Field Communicator Pc Connections - Emerson Rosemount OCX8800A Manual

Using HART communications
®
December 2022
2. Plug the load resistor into the loop connectors (located on the rear panel of
5.3

Field Communicator PC connections

There is an option to interface the Field Communicator with a personal computer.
Load the Easy Upgrade Programming Utility software into the PC. Then link the
Field Communicator to the PC through the IRDA interface. Refer to the proper
Field Communicator documentation in regard to the PC interface operation.
5.3.1 Off-line and on-line operations
You can operate the Field Communicator either off-line or on-line.
Off-line operations are those in which the Field Communicator is not connected to
the Rosemount OCX8800. Off-line operations can include interfacing the Field
Communicator with a PC. (Refer to applicable documentation regarding HART
applications).
In the on-line mode, the Field Communicator is connected to the oxygen 4-20 mA
analog output signal line. The Field Communicator is connected in parallel to the
transmitter or in parallel to the 250 ohm load resistor.
The opening menu displayed on the LCD is different for on-line and off-line
operations. When powering up a disconnected (off-line) Field Communicator, the
LCD displays the Main Menu. When powering up a connected (on-line) Field
Communicator, the LCD displays the On-line Menu. Refer to the Field
Communicator manual for detailed menu information.
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the Field Communicator).
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