Loma IQ2 Service Manual page 61

Reject options
Pulse:
When a contaminated package is detected the reject delay time is counted down, in
order for the package to travel from the photo eye to the reject device, where upon the
reject is turned on for a time equal to the reject dwell time. Typically, this mode of
reject would be used for air blast or pusher type rejects for the accurate rejection of
small packages at high speed. This option is only available if a photo eye (PEC) is
fitted for product registration.
Pulse extension:
This mode of reject is the same as pulse mode, described above, except that the dwell
time is extended if a second contaminated product reaches the reject point before the
dwell time from the first contaminated product has timed out. This could typically be
used with an air blast or retracting band reject device, but not a pusher type device.
This reject mode is always available, whether or not a photo-eye is fitted.
Toggle:
When a contaminated package is detected the reject delay time is counted down, in
order for the package to travel to the reject device, where upon the reject device state
is toggled. No Reject dwell entry will appear in the Product setup menu for this mode of
operation, as it is not required. This reject mode is only available if a photo-eye is fitted.
Dwell extension:
When a contaminated product is detected the reject device is immediately activated,
and stays activated for a time equal to the reject dwell time. If a second reject product
is detected before the dwell time has timed out, then the dwell time is counted down
from the beginning again. This mode cannot be used if a PEC has been fitted for
product registration purposes, and that no Reject delay entry will appear in the Product
setup menu.
Reject till accept:
When a contaminated product is detected the delay time is timed out, at which point
the reject device becomes activated. The reject device will then stay activated until an
uncontaminated product reaches the reject point. This reject mode can only be
selected if a photo-eye has been fitted to the system.
Reject relay
The reject relay can be set to be either normally energised or normally de-energised
(the normal state is the not rejecting state). For failsafe applications the relay-state
should be normally energised, shown as ENERG on the display, so that if the power
fails to the system the relay will drop out causing rejection of non-inspected product.
Module 7026
Configuration and Set up Information
5-39