Functions
Leuze electronic
CML 730-PS
37
Filter depth “3” = only those beam state changes that were stable over three measurement cycles are
output.
4.13 Power setting
Functions for specific application scenarios:
• Detecting transparent films
The sensitivity of the receiver can be increased so that the light curtain detects extremely thin trans
-
parent films in the measurement range.
Configuration: see chapter 8.4 "Setting the function reserve"andsee chapter 11.7 "Example configu
ration – Detecting transparent films"
• Reliable beam penetration through opaque films
The transmitter output power can be increased to such an extent that the light curtain can penetrate
opaque, only semi-transparent objects.
Configuration: see chapter 8.4 "Setting the function reserve"andsee chapter 11.8 "Example configu
ration – Reliable beam penetration through opaque films"
The desired power level can be preset as a target function reserve (function reserve mode
Target function
reserve
). The automatic adjustment function of the light curtain then sets the appropriate transmitting
power and receiving sensitivity.
Optionally, the transmitting power and receiving sensitivity can be adjusted separately in order to achieve
an optimum result for the objects to be detected in a specific application (function reserve mode
Tx/Rx
power
).
Function reserve mode
Target function reserve
The light curtain adjusts automatically to a nominal value. The desired power level is set based on the
nominal value for the light quantity which is to reach the receiver.
To reach the nominal value, the device first adjusts the transmitting power. If this is not enough, the
receiving sensitivity is adjusted.
A target function reserve of “n” results in n times more power being used than would be necessary if the
measurement field were free.
Adjustment ranges:
• Nominal value: 1 … 999
Standard setting: 999
• Switching threshold: 5% … 98%
• Hysteresis: reactivation threshold after switching (5% … 80%)
This smooths any bounce around a limit value.
Function reserve mode
Tx/Rx power
Individual, separate adjustment of the amount of light that the transmitter emits (transmitting power, Tx)
and of the gain in the input circuit at the receiver (receiving sensitivity, Rx).
Adjustment ranges:
• Transmitting power: 3 … 100 [%]
• Receiving sensitivity: 1 … 22
• Switching threshold: 5% … 98%
• Hysteresis: reactivation threshold after switching (5% … 80%)
This smooths any bounce around a limit value.
The configuration of the filter depth can be defined via the interface (see chapter 10) or via the
Sensor Studio
configuration software (see chapter 12).
At maximum receiving sensitivity, the receiver reacts to extremely minor violations of the detec
-
tion field.