4.10.1. Overhang Monitoring With Time Delay - Cedes ObjectC 100 I/O Programmer's Manual

ObjectC 100
Figure 17: Overhang monitoring

4.10.1. Overhang monitoring with time delay

This mode does not need any additional front (SF) or back (SB) sensors. By defining a "zc" beam the light curtain
is divided (configured) into a carrier zone (CZ) and goods zone (GZ). When a beam in the goods zone is
interrupted, at least one beam from the carrier zone must also be interrupted, otherwise the overhang output will
be activated.
If a certain amount of overhang is allowed then a time difference between a goods zone interruption, and a
carrier zone interruption is allowed. The allowed time difference "t_ot", can be adjusted with Pot 1 and depends
on the transport speed. The minimum overhang output signal duration "t_out" may also be adjusted, with the aid
of Pot 2.
Figure 18: Example no Overhang
Figure 19: Example Overhang front side
30
OB Overhang Back
OF Overhang Front
AOF Allowed Overhang Front
AOB Allowed Overhang Back
zc Top beam carrier zone
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CZ Carrier Zone
GZ Goods Zone
SF Sensor Front (optional)
SB Sensor Back (optional)
Programmer's Guide
t_ot Allowed
Overhang
duration
t_ot Allowed
Overhang
duration
t_out Minimum
output duration
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