Lenze EVS93xx CrossCutter - Manual (Page 92)

Cross Cutter
Features of the "Cross Cutter" prepared solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN 2-78
2.5.12 Reject gate control
A reject gate can be used to divert material to a different material flow direction in order, for
example, to collect rejects in a waste container. The reject gate can be controlled using a digital
signal. The signal is output dependent on the line speed (to ensure that the reject gate opens at
an appropriate speed in relation to the prevailing line speed, see Figure 31). In the prepared
solution, this signal is both permanently linked to digital output 3 (DIGOUT_bOut3_b) using
9300 Servo PLC or digital output 1 (DIGOUT_bOut1_b)using ECS and linked to bit 25 of
application status code C4150/000 (g_bOpenRejectGate global variable). The reject gate
should open as soon as this signal becomes active (g_bOpenRejectGate global variable =
TRUE). Delays in the opening or closing of the reject gate can be compensated by entering a
switching delay time (C3680/000). The distance between the reject gate and the cross cutter is
defined in code C3679/000 (see Figure 30). There must only ever be up to one reject material
block and one good material block in the space between the knife drum and the reject gate (see
Figure 32). Reject gate control is always activated automatically whenever the cross cutter
switches to reject operation. This is done in code C4137/000 by selecting operating mode 2 for
reject operation (g_wProfileSelector global variable = 2).
Figure 30: Representation of reject gate control
Reject container
Reject
Good material
Reject gate with
defined switching
delay time
Distance from reject gate to knife drum
Line speed