Abstract: A process control and monitoring method for wirelessly communicating with multiple devices is disclosed. The method includes a basestation that communicates with multiple field units via a wireless messages and in accordance with a wireless protocol and multiple field units that receive wireless messages in accordance with the wireless protocol from the basestation and respond to requests from the basestation via wireless messages in accordance with the wireless protocol. The wireless protocol includes messages containing unique identifiers for confirming the authenticity of the wireless messages.

Abstract: A system for wirelessly communicating between multiple devices of a process control system is disclosed. The system includes a basestation that communicates with multiple field units via a wireless signal and in accordance with a wireless protocol. The wireless protocol is made up of frames that are defined by multiple time slots, an initial one of which is reserved for a wireless start-frame message from the basestation to multiple field units. The base station utilizes the start-frame message to assign the remaining time slots to field units and to provide information to synchronizing the field units to the basestation.