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