Installation, Operation and Maintenance Manual
MDE 254 Rev. 1 March 2021
HART Command Set 21
Section 8: HART Command Set
8.1.10 Command #12: Read Message
This command reads the Message contained within the field device.
Table 35. Request Data Bytes
8.1.11 Command #13: Read Tag, Descriptor, Date
This command reads the Tag, Descriptor and Date contained within the field device. Only Tag is read
by this command. Tag and Long Tag are completely separate data items.
Table 38. Request Data Bytes
Table 36. Response Data Bytes
Table 39. Response Data Bytes
Byte Format Description
None
Byte Format Description
None
Byte Format Description
0 - 23 Packed Message
Byte Format Description
0 - 5 Packed Tag
6 - 17 Packed Descriptor
18 - 20 Date Date Code
Table 37. Command-Specific Response Codes
Code Class Description
0 Success No Command-Specific Errors
1 - 15 Undefined
16 Error Access Restricted
17 - 31 Undefined
32 Error Busy
33 - 127 Undefined
Code Class Description
0 Success No Command-Specific Errors
1 - 15 Undefined
16 Error Access Restricted
17 - 31 Undefined
32 Error Busy
33 - 127 Undefined
Table 40. Command-Specific Response Codes
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