CBOX936
INSTALLATION AND PROGRAMMING MANUAL
25
TABLE 13-1: PHOTO EYE LED STATUS AND TROUBLESHOOTING
LED
STATUS
MEANING
ACTION
Always off
(TX, RX) – The photocell has no
power supply or is faulty.
Check that on the terminals of the photocell there is a
voltage of approximately 8 to 12 V DC. If the voltage
is correct, it is likely that the photocell is faulty.
3 quick
flashes,
(pause)
(TX, RX) – The pair of photocells has
not been memorized in the control
unit (or the interface).
Make sure that each pair of photocells has a different
jumper configuration than the others. Perform the
device learning procedure (INSTRUCTION 12).
Very slow
flashing
(TX, RX) – The TX is transmitting
properly. The RX is receiving an
optimum signal.
None; optimum TX - RX alignment.
Slow flashing
(RX) – The RX is receiving a good
signal.
None; good operation.
Fast flashing
(RX) – The RX is receiving a weak
signal.
Fair operation; the photocell glass should be cleaned
or re-aligned.
Very fast
flashing
(RX) – The RX is receiving a poor
signal.
Barely operational; clean the photocell glass and
realign the TX and RX photocells.
Always on
(TX, RX) –The RX is receiving no
signal.
Check if there is an obstacle between the TX and the
RX; clean the photocell glass and realign the TX and
RX photocells.
Once photo eyes are recognized by the control board, the photo eye LED behavior should be checked and
adjustments made as follows:
1.
After power up and all BlueBUS devices are recognized, observe LED behavior in each photo eye.
2.
SLOWLY flashing LEDs indicate photo eyes are operating properly.
3. If LEDs indicate improper detection by the control board, poor transmission, or no signal, refer to TABLE 13-
1. Continue to next section for instructions for adjustment of photo eye transmitter and receiver alignment.
13
BLUEBUS PHOTO EYE STATUS & TROUBLESHOOTING
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