Industrial Automation V4.1 Hat Voltage Input Jumpers

S

Sean You

New member
I am currently trying to get accurate measurements in the +-10V inputs on the industrial Automation V4.1 Hat. There is a note in the python library that I need to make sure that the "selection jumper" is connected so that the measurements are accurate. However, I don't see any selection jumpers physically on the V4.1 board, though it looks like they used to exist on the V3 Board. Additionally, in the description currently for the V4.1 hat, it says "Software Select analog inputs for 0-10V or pm10V (no jumpers or DIP switches). Is there a software option in the python library for this "jumper" or am I missing where the physical jumpers exist? (currently I'm getting accurate 0-10V readings but cannnot get pm10V readings that are accurate).

Thanks!
Sean
 
alexburcea

alexburcea

Moderator
Staff member
Hi,
Let me know the card hardware version, the sentence is valuable depending on the version . Or better if you could send me a picture.

Alex.
 
alexburcea

alexburcea

Moderator
Staff member
Hi, this is the last version where the +/- is software selectable, but is so new that I was unable to update the command line for that .
Give me a day and I will update the drivers so you can use the +/-10V inputs.
Thank you for your patience.

Alex
 
alexburcea

alexburcea

Moderator
Staff member
Hi,

Please update your megaind-rpi repository as instructed by the readme.
Now the card switch from 0-10V to +/- 10V when you run "megaind <stack> pmuinrd <ch>" and switches back if you run "megaind <stack> uinrd <ch>" individual for each channel and default settings at power-up is 0-10V input.
The only inconvenience with this method is that the first read (when switching from one type to another) is invalid.

Let me know what you think how is working for you.

Alex.
 
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