Table of Contents
Advertisement
PROTOCOL DATA AND FAULT INDICATION
Input/Output bits
The refl ective beam detector responds to output
bits from the protocol as follows:
When output bit 2 is set to logic 1 on two or
more consecutive pollings the red alarm
LED is illuminated.
When output bit 1 is set to logic 1 on two
or more consecutive pollings the beam
detector carries out a self-test. If the test
is successful, an analogue value of 64 is
transmitted to the control panel. If a value
less than 54 is transmitted, the self test has
failed and the beam detector should be
inspected (see Troubleshooting on page
20).
Output bit 0 is not used.
Input bits 2, 1 and 0 refl ect the status of the
corresponding output bit.
Type Code
The type code of the refl ective beam detector is
101 01 (bits 210 43).
LED fault indication
A fault is indicated by the amber LED fl ashing
once per second.
If the drift compensation function has reached
its limit the amber LED fl ashes once every 2 sec-
onds. The detector will continue to function but
maintenance procedures should be carried out
at the earliest opportunity.
19
Hide quick links:
Advertisement
Table of Contents
