Mitsubishi FREQROL-SFJ - Page 115

Cause
Checkup
Remedy
"Speed detection" Signal on CH31 and 32 (CH23
Shield the cable
signal distorted
for common) of card SFJ-CA1
between CON2 and
by noise
is distorted by noise.
motor built-in
encoder (without
discontinuity).
Use a cable of
larger size for mo-
tor.
S-analog speed
Signal on CH30 (CH23 for com-
Shield the signal
reference signal
man) of card SFJ-CA1 is dis-
line properly.
distorted by
torted by noise.
noise.
Trouble with
Signals on CH31 and 32(CH23
Replace the motor
motor built-in
for common) of card SFJ-CA1
built-in encoder.
encoder
do not offset accurately.
’
Normal waveform
,+z&,JJ fl.5”
Peak voltage of signal is not
within t1.5V.
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