Dear Kunbus, i need help on piTest to read both input and output data in the same time.
Since the read command seems only to read one Input or Output in a time (If i am not mistaken).
I need this to collect data for making dashboards of PID control
Read Input and Output Data in the same time using piTest
-
- Posts: 1
- Joined: 22 Feb 2018, 03:42
Re: Read Input and Output Data in the same time using piTest
Which method are you using to access the values?
Are you talking about piTest on command line or are you talking about C or Python access as shown in the tutorials? Or are you talking about logi.CAD?
You can always read and work with the complete 4 kB process image as a whole block and reading it is also consistent for your application, i.e. nothing changes in the process image while reading a block of data. When reading the process image using the picontrol driver (i.e. using Python or C or Java etc.) there is no difference between inputs or outputs. Same with piControl if you use -r 4096 you will get the complete data including in- and outputs.
Are you talking about piTest on command line or are you talking about C or Python access as shown in the tutorials? Or are you talking about logi.CAD?
You can always read and work with the complete 4 kB process image as a whole block and reading it is also consistent for your application, i.e. nothing changes in the process image while reading a block of data. When reading the process image using the picontrol driver (i.e. using Python or C or Java etc.) there is no difference between inputs or outputs. Same with piControl if you use -r 4096 you will get the complete data including in- and outputs.
Unser RevPi Motto: Don't just claim it - make it!