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General
HART (Highway Addressable Remote Transducer) is a digital com-
munication protocol that uses sine waves superimposed on the stan-
dard 4 - 20 mA current. Because the HART signal is small, and its
average value is zero it does not affect the accuracy of the analog
current signal.
HART is a master-slave communication protocol, which means that
during normal operation, each slave (field device) communication
is initiated by a master communication device. Two masters (a pri-
mary master and a secondary master) can connect to a HART loop.
The HART communication protocol is an open standard owned by
the member companies in the HART Communication Foundation
(HCF). For additional information contact:
HART Communication Foundation,
9390 Research Boulevard, Suite I-350, Austin, Texas, 8759 USA.
Internet: http://www.hartcomm.org
MC5P and HART
MC5P Multifunction Calibrator’s HART communication is a firmware
option. The HART modem required for HART communication is lo-
cated in the E module and the terminals of the E module are used
for connecting MC5P with the Hart instrument.
MC5P supports HART Revision 5. Earlier revisions are not sup-
ported.
MC5P treats the Analog Output (AO) and the Digital Output (PV,
Primary Variable) as separate instruments. To calibrate/trim both
output signals, an Analog Output instrument and a Digital Output
instrument need to be created into MC5P’s instrument database.
This can be done manually or automatically by communicating with
the HART instrument to be calibrated/trimmed.
HART Instruments and Beamex’s Calibration Database Software
Beamex’s QCAL
®
Calibration Database Software support HART
instruments as follows:
CMX Calibration Maintenance management software. All
versions.
QM6 Quality Manager starting from version 1.90/1.90a.
QD3 Quality Documenter starting from version 2.10.
General
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