Installation and Maintenance Manual: Shoe Sorter
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Installation and Mai ntenance Manual: Shoe Sorter
Published October 2019
Rev.A1
35
SENSOR
TYPE
LOCATION
STATE IN
NORMAL
OPERATION
STATE
DURING
FAULT
TYPE OF
FAULT
DETECTED
RECOMMENDED
FAULT RESPONSE
NOTES
Inductive
proximity
Crash
detection
gate
(internal)
HIGH
LOW
Debris or a
thrown slat
inside the sorter
Ignore momentary
faults. Shut down the
sorter drive and alert
the operator for a
sustained fault. The
gate will need to be
mechanically reset
after a fault.
Multiple gates
(typ. 1 per 50
feet), see the
system
drawing for
quantity and
location
Inductive
proximity
Crash
detection
gate
(underside)
HIGH
LOW
Debris or a
thrown slat
hanging from the
slats underneath
the sorter
Ignore momentary
faults. Shut down the
sorter drive and alert
the operator for a
sustained fault. The
gate will need to be
mechanically reset
after a fault.
Multiple gates
(typ. 2 per
sorter), see
the system
drawing for
quantity and
location
Photo-
electric
(retro-
reflective)
Induction
conveyor
Varies
(detects
product)
HIGH
(contin-
uous)
Product jam at
the sorter infeed
Hold product upstream
of the induction
conveyors and alert the
operator for a
sustained block
indicating a jam
Monitored for
divert timing
as well
Photo-
electric
(retro-
reflective)
Discharge
transition
Varies
(detects
product)
HIGH
(contin-
uous)
Product jam at
the sorter
discharge
Shut down the sorter
and alert the operator
for a sustained block
indicating a jam
Photo-
electric
(retro-
reflective)
Downlane
spur
Varies
(detects
product)
HIGH
(contin-
uous)
Lane full or a
product jam at a
sorter downlane
Recirculate packages
destined to the
downlane. Alert the
operator if a jam is
indicated.
Supplied by
others.
Typically 1 per
divert
HTL incre-
mental
encoder,
10k lines
Tail
Pulse train
proportional
to com-
manded
sorter speed
Pulse
train is
absent
or out
of sync
with the
com-
manded
sorter
speed
The sorter drive
is not operating,
the chain is
severed, or a
sprocket is
derailed
Not typically monitored
directly by the system
PLC.
Typically used
to drive the
AC servo on
the knife edge
induction
conveyor.
