Lenze EVS93xx CrossCutter - Manual (Page 81)

Cross Cutter
Features of the "Cross Cutter" prepared solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN 2-67
2.5.10 Mark window
It may be necessary to only evaluate certain mark signals. This will be the case if there are
other marks on the material to be processed in addition to the print marks but these other marks
will not generate a response (see Figure 24). A mark window is defined for such scenarios. This
provides a means of checking whether the print-mark signal received is located in a specific
position window. The incoming print-mark signal must be located in this position window in order
to be evaluated. The size of the position window is set by the user in code C3669/000
(g_dnTPPositionWindow variable). All print-mark signals outside this window are ignored (see
Figure 25 and Figure 26). If there are no print-mark signals in this position window, a message
will be generated and displayed in bit 26 of application status code C4150/000
(g_bMaxNumberOfTPOutOfWindowIncreased variable = TRUE). The user can set a limit
indicating when a message should be generated (the user should write the value of this limit in
code C3670/000 (g_wMaxNumberOfTpOutOfWindow variable)). This warning signal is reset
automatically when the next valid mark signal appears within the position window. The mark
window is only active when mark correction is selected. Mark sensor signals will be blocked
when mark-controlled operation is deselected.
Figure 24: Example of an application in which mark windows are used
Print mark
Mark signals to
be ignored