Hi
A have proplems too. I want to change time values of FB without using direct programing. I think it is posible using special key option, but it didnt work for me. Maybe you can help me, or show some examples.
Sorry for the zombie post but someone might still be looking for this...
For what its worth I had trouble with this too, then I found a documented example and tried some parts from it, and it seemed to work, then I tried the program I'd been working on and found it worked there too.
To make a value adjustable:
It has to be something that is writable, e.g. a counter value.
Analog inputs and the results of a "Gain" block are read only. Math blocks are probably read only too.
Time switch settings can be set but the controls are scary.
So first you connect the counter to a display block and enable "special key"
Run the program on the actual controller (it doesn't work in sim)
With the value displayed press "<" (Left) and the value should flash. It can now be altered with "+" and "-". Multiple parameters can be selected via up and down. Confirm with "OK".
Sorry for stating something that ought to be obvious, but it's taken me half a day, some googling, and experimentation to find this.
Unlike "Display manager" this function does not appear to work in simulation.
Also it conflicts with "Monitoring" because the software objects to program parameters changing.