LINK Systems System 2500 PLS - Manual (Page 53)

System 2500 Operating & Installation Manual - Revision 07 2-45
Figure 15
In Position mode timing
Figure 16
Single part mode timing
die closes. An illustration of the In Position timing sequence is shown in Figure 15.
2.9.6 1 PART
The One Part mode is used to monitor parts ejection for dies producing one part per stroke. This
mode functions much like the cyclic mode, the difference being that the timing channel must
turn on before, not while, the part is being
ejected (activating the sensor). The operator
will be prompted for a timing channel number
when 1 Part mode is selected. This is the
internal timing channel of the System 2500 that
will act as a 'window' for ejection of the part
(see Section 2.8.3 for more information on
timing channels). The timing channel should be
set to turn on before the part is ejected, and off
after the part is ejected, as shown in Figure 16.
When programming an input as a One Part
Detector type, the operator must choose whether
it will be required for the part to completely
pass the detector during the timing window. If
it is desired that the part completely pass (i.e., the detector will become inactive again before the
timing window turns off), then the input should be programmed as 'Part Pass:YES'. If it is only
required that the part enter the detector during the window but does not have to completely pass
through until after the window, then the input should be programmed as 'Part Pass:NO'. This
signifies that only the leading edge of the part must be seen during the window, as might be the
case for a very long part. Note: If the input is programmed for ‘Part Must Pass’, the sensor
is not allowed to become active outside the window or a fault will be generated. This
provides protection against a stuck part ‘bouncing’ on a probe-type detector and satisfying