Pinnacle Systems SLT Series - Manual (Page 22)

15
SLT Series
Diagnostics and Troubleshooting
c) Slave has legally overridden the
Master because it believed the
current conditions require the
relays to be off.
d) Line voltage levels too low to
activate either relay.
Cure(s):
Only reason a) can be checked by user,
all other reasons can only be checked
by authorized trained personnel.
7 ...................... Auto Blank Activated
Definition:
The Auto Blank keyswitch was moved
from the OFF/RESET position into an
Auto Blank position and an object
covering a total of less then nine beams
was found. Before Code 7 is displayed,
the display will show the exact number
of blocked beams for about two
seconds (see Auto Blank section under
Optional Features, Page 5).
Status:
GREEN light on, relays closed.
Reason(s):
An obstruction was placed in the field
of view of the light curtain and was
subsequently programmed into the
computer via the keyswitch.
Cure(s):
To deactivate the Auto Blank, turn the
keyswitch back into the OFF/RESET
position or power down the light curtain
to clear the memory.
8 ...................... Auto Blank Obstruction Missing
Definition:
After Auto Blank was activated, the
obstruction was moved from its initial
position in the guarded area or the
obstruction was too big.
Status:
GREEN in Auto Fixed Blank mode
RED in the other two Auto Blank modes
(see Auto Blank section under Optional
Features, Page 5).
Reason(s):
a) The user activated the Auto Blank
and subsequently moved the
obstruction from its programmed
position.
b) The total obstruction size exceeded
eight beams.
Cure(s):
a) Re-adjust the obstruction position
and stabilize its movement.
b) Make sure the total size does not
exceed eight beams.
9 ...................... Internal Ram Fault
Definition:
When the light curtain self-tests, it
exercises all of its internal ram locations
to make sure that they all store data
properly. Upon testing, one or more
memory locations failed this test.
Status:
RED light, fail safe relays open.
Reason(s):
a) Reset circuitry failed to respond to
a glitch in the power supply line.
b) Bad ram.
c) Bad ground.
Cure(s):
Check grounds, power down the light
curtain for one minute and try again. If
this does not work, the unit must be
serviced by authorized personnel.
A ...................... Master cannot talk to slave computer
Definition:
The Master waits for the Slave to
communicate between each scan of the
light curtain and will time-out if it can’t
complete its communication.
Status:
RED light, fail safe relays open.
Reason(s):
a) Faulty microprocessor chip(s).
b) Noise on power line causes one of
the two microprocessors to reset
and fall out of sync with the other.
c) Intermittent drop in line voltage.
Cure(s):
If the problem is intermittent, then it is
noise. Tap power for the Receiver Pylon
head of all other devices that cause
noise (i.e., solenoids, motors) so that it
gets cleaner power. Also, monitor line
voltage for any intermittent drops.
B ...................... Data disagreement with the slave
unit
Definition:
The Master has linked up with the slave
properly, but the Slave sees dif ferent
data then the Master.
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