Instruction manual

Model 5100-02-IT Combustible Gas Sensor Module
Page: 36
HART PROTOCOL MENU
HART (Highway Addressable Remote Transducer) Protocol is the global standard for sending and receiving
digital information across analog wires between smart devices and control or monitoring system. HART is a
bi-directional communication protocol that provides data access between intelligent field instruments and host
systems. A host can be any software application from technician's hand-held device or laptop to a plant's
process control, asset management, safety or other system using any control platform. The HART protocol
used on this gas sensor module has been developed to comply fully with the HART specifications outlined by
the HART Communication Foundation (HCF).
If the HART interface board has been provided with the gas sensor module, then HART will operate via the 4-
20 mA interface automatically. While no specific handheld device is necessary for HART operation, the gas
sensor module does comply with the HART standard so any handheld or PC-based HCF certified tool will
work.
The information below provides the operator instructions on connecting HART and the HART Protocol Menu.
CommonPracticeCommands
ThefollowingCommonPracticecommandsareimplemented.
Command
Number
ByteNumber Description
38 N/A ResetConfigurationChangedFlag
48 0 ReturnsModuleStatus
ModuleState‐InCalibration(0x10),
(0x30=calpassed)
(0x50=calfailed)
ModuleState‐Trouble(0x08)
ModuleState‐Warming(0x04)
ModuleState‐RUN(ALARM)(0x02)
ModuleState‐RUN(0x01)
48 1 ReturnsAlarmRelayStatus
0x01=AlarmRelayON
0x02=WarningRelayON
0x03=BothRelaysON
48 2 ReturnsTroubleStatus(non‐zerovalueindicatesTrouble)
48 3 Returnsmaximumgasvalue
48 4 Returnsgasvalueusedduringcalibration
48 5 ReturnsIT‐SeriesModelNumber
0x28=5100‐IT‐28

DeviceSpecificCommands
TheDeviceSpecificcommandsareusedforaccessingtheuniquefeaturesofthe5100‐ITSeriesofgassensor
modules.

Aresponsecodeof0indicatesSUCCESS.Thisappliestoallcommands.AsperHARTspecification,allcommand
responseswillhavearesponsecodeandstatusbyte,
plusanycommandspecificdatabytesasindicatedinthe
followingtables.
