LP21/LP22
Pag.
18
a
37
LP21/LP22 Installation instructions en
Sensors
8
Description of functions
In the following section the indicator and control elements are described.
NOTE
Information in this document
This document refers to the default settings or default values defined by the manufacturer. The factory
settings
of customer variants may differ from the manufacturer’s specifications. Please observe the
instructions on the device, as well as the documents supplied with it.
8.1
LED status indicators
The LEDs (light emitting diodes) on the front side indicate the state of the loops and the detector.
There are two LEDs for each loop channel:
• The red LED indicates the coverage status of the respective loop
• The blue LED indicates the operating status of the detector
Red LED
Blue LED
Description of status
No power supply, detector inactive
Detector ready, loop connected, no object detected
Detector ready, loop connected, object detected
No loop connected, loop break, loop closure
1 Hz
Ready for operation following earlier, now rectified, loop error
5 Hz
Frequency alignment is running
After frequency adjustment, both LEDs simultaneously display the set loop
frequency in a flash code (see
Flash code
illustrated example)
Tab.6: LED signal colours
Key to LED symbols
Lit up
Off
Flashing
Frequency
LED flash code following a frequency alignment
Fig.8: LED display of loop frequency
