Clicking Force on the Force Variables doesn't seem to work

[Macktek]

I am using Exercise 1, and trying to Force Start Button input I.0.0 to be False all the time.
I tried also to force true. The current value shows on the force variable window, but it will not force the value.

Thanks for any help.

[EasyPLC_Master]

Hi! a digital input is an incoming signal for PLC side, this means the PLC reads the hardware channel to know what is the physical value. A input signal can not be forced, only PLC outputs values, variables, data stack.... (program elements)

[Macktek]

Ah. Thanks.