LINK Systems OmniLink 5000 - Manual (Page 20)

2-15
bottom rather than beginning at top dead center since in many applications parts are ejected near the
top of the stroke. When the press moves through 170 degrees the monitoring begins, and until 170
degrees is passed again the die protection input will be monitored for any change. The first time that
the input closes (is connected to machine ground) the angle at which this occurs will be displayed
in the status block beside the message reading "Closed at". When the input opens (becomes inactive
or ungrounded) the angle at which this occurs will be displayed beside the message "Opened at".
The status labels displayed during this procedure are summarized below:
Action or state Capture Status label
1) Prior to using capture "Not Armed"
2) Press the CAPTURE INPUT softkey "Armed"
3) Machine moves through 170 degrees “Armed (Active)”
4) When this input is first connected to ground, “Armed (Active)”
the angle where this occurs is displayed
beside “Closed At”
5) When this input opens (is disconnected from
“Armed (Active)”
ground) the angle where this occurs is
displayed beside “Opened At”
6) Machine moves through 170 degrees again
“Not Armed”
The display of the angles where the input closes and opens is tailored for parts monitoring. If the
die protection input closes and opens multiple times, only the angle of the first closure will be
displayed. This is done in order to save the crankshaft angle at which the leading edge of the part
entered the detector. In addition, after multiple closing and opening of an input the angle displayed
will be the position of the last time that the input opened. This is done so that if the part has holes
that cause the detector to switch on and off, the final off point (or trailing edge of the part) will be
saved and displayed.
The Capture Input feature is especially useful during setup of a die protection input and its sensor.
If the function to be monitored is a cycling type (programmed as Cyclic, Transfer, In Position, or
Part Detector), a timing window must be entered by the operator to provide the unit with information
regarding where the input is expected to cycle. A simple way to determine approximately where the
timing window boundaries should be set is to first program the input as Unused (capture is available
for an input even if the input is programmed as Unused) and cycle the machine with the sensor in
operation. The action of the sensor can then be monitored using Capture Input, and the sensor switch
points can be determined without nuisance machine stops due to the input being programmed for an
active die protection type. (If the machine is running in Continuous mode, the CAPTURE INPUT
key can be pressed on each stroke to re-arm the function and repeat the monitoring.) Once the sensor
switch points are determined, the input can be programmed for its proper type and the appropriate
timing window entered for the sensor.
Section 2.12 Programmable Limit Switch Menu