Some users experience problems when trying to make an OPC connection to Machines Simulator and the OPC server because they do not have the necessary libraries installed.
In the following thread of our forum you will find the link to download the distributables necessary for this:
https://forum.nirtec.com/index.php?topic=529.0 (https://forum.nirtec.com/index.php?topic=529.0)
Be sure you install the correct version for your system 32 or 64 bits according with your OS.
Here you can find documentation about some of the available drivers:
https://forum.nirtec.com/index.php?topic=530.0 (https://forum.nirtec.com/index.php?topic=530.0)
If you're using Rockwell Studio 5000, you must use the Controller Tags to communicate with Machines Simulator via RSLinx or Factory Talk Logix Echo, otherwise not communication will be possible.
Remember that if you use Rockwell RSLinx software with OPC, the Lite version does not allow you to make an OPC connection, so you must use the full version (Not Lite)
Here you have some tutorials you can follow:
OPC Connection:
https://www.nirtec.com/programming-allen-bradley-plc-controls/ (https://www.nirtec.com/programming-allen-bradley-plc-controls/)
Connecting Machines Simulator with Rockwell Studio 5000 using Factory Talk Logix Echo: