Mitsubishi MELSEC-A series - Page 151

8. TROUBLESHOOTING ,..~ ,, . .. . /MELSEC=A
(2) System zero has moved
Check distance the zero point has moved.
YES
Ensure that the zeroing dcg is witched off while
c
the zero phase signal is on.
(Refer to Section 3.5.2.)
m
Ensure that the zero is close enough to
the zeroing dog.
c
Check for con- bounce etc. in zeroing dog.
4
e
Zeroing dog or wiring faulty.
w Check for zeroing dog signal.
NO
c
Replace zeroing dog.
r- Check motor drive unit.
8-1 5
IB IW ffi101-A