Dear NI Community,
I'm currently trying to start a sweep operation (from 0.0015 mA to 0.0055 mA with 3000 steps) with Keitley SourceMeter and at the same time read in voltage values with NI 9205. My problem is that the two processes should be synchronized. I actually already did this synchronization in LabVIEW and now I want to do it with Python.
I have already configured SweepOperation on Keithley SourceMeter and now I am able to have SourceMeter give a signal to trigger NI 9205 via digital I/O channel every time SourceMeter starts SweepOperation. The configuration of NI 9205 is also already done.
Here is the code I wrote for a measurement round:
task_lesen.start()
data = task_lesen.read(3000)
system.inst.write("smua.trigger.initiate()")
system.inst.write("waitcomplete()")
task_lesen.wait_until_done(timeout=10)
task_lesen.stop()
system.messdaten = data
In the third line SweepOperation is started at SourceMeter. But before the program comes on the third line, the program stays on the second line (data = task_lesen.read(3000)). The program waits here until it receives a signal via the PFIO channel. But to get this signal, the third line must be done first. If I write the second line after the third line, then the signal for trigger is already gone and the NI9205 can't get this signal and doesn't start the measurement either.
I would really appreciate if you would help me with this problem.
Best regards
Ali EGIN
