Configuration and Analysis with DTM via IO-Link
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7.6
Observation Menu Option
Figure 7.14
You can use the
Observation
menu option to track and record data from the ultrasonic sensor
over time, and the corresponding behavior of the switching and analog outputs. You can
choose from the "Visual observation" (1) or "Event-driven data logging" (2) application focuses.
Visual Observation
The visual observation functions (1) allow you during commissioning for example to observe
whether data and switching characteristics of the sensor behave as intended.
When you first access the
Observation
menu option in the DTM, automatic recording of data
will start in the graphic. From this point in time, recording will run continuously in the back-
ground. The data display works according to the "follow-mode-principle." It will always track
the current measured value in accordance with the rescale settings in the x-axis and make sure
it is visible in the display. You can save the data displayed in this trend graphic in a file in various
file formats for evaluation at a later stage.
Placing the check mark in front of the available measured variables or output statuses selects
which data will appear in the graphic.
Event-Driven Data Logging
Event-driven data logging functions (2) allow you, for cause analysis for example, to monitor
sensor logic in such a way that an event occurring sporadically is recorded in a file. You can
specify the recording conditions from predefined trigger criteria such as changing the status of
the switching output or a change to the value of the distance measurement. The DTM function
then observes the sensor and writes the measured variables and output statuses to a file if an
event occurs.
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Note
If the DTM is closed whilst data is being recorded, recording automatically stops. Values
recorded up to this point in time are and will remain in the corresponding file.
