Good day to all!
There was a PLC V120-22-T1 with OS version 4.7.1 with a loaded working program that worked fine, but it broke the screen (it turns on, but almost the entire working screen is flooded with a black background), it was decided to buy a new V120-22- T1.
Also from the old PLC we saved the working program and loaded it into the new PLC, but the program stopped working correctly.
We began to understand what the problem was and found that the new PLC has a newer version of OS 5.04.
How to be? Is it possible to make a new version of OS 4.7.1 on the new PLC to download the program and it could work correctly?
In advance everyone is grateful for answers
Yours faithfully,
Vasili
