Yamatake Corporation Overview-First Time Users Only
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 1-3
1-3 : Smart Field Communicator
About SFC communications
The portable, battery-powered SFC serves as the common communication interface
device for Yamateke’s family of Smartline Transmitters. It communicates with a
transmitter through serial digital signals over the 4 to 20 mA 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 1-2 shows a simplified view of the communication interface provided by an
SFC.
Figure 1-2 Typical SFC Communication Interface.
Purpose of SFC
The SFC allows you to adjust transmitter values, or diagnose potential problems from
a remote location such as the control room. You can use the SFC to
• Configure: Define and enter the transmitter’s operating parameters including
- range values,
- output conformity,
- damping time,
- tag number (ID), and more
• Monitor: Read the input pressure to the transmitter in engineering units and the
transmitter’s output in percent.
• Display: Retrieve and display data from the transmitter or SFC memory.
• Change Mode of Operation: Tell transmitter to operate in either its analog (4-
20mA) mode or its digital enhanced (DE) mode.
• Check Current Output: Use the transmitter to supply the output current desired for
verifying analog loop operation, troubleshooting, or calibrating
other components in the analog loop.
Request
Response
4 to 20 mA line
Power
Supply an
Receiver
SFC
ST 3000
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