Pinnacle Systems SLT Series - Manual (Page 23)

16
SLT Series
Diagnostics and Troubleshooting
Status:
RED light, fail safe relays open.
Reason(s):
a) information on switch positions
differ.
b) values of special registers differ.
Cure(s):
Check ground connections. The unit
must be serviced by authorized
personnel.
C ...................... External infrared source detected at
startup
Definition:
Infrared signals detected when the right
side Emitter Pylon was not signaled to
transmit.
Status:
RED light, fail safe relays open.
Reason(s):
External pulse of infrared light from a
strobe or another light curtain was
detected during self-testing.
Cure(s):
Turn off all other light curt ains in the
entire area and try the curtain again. It
is probably another nearby light curtain
emitter throwing this light curtain out of
sync. You may need to reverse their
position by exchanging the Receiver
and Emitter pylon with each other so it
fires its beams in the other direction.
D ...................... Internal Short/Open
Definition:
Between each scan the Master looks
at the output of each receiver circuit in
turn. Should an improper signal level
occur, this code is displayed.
Status:
RED light, fail safe, relays open.
Reason(s):
a) Problem in any one of the cable
connections inside the Receiver
Pylon.
b) Short in one of the phototransistors.
c) Open in one of the comparators.
d) External infrared source of long
duration.
e) Beam in transmitter pylon left on.
Cure(s):
Check all cables inside the Receiver
Pylon for bent pins or cold solder joints.
E ...................... Beam and/or board select line failure
Definition:
The Master has linked up with the slave
properly, but the Slave sees dif ferent
data then the Master.
Status:
RED light, fail safe relays open.
Reason(s):
a) Board select chip bad.
b) Beam select chip bad.
c) Master has problem with data port
select lines.
d) Slave has problem with reading
select lines.
e) Short or open on PCB.
Cure(s):
Check ground connections. The unit
must be serviced by authorized
personnel.
F ...................... Clock/Code Failure
Definition:
The onboard watchdog timer sensed a
clock malfunction or a failure in the
execution of the code. Upon initial
power up, the Diagnostic Display should
count backwards from ‘.F .’ to ‘.0.’ to
indicate that its clock is running. If you
do not see this happening when
powering up, the clock or computer chip
is bad. If you see it happen and then
get this code, a glitch has caused a
software code failure.
Status:
RED light, fail safe relays open.
Reason(s):
a) Voltage levels too low for operation.
b) Crystal bad.
c) Power surge caused code to
executed improperly.
d) Reset circuit glitch.
e) Computer bad.
Cure(s):
Check for low line voltage. If the line
voltage drops below 105VAC (even for
just a second) the guard could lock up
and display this code.
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