Pepperl+Fuchs UC-18GS Series - Sensor Cycle Time; Ultrasonic Pulse Length

UC***-18GS series
Description of Sensor Parameters
2020-11
59
8.4.12 Sensor Cycle Time
You can use the "Sensor cycle time" parameter to specify the length of a measuring cycle. The
minimum allowable cycle time depends on the range of the respective sensor and is set at the
factory. If a value exceeding the minimum cycle time is entered, the sensor pauses after its
measurement for the rest of that time period before the next measurement starts.
8.4.13 Ultrasonic Pulse Length
You can use the "Ultrasonic pulse length" parameter to select the length of the transmission
pulse. The factory default ultrasonic pulse length is set to automatic, which is also the correct
setting for the large majority of the applications. In this case, the sensor itself automatically
chooses the correct pulse length between the short and long pulse depending on the detected
object distance.
Setting in exceptional cases
We recommend adjusting the short pulse only in exceptional cases, such as applications in
which only laterally-moving objects need to be detected very quickly very close to the sensor.
This achieves only a fraction of the nominal range because the short pulse does not provide for
a large detection range.
It is helpful to adjust to the long pulse in applications in which only laterally-moving objects
need to be detected very quickly at a medium to large distance to the sensor. The long pulse
setting increases the dead band in comparison to the specified datasheet value.
Then the sensors will only use the selected pulse length for your measurements.
Note
This parameter is only visible in the DTM advanced view.
Parameter name Access Value range
Sensor cycle time Read/write <min. cycle time> ... 60000
[ms]
Table 8.30
Note
The minimum cycle time is dependent on the detection range of the respective sensor. If values
that are too small are entered in the DTM, a corresponding message will appear stating the
minimum allowable value for the selected sensor.
Note
This parameter is only visible in the DTM advanced view.
We recommend only changing this parameter after consulting our application specialists.
Parameter name Access Value range
Ultrasonic pulse length Read/write • Automatic
• Short pulse
• Long pulse
Table 8.31