Instruction Manual

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Chapter 7: HART Channel Configuration, Data, and Status 81

Table 7.9 (Response When Device Information Is Available)

HART Get Device Information - reply packet structure

Field Value Definition

Unconnected Message Header

HART Channel Number 0x00 – 0x07 (1 byte) Module input channel number for

HART command

Status 00 = SUCCESS Command status

Count (1 byte) Number of data bytes to following.

HARTManufacturerIDCode (1 byte) CMD#0, Byte 1

HARTDeviceTypeCode (1 byte) CMD#0, Byte 2

HARTPreambles (1 byte) CMD#0, Byte 3

HARTUnivCmdCode (1 byte) CMD#0, Byte 4

HARTTransSpecRev (1 byte) CMD#0, Byte 5

HARTSoftwareRevision (1 byte) CMD#0, Byte 6

HARTHardwareRevision (1 byte) CMD#0, Byte 7

HARTFlags (1 byte) CMD#0, Byte 8

HARTDeviceID (3 bytes) Device serial number CMD#0, Bytes 9-11

HARTTag (8 bytes unpacked ASCII) CMD#13, Bytes 0-5

HARTDescriptor (16 bytes unpacked ASCII) CMD#13, Bytes 6-17

HARTDate (3 bytes) CMD#13, Bytes 18-20

HARTFinalAssemblyNumber (3 bytes) CMD#16, Bytes 0-2

HARTMessage (32 bytes unpacked ASCII) CMD#12, Bytes 0-23

HARTPVCode (1 byte) CMD#50, Bytes 0

HARTSVCode (1 byte) CMD#50, Bytes 1

HARTTVCode (1 byte) CMD#50, Bytes 2

HARTFVCode (1 byte) CMD#50, Bytes 3

HARTPVUnits (1 byte) CMD#3, Byte 4

HARTSVUnits (1 byte) CMD#3, Byte 9

0 if not present

HARTTVUnits (1 byte) CMD#3, Byte 14

0 if not present

HARTFVUnits (1 byte) CMD#3, Byte 19

0 if not present

HARTPVLowerRange (4 bytes – Floating Point Value) CMD#15, Bytes 3-6

HARTPVUpperRange (4 bytes – Floating Point Value) CMD#15, Bytes 7-10

The command status, the second byte in the reply packet for the module

specific command, can return three different responses, SUCCESS,

RUNNING and DEAD. These responses echo the state of the module at

the time the command is sent. The conditions for each response are as

follows:

SUCCESS will be sent back when all of the following conditions are

met:

• Command and HART Channel number are both valid.

• HART channel device information is available.

RUNNING will be sent back when all of the following conditions

are met: