
troller proper?
Check the input sig-
nals (machine "READY",
"FWD run", "REV run",
etc.), using "diagno-
sis"
function (read-
out).
(5) In open-loop control
(5) If operation be-
mode,
comes possible,
0 set control paramet-
it is likely that
ter to 00 0001 ,
speed feedback
ADD
DATA
system is in fail-
0 input
"speed refer-
ure.....
replace
ence"
signal and
the encoder.
"start"
command to
try operation.
If operation is
impossible, it is
I
(Control mode returns 1
likely that the
I
to closed-loop mode, I
0
I
main circuit is in
when
*p' button is 1
failure ("alarm"
pressed,
or the power!
lamp will light).
is turned off after ,
parameter setting.)
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