A portable computer for use in interfacing to a process control system
having a host system includes a housing adapted for hand-held operation, a
processing unit disposed within the housing and a computer readable memory
disposed within the housing and coupled to the processing unit. The
portable computer also includes a display, a keypad and a radio frequency
transceiver adapted to communicate with the host system, all of which are
disposed within the housing and communicatively coupled to the processing
unit. A first software routine stored in the computer readable memory
processes a user input received from the keypad and sends a command to the
host system via the radio frequency transceiver. Additionally, a second
software routine stored in the computer readable memory receives process
information sent from the host system in response to the command and
displays the received process information via the portable computer
display.
