Rockwell Automation Publication 1718-UM001A-EN-E - December 2019
45
Additional HART Protocol Information
Appendix C
Note that this Device Variable Status byte is a new HART feature in HART
protocol revision 6 and many HART devices do not yet support it. For those
devices, the module creates a status value based on the communication status of
the device.
If the PV, SV, TV, FV are being collected without communication errors, the
value is set to 16#C0, indicating Good, Not Limited. Otherwise, the value is set
to 0, indicating Bad, Not Limited, no specific information available.
24
18
00011000
00
Bad
01
Low Limited
1
Yes
000
0
25
19
00011001
00
Bad
01
Low Limited
1
Yes
001
1
26
1A
00011010
00
Bad
01
Low Limited
1
Yes
010
2
27
1B
00011011
00
Bad
01
Low Limited
1
Yes
011
3
28
1C
00011100
00
Bad
01
Low Limited
1
Yes
100
4
29
1D
00011101
00
Bad
01
Low Limited
1
Yes
101
5
30
1E
00011110
00
Bad
01
Low Limited
1
Yes
110
6
31
1F
00011111
00
Bad
01
Low Limited
1
Yes
111
7
32
20
00100000
00
Bad
10
High Limited
0
No
000
0
33
21
00100001
00
Bad
10
High Limited
0
No
001
1
34
22
00100010
00
Bad
10
High Limited
0
No
010
2
35
23
00100011
00
Bad
10
High Limited
0
No
011
3
36
24
00100100
00
Bad
10
High Limited
0
No
100
4
37
25
00100101
00
Bad
10
High Limited
0
No
101
5
38
26
00100110
00
Bad
10
High Limited
0
No
110
6
39
27
00100111
00
Bad
10
High Limited
0
No
111
7
40
28
00101000
00
Bad
10
High Limited
1
Yes
000
0
41
29
00101001
00
Bad
10
High Limited
1
Yes
001
1
42
2A
00101010
00
Bad
10
High Limited
1
Yes
010
2
43
2B
00101011
00
Bad
10
High Limited
1
Yes
011
3
44
2C
00101100
00
Bad
10
High Limited
1
Yes
100
4
45
2D
00101101
00
Bad
10
High Limited
1
Yes
101
5
Table 5 - HART PV, SV, TV, and FV Status Values