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3.26 PLC Info
The PLC I/O screen is provided for maintenance personnel to determine the status of the PLC and review
the mode of Outputs and Inputs. PLC I/O screen(s) are also used to assist APPI Service Technicians,
working with your Maintenance Personnel to troubleshoot the T-300/T-375 in the field. See Figures 3-29
through 3-30.
To determine the function of each Input / Output, press the Help button to display a brief description of
each input or output LED. The PLC I/O screen also provide the run Hours and Cycles counters. These
counters cannot be reset by the operator.
3.27 Factory Settings Screen: Default Settings
These settings are additional bagger settings which should only be set by qualified technicians or by the
factory. See Fig. 3-31.
Heat Off:
The bagger is programmed to shut off the heater bar if the machine is idle for this amount of
time. The default setting is 60 minutes. To decrease this time, press the <Heat Off> button, enter the new
time (in minutes) and press the enter key.
TempRng
: The machine cannot cycle unless the heater bar temperature is within this range of the set
temperature. If the heater bar temperature is within this set range, READY will be displayed in the top
left corner of the screen. Otherwise, WAITING will be displayed. However, you can test cycle the
machine while it is coming up to temperature by toggling to the SETUP mode.
FeedDist: Feed distance setting allows you to ignore horizontal perforations which could cause
the bagger to stop at the wrong location. Since the perf sensor is "looking" for a perforation, a
second perforation could be detected. If the horizontal perforation is 1" from the bag
perforation, set this value to 2", for example. The default setting is 1".
SealDlay
: A Seal Delay timer is provided to allow air to escape before the seal bar actuates. To
decrease the volume of air remaining in the bag after sealing, increase this timer.
IndexDlay:
An Index Delay timer is provided to allow the bag just sealed to drop before the next bag is
indexed. If the bag below does not move out of the way fast enough, the bag feeding out could hit it,
causing it not to open or feed properly. If the bag feeding contacts the bag below, increase the value of
this timer.
3.28 Factory Settings Screen: Zero Perf, Zero Seal, Max Seal Program
A zero perf function is provided to register the seal point and provide a reference position for the seal
point setting.
To determine if the seal point is registered, set the Seal Point setting to the lowest setting, and press the
MC button or press the guard switch. The bag should move so that the perforation is approx. 1/8" from
the center of the heater bar. If the bag perforation is not approx. 1/8" from the perforation, perform the
following procedure carefully. If you perform these steps out of order, the bagger will not function
properly.
Step 1: Toggle the bagger to Stop, then back to Run.
Step 2: Press the <Zero Perf> button. Bag should feed slowly and stop so that the perforation behind
the pinch rollers is located very close to the perforation sensor.
Step 3: Press and hold the <Jog+> button until the perforation come through the pinch rollers and feeds
exactly centered on the heater bar.
Step 4: Press the <Zero Seal> button. Bag should now reverse the distance of the Reverse Setting.
