Hi 

Hello Zidoch;

It is relatively easy to locate data and manuals on 3rd-party equipment on the Web if you have access to the manufacturer name and model number (and the model is current).

For example, here is a basic instruction brochure for your converter, since the information was available in your screenshot: 

GC-ATC-1000 User's Manual - Grid Connect

More importantly for your problem we would need access to the manual for your display, to see the protocol details. Normally these dynamic displays use strings for the messages you want to show, with a symbol for a variable you want to introduce in the message (ex: variable Line_Speed) and control codes to interface with the display's electronics.. If it is colour, there are other symbols to understand how the color dynamics are being controlled, etc.

It has been my experience that programming of these displays is much easier on a PC. They often come with specialized software that you would need to emulate in your PLC program.

So please provide details on the make and model of your display, so we may try to help you out.

Hope this helps,

Daniel Chartier