Switching Outputs - Leuze electronic CML 720i Ex Operating Instructions Manual

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.
The output behavior can be changed to "dark switching" via the respective fieldbus interface (see
chapter 9 et seq.), via the receiver control panel and via the
(see chapter 12).
4.11.2 Time functions
Each of the individual switching outputs can be assigned one of the time functions described in the
following table.
The accuracy of the switching delay is dependent on the measurement frequency. Observe this
especially in cascaded operation.
Time function
Start-up delay
with re-trigger
Switch-off delay
with re-trigger
Pulse stretching
Pulse suppression
with re-trigger
The various time functions can be configured via the respective fieldbus interface (see chapter 9
et seq.) or via the
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.
Filter depth "3" = only those beam states that were stable over three measurement cycles are output.
Filter depth can be configured via the respective fieldbus interface (see chapter 9 et seq.) or via
Sensor Studio
the
Leuze electronic
Selectable Description
Duration
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.
0 ... 65000 ms Time that the sensor delays the switching back of the
output if the object leaves the detection range.
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.
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.
Sensor Studio
configuration software (see chapter 12).
configuration software (see chapter 12).
CML 720i Ex
Sensor Studio
configuration software
Functions
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