The oscilloscope function integrated in the drive controller enables variables from different tasks with different cycle times to be recorded in an oscillogram, e.g. variables from the motor control and from the PLC application.
The data is collected and partially buffered in order to be able to transfer it consistently into a common memory area.
Intermediate storage is used for data where it is necessary for reasons of data consistency or to compensate for runtime jitter, e.g. for data from the PLC application. The necessary intermediate storage causes this data to be "older" than, for example, the directly recorded data from the motor control task.
In the graphical representation of the oscillogram via an engineering tool (Easy-Starter or PLC-Designer), this different "age" of the data (different sample times) is not currently adjusted.
The signal curves of the temporarily stored data therefore have a time offset in the oscillogram shown to the directly recorded data.
The size of the time offset depends, among other things, on the cycle time of the PLC application, as well as on the signal flow of the recorded variable and is in the range of >= 1ms
