Functions
Leuze electronic
CML 730-PS
36
4.11 Switching outputs
4.11.1 Light/dark switching
The behavior of switching outputs Q1 to Q4 (or Q1 to Q2) can be configured with respect to light/dark
switching. The setting ex works is “light switching”, i.e., the outputs are activated if the light paths are free
and become inactive if an object is detected in the measurement field.
4.11.2 Time functions
Each of the individual switching outputs can be assigned one of the time functions described in the
following table.
4.12 Interference suppression (filter depth)
To suppress any faulty measurement values that may occur due to interference (ambient light, electromag
-
netic fields, …), the filter depth of the light curtain can be increased.
“Filter depth” means that an interrupted/free beam is not included in the further data evaluation until the
same beam status is recorded for the set number of measurement cycles.
Filter depth “1” = the beam states of each measurement cycle are output.
NOTICE
Error message during teach-in of the height area using the configuration software!
If the detection field of the light curtain is not free when the
Teach height area
function is executed using
the
Sensor Studio
configuration software, an error message is displayed.
Remove all objects located in the detection field of the light curtain.
Restart the
Teach height area
function.
A changeover to dark switching can be defined via the interface (see chapter 10), at the receiver
control panel or using the
Sensor Studio
configuration software (see chapter 12).
The accuracy of the switching delay is dependent on the measurement frequency. Observe this
especially in cascaded operation.
Time function
Selectable
duration
Description
Start-up delay
with re-trigger
0 … 65000 ms Time that the sensor delays the start-up process after
detecting an object.
By means of a start-up delay, it is possible to suppress,
e.g., upward-protruding packaging remnants (stretch
wrap, etc.) during pallet height monitoring.
Switch-off delay
with re-trigger
0 … 65000 ms Time that the sensor delays the switching back of the
output if the object leaves the detection range.
Pulse stretching
0 … 65000 ms Minimum time that the state of the output is retained
independent of what the sensor detects during this time.
Pulse stretching is necessary for, e.g., hole recognition if
the PLC cycle time does not register short pulses.
Pulse suppression
with re-trigger
0 … 65000 ms Minimum time that a measurement signal must be pres
-
ent in order for the output to switch. Short interference
pulses are thereby suppressed.
The various time functions can be configured via the interface (see chapter 10) or via the
Sensor Studio
configuration software (see chapter 12).
