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C2:
Input values:
Function:
Comments:
C3:
Input values:
Function:
Comments:
User manual Scatec-10 / -15
Version 2017-10
False pulse suppression
0 = off
no false pulse suppression mode will be activated
1 = on
a false pulse suppression mode as defined in C3 will be activated
To specify whether or not any kind of false pulse suppression mode will be
activated.
The specific mode of the false pulse suppression will be defined in menu C3.
Suppression mode
00 = dyn
dynamic dead time
01 = sync
synchronous dead time
02 = fixed
fixed dead time
03 = refl
retro-reflective foil only
To select the type of dead time to be used or if the Scatec should react exclusively
to the retro-reflective foil.
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.
Scatec-1x
t
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!
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Running direction
p
time
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[FP-Suppress.]
[Suppr. Mode]
on
amber edge-LED
off
high
output pulse
(pulse length: p)
low
on
dead time
off
(length: t)
output pulse
high
(pulse length: p)
low
on
dead time
(length: t = 0)
off
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Frauenfeld, Switzerland