Has anyone used the "Logix5000 Controllers as Masters or Slaves on Modbus" application solution from Rockewell (Publication CIG-AP129A-EN-P)? It is slightly confusing in that it tells you it ONLY supports Modbus RTU, but then the user protocol is ONLY ASCII. I just want to make sure this is going to work. It is a heck of a lot cheaper then adding a Prosoft card.