Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 118)

Publication 1794-UM065B-EN-E - September 2010
106 Additional HART Protocol Information
Universal Commands
Universal Commands
Command Data in Command Data in Reply
# Function Byte Data Type Byte Data Type
0 Read unique identifier — None — 0 254 (expansion) —
1 Manufacturer identification code
2
Manufacturer device type code
(1)
3 Number of preambles required
4 Universal command revision
5 Device-specific command revision
6 Software revision
7 Hardware revision
8
Device function flags
(2) (H)
9…11 Device ID number (B)
1 Read primary variable — — — 0 PV units code —
1…4 Primary variable (F)
2 Read current and
percent of range — None — 0…3 Current (mA) (F)
4…7 Primary variable
3 Read current and four
(predefined) dynamic
variables — None — 0…3 Current (mA) —
4 PV units code
5…8 Primary variable
9 SV units code
10…13
Secondary variable (3)
14 TV units code
15…18 Third variable
19 FV units code
20…23 Fourth variable
6 Write polling address 0 Polling address — — As in command —