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"HART group fault display" coding
Bit number
0
1
2
3
4...7
"HART protocol error during response" coding
HART proto‐
col error dur‐
ing re‐
sponse
0
1
2
3
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA
Meaning
More status information avail‐
able
HART communication error
Parameter check
Reserved
HART protocol error during re‐
sponse
Meaning
Unspecified error
HMD error
Channel fault
Command error
HART operating data records
A.3 HART request and response data records
Explanation
(2nd HART status byte) You obtain more status informa‐
tion, if required, with HART command 48.
The field device has detected a communication error
when receiving the command. The error information is
in the first HART status byte
0: HMD parameters unchanged
1: Check HMD parameters
Always 0
0: Unspecified error
1: HMD error
2: Channel fault
3: Command error
4: Query error
5: Response error
6: Query rejected
7: Profile query rejected
8: Manufacturer-specific query rejected
9 - 15: Not used
Explanation
Always 0
0: Not specified
1: Internal communication error
2: Parameter assignment error
3: HW fault
4: Wait time expired
5: HART timer expired
6...127: Reserved
128...255: Manufacturer-specific
0: Not specified
1: Line fault
2: Short-circuit
3: Open line
4: Low current output
5: Parameter assignment error
6...127: Reserved
128...255: Manufacturer-specific
0-127: HART protocol,
Bit 7 = Always 0
99
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