2 years late, but the answer is yes, it is possible for example by doing an http request.

See: viewtopic.php?f=17&t=8605&p=69242#p69242

Here is a simple way to set the animation: // 6 = Fireplace http://localhost:8080/json.htm?type=command&param=applyzwavenodeconfig&idx=10&valuelist=72_Ng%3D%3D // 7 = Storm http://localhost:8080/json.htm?type=command&param=applyzwavenodeconfig&idx=10&valuelist=72_Nw%3D%3D // 8 = Rainbow http ...