Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Manual de usuario descargar pdf (Pagina 155)

Publication 1797-6.5.3 - March 2006

Additional HART Protocol Information C-7

Universal Commands

Table C.5 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 —

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 ... 195 196

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