75
●
Set point signal is not given.
[SET*] lamp on front panel is lit.
Check continuity between output contacts using a
circuit tester, with external devices disconnected.
If the contact is not in continuity though
actuated, the relay has failed.
Contact ULVAC for inspection and repair.
The minimum operating current of the relay
used for output is 10 mA. At a current below
this value, relay may not be in continuity
electrically though mechanically actuated.
Signal drops momentarily because
the emission current of the sensor
head can hardly be obtained
normally.
If the emission current is momentarily NG, the
set point will also be turned OFF
simultaneously. Replace the sensor head with
Erroneous wiring or broken wire of
the EXT-I/O connector.
Correct the wiring and check continuity using a
circuit tester. (See page 12.)
●
Control operation from I/O connector cannot be performed.
Erroneous wiring or broken wire of
the EXT-I/O connector.
Correct the wiring and check continuity using a
circuit tester. (See page 12.)
Erroneous operating procedure
Perform operation in the REMOTE status.
(See page 64.)
Photocoupler current is too low or
cannot be flown.
The circuit does not feed 10mA current to the
photocoupler.
When an external power supply is used, make
sure the current capacity is sufficient and check if
resistance is too high by wiring. If
signal is turned ON/OFF using
a relay, make sure
the minimum operating current of the relay is not
more than 10 mA.
Contact ULVAC for inspection and repair.
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