EUCHNER LCA 4, Operating Instructions Manual

Page: 60 / 96

Operating Instructions
Light Grids/ Light Curtains LCA 4
60
(translation of the original operating instructions) 2504709-01-06/17
6.4. LED displays
The system states of the transmitter and receiver are shown in the following figures.
STOP
OK
SIGNAL
LOW
START
STOP
OK
START
?
ERROR
OK
TEST
Transmitter Receiver Receiver
(for 14 mm resolution / increased range)
NOTICE
The related device system state is indicated by the LED displays.
To rectify erroneous system states, see chapter Diagnostics / troubleshooting.
LED displays TRANSMITTER
Figure System state LED indicator Description
OK
Normal operation
Power Up
Green The transmitter is in normal operation.
The green LED is illuminated continuously.
The green LED briefly illuminates twice during the power-up process

Power up with selection: high range.
?
ERROR
Fault Red flashing
FO1A and FO1B are inactive.
The red LED is flashing.

The device monitored is not allowed to be operated.
Power Up Red The red LED illuminates during the power-up process. (2 s)
TEST
Test function Orange
The transmitter test function is active.
The LED illuminates orange.
LED displays RECEIVER
Figure System state LED indicator Description
OK
Normal operation Green
The receiver is in normal operation.
FO1A and FO1B are active.
The green LED is illuminated continuously.

The device monitored can be operated.
STOP
Stop Red
At least one beam has been interrupted.
FO1A and FO1B are inactive.
The red LED illuminates continuously.

The device monitored is not allowed to be operated.
Fault Red flashing
FO1A and FO1B are inactive. (Device error)
The red LED is flashing.

The device monitored is not allowed to be operated.
START
Start / restart Yellow
Manual start /restart mode
FO1A and FO1B are inactive.
The yellow LED illuminates.
 The device monitored is only allowed to be operated again once the
detection area has been cleared of all objects and the start button has
been pressed and released again.
SIGNAL
LOW
Weak signal Blue
Weak signal strength
The blue LED illuminates.
The following can cause a weak signal:
 Incorrect alignment of transmitter and receiver.

Dirt on the optical surface

Interference such as mist, rain, smoke or dust