- 22-
wiring. Confirm the wiring is correct before the power-on commissioning.
Ø
Beam focusing
Adjust the position of emitter and receiver to make them parallel and aligned until the red
indicator on the receiver is off, the green indicator is on and the shunting indicator is off. No red and
green lights are allowed to jump repeatedly to the critical state of light.
Ø
Inspection
When shading one beam, the corresponding shunting indicator will be on. The red indicator on
the receiver is on and the green indicator is off. After removing the shade, the red indicator will be
off, the green indicator will be on and the shunting indicator will be off. The above state indicates
the safety light curtain is normal.
Ø
Trial operation
After the completion of commissioning work and before the formal working, the trial operation
should be conducted with the controlled equipment. When it is confirmed that the safety light
curtain is shaded, the state of control equipment should be consistent with the forecast to ensure the
accuracy.
Part 4
Maintenance
Before the formal working, check the working state of light curtain. The work may be conducted
when normal. The abnormal conditions should be reported to the professionals. The check and
maintenance of safety light curtain are very important to the operation on site. We should formulate
the safety regulations to standardize the use, inspection and maintenance of light curtain. The fault
and overhaul of emitter and receiver are shown in the following table.
Fault phenomenon
Failure causes
Solutions
All indicators of emitter or
receiver are not on
Power supply fault
Check external power supply
Fault of transmission cable
Maintain transmission cables
and connectors
Emitter or receiver is damaged
Replace emitter or receiver
The
red
indicator
of
receiver is on and the green
indicator is off
The beam focusing is not good
Focus the beam
The surface of filter plate of emitter
or receiver is dirty
Wipe with clean and softy
cotton yarn
Fault of emitter or receiver
Replace emitter or receiver
Yellow indicator of receiver
is on
Fault of receiver
Replace receiver
