21
EDDYSENSOR Operating Manual
Prescaler
The standard setting for the module with an encoder is 1 pulse per cm,
using a standard encoder of 50 pulses/rev and an encoder wheel
circumference of 50 cm. A prescaler is necessary if the encoder frequency
limit of 200 Hz is exceeded or a specific length resolution is required. On
leaving the factory, the prescaler is set to 0.
The prescaler operates according to the following formula:
f
in
for n = 0 or 1
F
out
=
f
in
/n
for n > 1
where n is the prescaler switch setting.
The limit for the encoder frequency is
f
max
= 200 Hz without prescaler
f
max
= 19.8 kHz with prescaler
{
There are two outputs available (OUT2 and
OUT1) that can be selected singly or together
as required. OUT2 is also available undelayed
as OUT3 to activate warning devices such as
a lamp or horn. The Channel switch assigns
the front end unit(s) to activate the output. It is
set to WO (wired OR) on leaving the factory.
WO is always activated when a defect signal
arrives. For EDDYSENSOR, it does not need
to be changed. The ON position is indicated
by the position of the numbers.
OUT2
OUT1
OUTPUT switches
The line mode is selected using the
ENCODER|TIME switch (whereby the usual
setting of the switch is ENCODER) as most
applications run using an encoder. In lines
with a constant speed, a time base could be
used (although it is not recommended) where
the switch is set to TIME and the time basis
used to delay the output signals.
ENCODER|TIME switch set
to ENCODER here
Line mode
Activating the outputs
