A handheld communicator wirelessly interfaces or communicates with
individual devices in a process control system, such as field devices,
controllers, etc., to wirelessly perform monitoring, maintenance,
configuration and control activities with respect to those devices. The
wireless handheld communicator includes a housing adapted for handheld
operation, a processing unit disposed within the housing, a computer
readable memory disposed within the housing and coupled to the processing
unit and a display, a keypad and a radio frequency transceiver. The
handheld communicator may be adapted to communicate with a host system to
receive information needed to communicate with various field devices in
the process plant and may then be used to wirelessly communicate with
each of the various field devices directly while in close proximity to
the field devices to perform monitoring and configuration activities with
respect to the field devices. Thereafter, information obtained from the
field devices may be wirelessly communicated to the host system or to a
repository, such as a data historian or a configuration database.