2
0
1
5
-0
9
34
Operation and communication
When the reading head enters the range of an event marker, it sets an event flag in the output
data. You also have the option of triggering a defined action when an event occurs by
parameterizing one of the outputs accordingly (). Actions of this type can be initiated when a
certain event, all events or events from an event list occur.
The 1 meter long event marker can be shortened. However, the minimum length should be 30
mm (3 codes). If the travel speed of the reading head increases, a longer event marker is
required. If the reading head travels at maximum speed, a full length event marker of 1 meter
must be positioned over the code strip.
The minimum length of an event marker can be calculated according to the following formula
depending on the travel speed and the trigger period:
L
Event marker
= 30 mm + V
max
[m/s] * T
trigger
[s] x 2
With auto trigger, the trigger period is 0.025 s.
Example calculation
At a speed of 3 m/s and with a trigger period of 25 ms, the minimum length of the event marker
is therefore:
L
Event marker
= 30 mm +3 m/s * 0.025 s * 2 =
180 mm
The printed event number and the inverted text identify event markers in contrast to the
identification on code strips (white text on a black background).
The illustration shows part of the event marker #127
Refer to the Accessories chapter for order information relating to event markers.
Note!
When placing an event marker on the code strip, make sure that the event marker represents
an accurate continuation of the grid on the code strip where possible.
