Quality code Meaning (process status)
84
H
Response code RC8: Update error
24
H
Response code RC16: Access restricted Request from eld device refused
23
H
Communication error or HART variable not
present in the eld device
37
H
Initialization value from analog module After module startup or after redun‐
dancy failover to the standby channel
1
00
H
Initialization value from S7 system
1
A channel is in standby mode when a redundancy failover occurs due to a fault in an IO-redundant
module.
8.4.4.2 Field devices with HART revision 7 and higher
Denition
The quality code is formed from the 1st status byte (HART device status) and the "Device variable
status" (DVS) of the response frames (HART command 9).
Description
The quality code of eld devices with HART revision 7 or higher is structured as follows:
Quality code Meaning (process status)
80
H
Value is okay
89
H
"Good" with "low limit" Process status, formed from the "De‐
vice variable status" (DVS) of the re‐
sponse frames with corresponding lim‐
its (see above).
8A
H
"Good" with "high limit"
28
H…
2B
H
"Bad"
68
H…
6B
H
"Poor accuracy"
78
H…
7B
H
"Manual" or "Fixed"
(manually controlled or xed value)
88
H…
8B
H
"More device variable state available"
(additional status information available)
84
H
Response code RC8: Update error
24
H
Response code RC16: Access restricted Request from eld device refused
23
H
Communication error or HART variable not
present in the eld device
37
H
Initialization value from analog module After module startup or after redun‐
dancy failover to the standby channel
1
40
H
Read alternatively via command 3
00
H
Initialization value from S7 system
1
A channel is in standby mode when a redundancy failover occurs due to a fault in an IO-redundant
module.
HART function
8.4 Tags
F-AI 8xI 2-/4-wire HART HA
88 Equipment Manual, 09/2021, A5E50557845-AA