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ST 700 Series HART/DE Option User’s Manual
Revision 4.0
14 Communication Modes for
ST 700 Basic Transmitter
14.1 Overview
The ST700 Basic SmartLine Pressure Transmitter can be configured over HART (version 7)
communication for operation. This manual addresses the processes to configure and calibrate a
Transmitter for HART communication.
14.2 HART Mode Communication
When using MCT404/202,before connecting to a HART transmitter, verify that the FDC
application is used and not the MC Toolkit application. When you use the MC Toolkit
application, the MCT404/202 is set for DE communications, where the current amplitude can
bump
process variables in either point-to-point or in the multi-drop mode in HART.
Transmitters with HART capability have features that vary among manufacturers and with the
characteristics of specific devices. The FDC software application executing on the MCT404/202
supports the HART Universal, Common Practice and Device Specific Commands which are
implemented in the Honeywell Transmitters.
As indicated in Figure 18 the output of a Transmitter configured for HART protocol includes two
primary modes:
Figure 18
– HART Point-to-Point and Multi-drop Value Scaling
Point-to-Point Mode:
Where one Transmitter is connected via a two-conductor, 4-20mA
current loop to one receiver.
Multi-Drop Mode:
Where several Transmitters are connected through a two-conductor
network to a multiplexed receiver device.
Содержание SmartLine ST700
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