Hello all! Do I require the runtime license of PVI Monitor to access variables’ data from external apps developed in Python? I programmed a python script to extract some data from Oerlikon machines that have B&R hardware and on the PVI Monitor I can check that when running, active process objects as…

Yes, I do know that. Without the license I only can run it in Trial mode for 2 hours. My question is if the access to the PVI via external applications programmed in C++ or Python are blocked in Trial Mode license and ONLY allowed in Runtime. I am asking this because in my point of view it still sho…

Hi, there’s no difference about the way how PVI is accessed, every type of access is supported for 2 hours in trial mode. But please mention that if PVI is used on a system without license and is already running together with Automation Studio, then it will maybe lock immediately after using anoth…

Thank you for your quick response. Then, something is wrong here… When I try to extract the variable data using Runtime Utility Center (PVI 4.12) it works perfectly and I can read the machine variables fine. However, Runtime Utility does not allow for cyclic extractions for the MES I am building on…

Okay, so I don’t think the trial mode is the cause. Unfortunately I’ve no experience with Python. Are you using the PviPy wrapper from Github? [image] GitHub - hilch/Pvi.py: Python wrapper for B&R Pvi (process visualization... Python wrapper for B&R Pvi (process visualization in…

Hi @jpsilvaconti , on my laptop I don’t have PVI license: [image] and just for AS you see 4 Clients are connected, as Alex suggested I opened PVI snapshotViewer and made a SnapShot: [image] Then I made a test with a sw developed by R&D for our simulation, in this sw you can choose 2 different…

Hi, there are no limitations in PVI within the first two hours after starting any PVI applications. Whereas Automation Studio and Runtime Utility Center (e.g. pvitransfer.exe) have an internal licence activation for PVI all other application need a licence to run for longer than 2 hours. As Alex…

Hi Silva Can you share your code? Which libraries did you use?

Hello all! I am already pursuing this problem for a while and I feel I already tried everything. Something is wrong in the code certainly, but I do not understand what. So, when I run this code on RuntimeUtility Center, it works fine and I can read the variables! OnErrorResume Connection “/IF=TCP…

Hi, I assume that the variable you’re trying to read with with pvi.py is a local variable “SDS[0].Material” of the task “bde”, is that right? If yes, from what I know about PVI, a local variable object has always to be connected with the parent task object. Therefore I think, the path “bde\SDS[0].…

I tried with that template and I was not able to read the variable. Even on Runtime Utility Center, the variable reading has success but everything appears as “0” or ““. I think I will need an extra assistance on this topic to fully understand how this works…

PVI Monitor & External Python Application

Ask Questions B&R Software & Runtime

christoph.hilchenbac (Christoph Hilchenbach) February 13, 2026, 8:54am 21

I hope this example makes it clearer.

If you are connected to a CPU running AR version >= 4.08 you should be able to connect with ANSL.

script.zip (836 Bytes)

pvitest.zip (1.6 MB)

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PVI Monitor & External Python Application

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