HART实用命令详解.pdf
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APPENDICES
Appendix B: HART Revision 5
UNIVERSAL COMMANDS IN HART REVISION 5
Command Data in Command Data in Reply
# Function Byte Data Type Byte Data Type
0 254 (expansion)
1 Manufacturer identification code
2 Manufacturer device type code
3 Number of preambles required
4 Universal command revision
0 Read unique identifier None
5 Device-specific command revision
6 Software revision
7 Hardware revision
8 Device function flags* (H)
911 Device ID number (B)
* Bit 0 = multisensor device; Bit 1 = EEPROM control required;
Bit 2 = protocol bridge device
0 PV units code
1 Read primary variable
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