I did some programs on LabVIEW which can communicate via MODBUS TCP/IP between 2 PCs. But now I would like to use a Virtual PLC which deploy a virtual IP adress. Therefore I could use my LabVIEW program to communite with this virtual PLC.
could you please advise me which Virtual PLC that I can use ?
someone here have already try it please ?
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There isn't really anything I can point you towards as far as compatibility with Virtual PLCs goes. Since you've worked with the API, you've probably observed that with TCP/IP you just need an IP address. My only suggestion is to give it a try. If you can reach the IP address of your device, you should be able to establish communication.
Thanks for you repply.
I have already try to communicate with two PCs, and it's ok.
I have another question :
If I would like to communicate with a PLC already installed. How can I have access to I/O (of PLC) from register?
Thnaks in advance.
The PLC software will imply a mapping of the physical/logical I/O onto the MODBUS address space.
This map will depend on the application and should be documented by the PLC progammer.