LINK Systems System 2500 PLS - Manual (Page 47)

System 2500 Operating & Installation Manual - Revision 07 2-39
Figure 8
Probes used with Static,
Normally Open inputs
CAUTION! THIS IS AN AUTOMATICALLY STARTING POWER PRESS AND
SHALL BE PROPERLY GUARDED PER OSHA 1910.217 INCLUDING TABLE 0-10.
SERIOUS INJURY CAN BE CAUSED TO THE MACHINE OPERATOR OR TO
OTHER PERSONNEL IF THIS WARNING IS NOT HEEDED.
2.9 Die Protection Modes of Operation
Each of the eight DIE-PROT inputs can be programmed for one of seven different modes of die
protection: STATIC, CYCLIC, TRACK, TRANSFER, IN POSITION, 1 PART or 2 PART parts
detection.
2.9.1 STATIC
Static inputs are derived from sensors that monitor events that are independent of the production
machine cycle. Examples are sensors monitoring end of stock, stock buckling, and misfeed. The
static input can be programmed as either
normally open (not grounded), or
normally closed (grounded), and can be
programmed to issue an emergency stop
or top stop when a fault is detected.
An example of the use of a normally open
input is stock buckling detection, as
shown in Figure 8. The stock to be
fabricated is placed between a dual probe
in the normal position. The probe
remains open (ungrounded) unless the
stock buckles upward or downward far
enough to touch the upper or lower
portion of the probe, closing (grounding)
the normally open input, causing a fault.