Pinnacle Systems SLT Series - Manual (Page 21)

14
SLT Series
Diagnostics and Troubleshooting
2 ...................... 2 Beams Broken
Definition:
The light guard was triggered when at
least two beams were detected broken.
Status:
RED, fail safe relays off.
Reason(s):
Floating Blank option: set to 4cm mode.
a) If no obstruction is observed, then
light curtain is misaligned.
b) Emitter Pylon is not transmitting.
Cure(s):
Remove all obstructions. If display still
reads 1 or 2, then realign light curtain
with the Floating Blank option in 2cm
mode or the Auto Blank option in OFF/
RESET position (see Installation
Procedure, Page 3).
3 ...................... 3 Beams Broken
Definition:
At least three beams were detected
broken.
Status:
RED, fail safe relays off.
Reason(s):
Floating Blank option: set to 6cm mode.
a) If no obstruction is observed, then
light curtain is misaligned.
b) Emitter Pylon is not transmitting.
Cure:
Remove all obstructions. If display still
reads 1, 2, or 3, then realign light curtain
with Floating Blank option in 2cm mode
or Auto Blank option in OFF/RESET
position (see Installation Procedure,
Page 3).
4 ...................... 4 Beams Broken
Definition:
The light guard was triggered when at
least four beams were detected broken.
Status:
RED, fail safe relays off.
Reason(s):
Floating Blank option: set to 8cm mode.
a) If no obstruction is observed, then
light curtain is misaligned.
b) Emitter Pylon is not transmitting.
Cure(s):
Remove all obstructions. If display still
reads 1, 2, 3, or 4, then realign light
curtain with Floating Blank option in
2cm mode or Auto Blank option in OFF/
RESET position (see Installation
Procedure, Page 3).
5 ...................... Relay Fault: One On / One Off
Definition:
There are two captive contact relays
inside the light curtain of which one is
open and the other is closed. This
condition should never occur because
the system is designed to always
operate both relays together.
Status:
Both the RED and GREEN lights are
on but the output circuit is broken and
the light curtain has failed safe.
Reason(s):
a) Contact on one relay welded
together keeping it closed or other
internal mechanical relay
malfunction.
b) Fault in one of the driver IC’ s
causing either a relay to remain on
or off.
c) Jumper settings on watchdog timer
IC’s are incorrectly set.
d) Fault in one of the two watchdog
timers controlling the driver IC’ s
which require a clock signal of a
period less then 1 mSEC.
e) Fault in the gate chip between the
Master and Slave computers which
allows the Slave computer to
override the Master and turn a relay
on.
f) Error condition exists within one of
the two computers.
g) The two computers disagree on
whether to turn the relays off.
h) Line voltage levels too low to
activate one of the two relays.
Cure(s):
Only reason a) can be checked by user,
all other reasons can only be checked
by authorized trained personnel.
6 ...................... Relay Fault: Both off (should be on)
Definition:
Both relays were detected as OFF
when they were signalled by the
computer to turn on.
Status:
Red light on, fail safe.
Reason(s):
a) Internal mechanical relay problem.
b) Jumpers on watchdog timer IC’ s
are incorrectly set.
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