I am a new user of Labview and have problem when I use DSC in my application.
In my application, I used two analog outputs to generate analog waveforms; two counters to count two pulse trains; a SCXI output to produce required current; RS485 port to coummunicate with other devices using MODBUS; and try to use DSC module to log the timestamps of another digital waveform. All these should work simutaniously. I stucked at the last part because I can get time data.
What I have done with DSC include:
1. Used MAX to set up a virtual channel for a digital input of SCXI 1162HV, passed verifying test in MAX
2. Chose DAQOPC server in server browser, passed the tests in configuration utility
3. created tags using 'configure t
ags' in tools menu.
setting update rate to 0.2s and deadbands to 1%
The problems are:
1. when I tried to connect tags to a real-time trend indicator using HMI wizard, I got an error from wizard and could not connect the tags
2. when I tested the operation using a 50% duty cycle 10Hz pulse trains, the trace view of historical data of tags in MAX showed a waveform with variable pulse width.
I also adjusted the update rate to 0.001s, but still received a strange waveform by trace view.
How can I deal with it? I really appreciate if anyone can help me out of this trouble.
Yours
Steven
