Baumer BA Scatec10 15 - Manual (Page 16)

User manual Scatec-10 / -15 16 / 44 Baumer Electric AG
Version 2011-03 www.baumer.com Frauenfeld, Switzerland
C2: False pulse suppression [FP-Suppress.]
Input values: 0 = off no false pulse suppression mode will be activated
1 = on a false pulse suppression mode as defined in C3 will be activated
Function: To specify whether or not any kind of false pulse suppression mode will be
activated.
Comments: The specific mode of the false pulse suppression will be defined in menu C3.
C3:
Suppression mode [Suppr. Mode]
Input values: 00 = dyn dynamic dead time
01 = sync synchronous dead time
02 = fixed fixed dead time
03 = refl retro-reflective foil only
Function: To select the type of dead time to be used or if the Scatec should react exclusively
to the retro-reflective foil.
Comments: This menu is accessible only if menu C2 false pulse suppression was previously
activated (C2 = 1)
General concept of dead time: The time span during which the Scatec does not
respond to any occuring edges (output set inactive) is named dead time. By starting
a dead time by the end of an edge, a minimum interval between output pulses can
be enforced because edges occurring during the dead time will be suppressed, i.e.
do not initiate an output pulse nor trigger a dead time.
For example, setting a dead time allows counting the cut side of a newspaper,
because the multiple edges formed by the individual sheets do not initiate multiple
output pulses as long as they occur within the dead time triggered by the first edge
as illustrated in the following sketch.
The dead time always starts with the end of an edge.
The amber edge-LED lights as long as the laser beam strikes an edge.
Nevertheless, not every flash of the edge-LED is followed by an output pulse,
because the edge might be suppressed!
amber edge-LED
output pulse
(pulse length: p)
dead time
(length: t)
on
off
Running direction
time
t
p
high
low
high
low
w
it
h
d
e
a
d
t
im
e
n
o
d
e
a
d
t
im
e
Scatec-1x
on
off
output pulse
(pulse length: p)
on
off
dead time
(length: t = 0)