I’m assuming you are using this from a particle system?
You can animate values in the particles system with a sin ( for instance ), and then pass these parameters to the material.
For a panner, you’ll need X and Y coords, so Param1 and 2. Append them.
Another way ( easier I think ), is to drop the particle system in a BP. Then you can set the parameters to anything you like and the PS will pass them to the material.