Field Devices With Hart Revision 7 And Higher - Siemens SIMATIC ET 200SP HA Equipment Manual

HART function
7.4 Tags
Description
The quality code of field devices with HART revision 5 and 6 is structured as follows:
Quality code
80
H
78
H
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.
7.4.4.2

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).
48
Meaning (process status)
Value is okay
Value is uncertain
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 system
Also applies when the following bits
are set in the 2nd status byte of the
HART response frame:
• Configuration changed
• Startup (cold start)
• Fixed analog output current setting
Also applies when the following bits
are set in the 2nd status byte of the
HART response frame:
• Additional status information avail‐
able
• Analog output current saturated
• Secondary variable outside the lim‐
its
• Primary variable outside the range
Request from field device refused
After module start-up, after incorrect
operation of the multiHART interface
or after redundancy failover to the
standby channel
1
AI 4xI 2-/4-wire HART ISOL HA
Equipment Manual, 07/2022, A5E50101523-AB