Emerson FIELDVUEDVC2000 Instrukcja Obsługi Pobierz pdf (Strona 10)

Instruction Manual Supplement

D103783X012

DVC2000 Digital Valve Controller

August 2014

Command 1: Read Primary Variable

This command reads the value of the DVC2000’s Primary Variable, which is Analog Input (loop current). The units are

either

“mA” or “%” as configured in the device by Command 44.

Byte Format Description

Request

Data Bytes

none

Response

Data B

tes

0 Byte, hex Primary Variable Unit Code, either 39 (mA) or 57(%)

14 Float Primary Variable value

Code Class Description

Command

Specific

Response

Codes

none

Command 2: Read Primary Variable and Percent of Range

This command reads the value of the DVC2000’s loop current in implied units of “mA” (regardless of the configured

setting by Command #44) and the measured Valve Travel in implied units of “%”.

Byte Format Description

Request

Data Bytes

none

Response

Data B

tes

03 Float Loop Current

47 Float Valve Travel

Code Class Description

Command

Specific

Response

Codes

none

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

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Emerson FIELDVUEDVC2000 Instrukcja Obsługi Strona 10