Barry-Wehmiller Accraply 204RH, Operation And Maintenance Manual

Page: 28 / 97

20 SECTION 1: SYSTEM OPERATION
EJECT VERIFICATION/BIN FULL SENSOR
The Eject Verification/Bin Full is a Sick photoelectric sensor with reflector and complimentary outputs for fail-safe
operation. It is connected to the PLC and mounted on the reject bin. After a product fails inspection, the eject cylinder
will push the product into the eject bin. After this sequence is initiated, the PLC opens a window where it will expect
to receive an output from the eject verification/bin full sensor. If the sensor does not see a product shortly after the
system was commanded to eject, the system will stop and an eject verify fault will occur. The same sensor also
performs the bin full function. If the sensor is blocked for a set value of time, the PLC determines that the bin is full,
and the system will stop. A bin full fault will occur.
LOW LABEL SENSOR
Low Label sensor is Omron photoelectric sensor with adjustable distance setting. The sensor is mounted to the label
applicator and aimed at the unwind. It is connected directly to the labeling head. The low label sensor detects the
distance between itself and the outer surface of the label roll. When the outer surface of the roll becomes outside the
detection distance, the sensor sends an output to the labeling head. The labeler has I/O connected to the system PLC.
LABEL SENSOR
The labeling head is equipped with an ultrasonic label sensor for detecting clear or opaque labels. The label sensor
controls dispense functions by detecting the gap between labels. The labeling head uses the signals to dispense
labels and compensate for missing labels on the web.
CYLINDER HOME/END SWITCHES
Each cylinder will have two reed switches to monitor home and end positions. These positions will be monitored by the
PLC which will signal a fault if a cylinder is out of position or sequence.
PRESSURE SWITCH
There is a Keyence pressure switch monitoring the air pressure at the air inlet. The pressure switch will be set to give
an output when the pressure drops below 80PSI.
GENERAL INFORMATION