Grain Systems Bucket Elevtors, Conveyors, Series II Sweeps PNEG-1895 - Manual (Page 56)

7. Troubleshooting
56 PNEG-1895 V2 Electronic Distributor Control
Fault Code Descriptions, Possible Causes and Solutions
(Continued)
Code Fault Type Description Cause Solution
401 Overtravel
Overtravel left
(home side)
detected during
position move. Controller has detected
signal indicating spout
has traveled past position
#1 toward back wall.
Controller has received a signal from proximity sensor
on home side of assembly (noted as “red” on sensor
mounting plate and run to red terminal blocks) during a
position move, indicating spout has overtraveled
expected position. Verify that proximity sensors are
in correct numbered positions on mounting plate
(See Page 43) , are wired to the correct terminal blocks
and that no metal objects are within 2 mm (0.080") of
the black plastic sensing surface. Metal flag welded to
shaft should only pass over home proximity sensor
during a homing procedure. Flag should trigger
proximity sensor after passing position #1 toward back
wall of distributor, just before internal spout makes
contact with back wall.
402 Overtravel
Overtravel right
detected during
position move.
Controller has detected
signal indicating spout
has traveled past last
position toward back wall.
Controller has received a signal from proximity sensor
on far side of assembly (noted as “grey” on sensor
mounting plate and run to grey terminal blocks)
during a position move, indicating spout has
overtraveled expected position. Verify that proximity
sensors are in correct numbered positions on
mounting plate
(See Page 43) , are wired to the correct
terminal blocks and that no metal objects are within
2 mm (0.080") of the black plastic sensing surface.
Metal flag welded to shaft should never pass over
overtravel proximity sensor during normal operation.
Flag should trigger sensor only if spout has traveled
past the last position.
501 Encoder
Homing operation
has timed out
before completion.
Controller did not receive
signal from home
proximity sensor within
the maximum allowable
time limit.
Homing operation rotates distributor spout to a
position between the back wall of the distributor and
the center of the #1 position to set a constant zero
point. If controller does not receive signal from home
proximity sensor within a pre-defined time limit,
homing operation fails. this may be caused by a
mechanical obstacle stopping rotation or by the
sensor not being triggered by the metal flag welded
to the drive shaft. If the gap between the proximity
sensor and the flag welded to the drive shaft is too
large, the sensor will not trigger and homing will fail.
Verify that the gap between sensor and flag is
0.050" ± 0.010". Manual key switch may be used to
check this. If gap is correct and red LED light on
sensor illuminates in presence of shaft flag, verify that
the sensor is wired to the correct red terminal blocks,
and that diagnostic screen shows home prox “on”
when flag is over top of sensor.
601 Encoder
System has
detected a change
in position without
a move command
from PLC.
Controller has measured
movement of spout
assembly without user
input. This may be caused
by use of the manual/key
switch override or by other
mechanical issue. If fault is caused by use of key switch, distributor may
be returned to a position by performing a “move”
command from move screen. Distributor will force a
homing operation before completing move command
to ensure accurate positioning. Controller should
return spout to the selected position on completion
of homing.