How to resolve destination host unreachable on time-clock?

Hello experts,

Hopefully someone can help me out with this.  We have 2 time clocks at the company that I work at and today one of them decided not to work.  Each time clock has its own IP address.  The one that works is: "10.1.81.225" and the one that does not work is:  "10.1.81.200".  There are no other devices that I am aware of that are currently using that IP address.  (although is there a way that I can check this easily so I know for sure?)  Most computers are static IP in the building.  When I ping the working one, it gives me the normal and functioning replies, but the one that isn't working right gives a reply but then right next to the reply it says "destination host unreachable".  I've checked the physical connections and everything checks out fine.  Can someone please help me with this?  Thanks in advance.