Introduction Of Hart Communication Protocol; Hart Commands; Command 0:Read Transmitter Unique Identifier; Command 1: Read Primary Variable Value (Pv) - Bell VFM60 Series User Introduction Manual

44 9D 1E 3F（total flow in float＝1256.94）
5A
91

7 Introduction of HART communication protocol

7.1 HART commands

7.1.1 Command 0:Read transmitter unique identifier

Command formate
Return to the expension device type code, version number and identification number
Request: None
Response:
Byte 0:
Byte 1:
Byte 2:
Byte 3:
Byte 4:
Byte 5:
Byte 6:
Byte 7:
Byte 8:
Byte 9-11:
Test of command
Send 0 command:FF FF FF FF FF 02 80 00 00 82; to request information of the instrument
Receive 0 command:FF FF FF FF FF 06 80 00 0E 00 00 FE 1A 1A 05 05 00 00 00 00 AD 18 8C
4F

7.1.2 Command 1: Read primary variable value (PV)

Command formate:
Return to primary variable value in float.
Request:None
Response:
Byte 0:
Byte 1-4:
Date:24/04/2020
(CRCL)
(CRCH)
254
Manufacture's ID
Manufacture's device type
Number of request preambles
Revision level of universal command
Revision level of transmitter document
Software revision level
Hardware revision level
Flags, none defined at this time
Device Indentification Number
Primary variable unit code
Primary variable
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