mteunissen - 2020-06-03


I'm using a Raspberry Pi 4 in combination with a Siemens ET200SP, but here's the problem:
My the value of my input is only updated at +- 4 Hz, while my Profinet IO task is running at 4 ms interval, as are all my other tasks.
If i let an analog output card send a sine wave directly to the analog input card, the trace shows a delayed signal with big jumps.
I have checked the output signal with an oscilloscope, end the output is exactly as it should be.
Also directly outputting the input signal again gives the same "blocky" signal on an oscilloscope.
can anyone help me to get my input values updated at a higher rate?