08-21-2017 12:07 PM
Hi,
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 ?
Solved! Go to Solution.
08-22-2017 02:35 PM
Hi Fred,
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,
Peter George
Applications Engineer
National Instruments
08-29-2017 08:08 AM
Hi george,
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.
08-29-2017 09:00 AM
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.