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HART Communications
4.1 Universal HART Commands
F US Clamp-on Communications Protocol Manual
40
Hardware Installation Manual, 11/2015, A5E34981613-AC
Table 4- 9
Command 9 - Read Device Variable with Status
Description
Byte
Format
Comments/Value
Extended Field Device Status
0
Bits
<refer to common table 17>
Slot 0: Device Variable Code
1
U-8
246 <Primary Variable>
Slot 0: Device Variable Classification
2
Enum
0-not classified
Slot 0: Device Variable Units Code
3
Enum
< write units CMD 35 or 44>
Slot 0: Device Variable Value
4-7
Float
Slot 0: Device Variable Status
8
Bits
<Device Status Common Table>
Slot 1: Device Variable Code
9
U-8
247 <Secondary Variable>
Slot 1: Device Variable Classification
10
Enum
0-not classified
Slot 1: Device Variable Units Code
11
Enum
<select SV Units CMD 161>
Slot 1: Device Variable Value
12-15
Float
Slot 1: Device Variable Status
16
Bits
<Device Status Common Table>
Slot 2: Device Variable Code
17
U-8
248 <Tertiary Variable>
Slot 2: Device Variable Classification
18
Enum
0-not classified
Slot 2: Device Variable Units Code
19
Enum
<select TV Units CMD 163>
Slot 2: Device Variable Value
20-23
Float
Slot 2: Device Variable Status
24
Bits
<Device Status Common Table>
Slot 3: Device Variable Code
25
U-8
249 <Quaternary Variable>
Slot 3: Device Variable Classification
26
Enum
0-not classified
Slot 3: Device Variable Units Code
27
Enum
<select QV Units CMD 165>
Slot 3: Device Variable Value
28-31
Float
Slot 3: Device Variable Status
32
Bits
<Device Status Common Table>
Slot 0 data time stamp
33-36
Time
Table 4- 10 Command 11 - Read Unique identifier Associated with Tag
Description
Byte
Response Comments/Value
“254”
0
FE
Device Type
1-2
2A04
Siemens FUS
Minimum number of Preambles
3
5
HART Protocol Major Revision Number
4
7
Device Revision Level
5
Software Revision Level
6
Hardware Revision Level
7
<5 most significant bits>
Physical Signaling Code
7
0
<3 least significant bits>
A5E31571875A
Flags
8
See Common table 11
Device ID
9-11
<unique ID for each >
Minimum number of preambles
12
Maximum number of Device Variables
13
Configuration Change Counter
14-15
<increments with each write>
Extended Field Device Status
16
See Common table 17
Manufacturer Identification Code
17-18
002A
Siemens
Private Label Distribution Code
19-20
002A
Siemens
Device Profile
21
01
Process Automation Device