[v570 Blank Screen...]

Hello. 

I had the same problem, like d7branko ,  but only with V350-35-TU24, I set BinLib and factory BOOT,  when I can download a new O/S for this PLC?

[Who can help for beginner?]

6 hours ago, lawry said:

Mike_uz, please call hmi display "My Display" in main routine

Yes, thanks, I did it

[Who can help for beginner?]

18 hours ago, Flex727 said:

You need to call Subroutine 1 in your Main Routine or it will not run the ADD function.

I don't see anything wrong with Display 2 except you've changed the background color to black.

Thank you Flex727, I did it,

I thought that connects between Main Routine and Subroutine 1 is automatically and My display is open

Very pity, that in VisiLogic is no emulation and every changes must be burned by the PLC

[Who can help for beginner?]

and 2-nd display does not open

[Who can help for beginner?]

 Flex727, please, check it

Math Funct.vlp

[Who can help for beginner?]

Sorry, great programmers, for stupid questions in this topic, but I'm study and I suggest to make this topic for beginners.

PLC V350, example, math function A+B=C . I set block ADD in Ladder,  in HMI set  3 numeric button for A,B,C. I made connections in variables  to A,B,C, I enter numbers in 1st and 2nd numeric button, but in 3rd (C) not changes (addition).