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1/99 SMV 3000 Transmitter User’s Manual 7
1.5 Smart Field Communicator (SFC)
About SFC
Communications
The portable, battery-powered SFC serves as the common communication
interface device for Honeywell’s family of Smartline Transmitters. It
communicates with a transmitter through serial digital signals over the 4 to
20 milliampere line used to power the transmitter. A request/response
format is the basis for the communication operation. The transmitter’s
microprocessor receives a communication signal from the SFC, identifies
the request, and sends a response message.
Figure 5 shows a simplified view of the communication interface provided
by an SFC.
Figure 5 Typical SFC Communication Interface
SFC
Response
4 to 20 mA line
Request
SMV 3000
Power
Supply and
Receiver
ATTENTION
Because of the advanced capabilities built-in to the SMV 3000, we do not
recommend that you use the SFC to configure the SMV transmitter. Some
of the SMV’s advance functions are not supported by the SFC. Although
you can use the SFC to perform certain operations, such as calibrate or re-
range the transmitter, read transmitter status and diagnose faults.
Using the SFC with
the SMV 3000
If you use the SFC to communicate with the SMV, you can adjust
transmitter values, or diagnose potential problems from a remote location
such as the control room. You can use the SFC to:
• Monitor: Read the input pressure, process temperature, or
secondary variable to the transmitter in engineering
units.
• Display: Retrieve and display data from the transmitter or SFC
memory.
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