William_B

 

andrewdaw1978

hi 

i am quite new to the TIA so bare with me 

i have a KP300 and want to use the function buttons on the panel in my logo software. the logo side of things i am ok with. in the TIA i have sorted the tags out and the info needed for that but i am struggling with the event part of it as when i click on the drop down for that button there is a vast selection of functions to chose from.

so which one do i need to select for the software to know its being used as function button

thanks 

andrew

Hi Andrew.

Do you have your answer yet?

The full set of events that is available is shown in the picture. Normally I use the "Release" one to switch a bit ON and then the PLC switches it OFF when it is used.

With the LOGO you might want something else. Here you can have the "Press" event switch the bit ON and have "Release" even switch the bit OFF. That means that the memory bit will be ON for as long as the user press down the button.

Now to the heart of what you asked about..

These functions shown above will manipulate the bits. The ones marked with "....BitInTag" will manipulate a bit inside a byte / word / dword.

"Invert" changes the state of the bit to the opposite to what it is now. "Set" for switching ON. "Reset" for switching OFF.

"SetBitWhileKeyPressed" will be an alternative to what I suggested earlier. This is placed in "Press" event and nothing is needed in "Release" event.

A little late or still helpful?

As (trivial) exit note...
I am asking the Moderator to move this topic to
 SIMATIC WinCC (TIA Portal)
where other topics about the WinCC component
of TIA Portal is posted.

w

 Hello, William_B.

I had the same question before.

Found your useful topic.