Hi Walt,
     
Each of the  following are necessary:
    *Upgrade the S-series to 8.42.04.x – released August 2016
As of 8.41 f/w the mdi tlv's and most 802.11ac grade AP interop functional.  8.42 code has some tuning to clear all known interop problems.
    *Set lldp port tx-tlv poe ge.1.15 Allows L1 criteria communication
    *Set lldp port tx-tlv med-poe ge.1.15 Allows power value negotiation - the most recent fixes (*8.42.etc) have been in this area.
    In line with the suggestions added up to this point - but additional code level and command required. 
That should work.
Regards,
Mike