trouble using keyframes to animate a float value (in animation nodes) Am learning animation nodes.

Within animation nodes, I would like to use keyframes to animate the value of a float number, but the keyframes are not having any effect.

To try this I right click on the float value and first 'add to keying set' then 'add keyframe'

it seems to work because no errors are reported and the value changes color.

But when I play the animation the keyframe seems to have no effect.   Screenshot below shows the nodes and my attempt to enter the keyframe.  (the idea is the float number then is used to place an object at a location). 

Any suggestions to make the keyframe actually work are most welcome.

thanks,
Matt
You can use Delay Time and Animate Float node in this case.



Another Method:

Create an custom property to a object(in this example Cube) and keyframe the value. then access it's value inside AN.
You can use Object Attribute Input node to do this.