Danfoss MCO 305 Design Manual page 137

MCO 305 Design Guide
Adding Oscilloscope Curves
Curves are added to the Oscilloscope using the
added will depend of the type of Oscilloscope being used.
The Oscilloscope uses "Groups" to manage sets of curves. When a test is started, the Oscilloscope will confi-
gure all the curves in a group into a PDO mapping on the controller. Then each time the controller generates
a PDO message, the entire set of curve values will be transmitted from the controller to the Oscilloscope
and displayed.
When the Oscilloscope is started, a single Group is added automatically. The user is then free to add any
curves of interest to this group. The following types of curves may be of particular interest when diagnosing
problems:
− Axis process data (SDO 0x2500). For example, axis position, velocity, tracking error, etc.
− System process data (SDO 0x2202). For example, states of the digital I/O pins.
− User parameters (SDO 0x2201) ... if used by the application.
− Program variables. If the correct APOSS program is known, then any variable used in the program
can be recorded.
A single group is normally adequate for most purposes. However, if the User Mode is set to "Expert" in
Settings → Options) menu, then the Oscilloscope will also support multiple groups. Multiple groups may be
necessary, for example, if multiple controllers are being tested simultaneously. Since all curves in a group
must be associated with the same controller, if two controllers are being used, then two groups must be
defined, one for each controller.
Once the curves are added, then the Oscilloscope
Window will look something like that shown. In this
example, three curves have been added but no data
has yet been recorded so the chart is empty. Also,
the dark green "Status" column indicates that the
controller is connected but that no program is
currently executing.
__ APOSS Tools __
Add curve toolbar button. The types of curves that can be
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