LINK Systems OmniLink 5000 - Manual (Page 24)

3-3
Figure 3.4
Cyclic input timing
Figure 3.5
Transfer input timing
monitor events in the production process that may not occur every stroke, but must occur within
some number of strokes. An example of such an application is slug detection, where under normal
operation slugs are allowed to build up and be ejected after several strokes. In such a scenario, a slug
would not be detected by the sensor on every stroke, and this would produce a fault were the stroke
delay counter not used. The delay counter allows the operator to enter a number representing the
maximum number of strokes that can be run consecutively without the sensor becoming active
within the timing window. If the sensor does not become active within the window for a number
of strokes exceeding the counter number, then a fault will be generated. By contrast, if the sensor
does become active within the window on some stroke before the counter expires, then the counter
is reset and the full count is again allowed. If the operator desires that the sensor be required to
become active on every stroke, then a value of zero should be entered into the counter. (Note that
although the sensor is allowed to remain inactive throughout a stroke when the stroke counter is
used, the opposite is not true; e.g., the sensor is not allowed to remain active through an entire stroke
or a fault is generated.)
*The stroke delay counter on Cyclic inputs is available when
firmware revision 2.2 or greater is installed on the board
Section 3.3 Transfer
Transfer type inputs are used to monitor automatic transfer
mechanisms. Some progressive dies cut the part away from the
stock at an early stage in the die. Automatic transfer mechanisms
are then used to move the separate pieces to the next stage in the
die. Each gripper on the transfer mechanism should have a
switch to detect that each part is in place in the transfer
mechanism. These switches can be wired to inputs programmed