Baumer BA Scatec10 15 - Manual (Page 14)

User manual Scatec-10 / -15 14 / 44 Baumer Electric AG
Version 2011-03 www.baumer.com Frauenfeld, Switzerland
9.1 Explanations on the operational parameters
Default values are either the underlined input values or the input value in [square brackets].
C0:
Pulse Length [Pulse Length]
Input values: 0.3ms – 99.9ms in increments of 0.1ms [10ms]
Function: to set the duration of an output pulse
Comments: On the one hand, the duration of an output pulse must be long enough so that the
customer’s control system can process it. On the other hand, the length of the
output pulse limits the maximum counting rate. Because output pulses must not
overlap, the interval between edges must be at least as long as one output pulse
length. If the interval is shorter, then this edge will be suppressed meaning that the
edge will not initiate an output pulse.
The following figure illustrates how every other edge is suppressed because of a too
long of an output pulse length.
The maximum acceptable output pulse length for a given production rate can be
read from the diagram below.
Scatec-1x
amber edge-LED
output pulse
pulse length p < interval a
on
off
high
low
time
p
high
low
output pulse
pulse length p > interval a
some edges are suppressed!
a
p
a
0
5
10
15
20
25
30
35
40
0.010 0.100 1.000 10.000
production rate [million copies / h]
m
a
x
im
u
m
o
u
tp
u
t
p
u
ls
e
l
e
n
g
th
[
m
s
]
Maximum acceptable output pulse length and
production rate
t: theoretical
r: recommended t
r