ASDA Series Application Note Application Examples
March, 2015 3-89
Figure 3.6.8 Photoelectric switch for detecting empty pack
When empty pack is detected, the controller will trigger EV in a proper time and conduct offset
compensation. Since ASDA-A2 has the feature of command overlap, skip empty pack can be
done by this function. Base on the arrangement of sensors which shown in Figure 3.6.8, when
the number of empty pack is more than one, the system could detect if the next pack exists or not
before the previous command execution is completed. The continuous trigger event of the
controller would cause command overlap. Meanwhile, when the number of empty pack is a lot,
the controller could stop the master axis (film feeding axis) and keep all camshafts in engaging
status after packing. After all empty pack is gone, operate the master axis again and the system
will return to the original operation status. Figure 3.6.9 shows the description of command
overlap.
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