Commissioning B 3
ekrPro Com
60
web guide controller EDV No.: MD.191.01.05/1.6.x Chapter: B 3
with analog sensors Date: 23.11.2007 Page: 56/73
B 3.7.5.8 Add. Functions – Special function
Explanations for the requirements and function of both special
functions can be obtained under point 3.5.8. The parameter settings
are carried out as follows:
B 3.7.5.8.1 Tear Off Det. – Tear Off Detection
Setting of the parameters for the function Tear-off detection is
made separately for each guiding mode. If necessary, a different
sensor can be allocated as the tear-off detection sensor for each
guiding mode. It is also possible to allocate two different guiding
modes with different parameters to a single sensor.
1. Select Add. Functions in General Setup and then select the
Tear Off Det. sub-directory afterwards.
Confirm the respective selection by pressing ENTER.
2. Select the desired guiding mode (Edge 1, Edge 2, Edge 3,
Center 1&2) from the option list.
Confirm the selection by pressing ENTER.
3. This will open up the inputting window for the selected guiding
mode. The following separate parameters can be set:
► Sensor:
Selection of the sensor with which tear-
off detection is to be implemented.
► threshold [%]: Percentage covering of the sensor
measuring band, above which a change
is detected as a tear.
For the example value entered here
(80/20), this means that the function
detects a tear, if more than 80% or less
than 20% of the sensor measuring band
is covered.
► sig. chg. limit. [%/4ms]: Maximum permissible rate of
change of the sensor signal in %
per 4 ms
(Scanning cycle = 4 ms, i.e. the
sensor measurements are read
every 4 ms).
A tear is detected, if the rate of
change of the sensor signal
exceeds the percentage per 4 ms
set here.
The values to be set are
calculated according to the
formula on the following page.
► delay [ms]: Delay time in ms from detection of a tear
until blocking of the guiding system.
► hold [ms]:
Blocking hold time in ms after the
detected end of the tear until the blocking
is lifted, i.e. until the guiding system is
activated.