Hart Feature Data; Hart Variable Data Record - Siemens SIMATIC ET 200SP Manual

Appendix
A.2 HART operating data records
Byte
7
8
9+n
9+n+4
A.2.2

HART feature data

Structure of the HART feature data
Byte
0
1
2
A.2.3

HART variable data record

The AQ 4xI HART analog module supports a maximum of 4 HART variables per channel.
Provided they are supported by the connected field device, these variables are ready cyclically.
These 16 HART variables are made available as readable variables in HART variable data
record 121.
Each HART variable consists of a 4-byte real value and a quality code byte. See section "HART
variables (Page 24); "Quality code".
Structure of the HART variable data record
Byte
Channel 0
0...3
4
5...8
9
10...13
14
58
Meaning
Index of HMD Module Parameter
Start Index of Burst Buffer Area
Index of HMD Channel Parameter (Channel
n)
Index of HART Client Channel Message
Data
Meaning Comment
Byte 0 = 0x62
Bit1 = 1: "Parameter check result is given with a read response"
Bit5 = 1: "compact format is supported"
Byte 1 = 0
Max Length Da‐ = 230 (maximum length of the HART request data records)
ta Unit
Comment
= 255 (not relevant)
= 255 (not relevant)
= 131+n
= 80+(2*n)
The HART request data records cannot be
configured. Data records starting from data
record number 80 (80, 82, 84, 86) are used.
Meaning
Value
Quality code
Value
Quality code
Value
Quality code
Primary Variable (PV)
Secondary Variable (SV)
Tertiary (TV)
Analog Output Module AQ 4xI HART HF
Manual, 05/2019, A5E35098013-AA