Common­practice Commands; Supported Commands - Emerson Fisher FIELDVUE DVC5000 Instruction Manual Supplement

Instruction Manual Supplement
D103266X012
Common­Practice Commands
The DVC5000 field device supports the following common practice commands:

Supported Commands

Command 33: Read Device Variables
Command 35: Write Primary Variable Range Values
Command 38: Reset Configuration Change Flag
Command 42: Master Reset
Command 48: Read Additional Status
Command 50: Read Dynamic Variable Assignments*
Command 54: Read Device Variable Information
Command 108: Write Burst Mode Command Number*
Command 109: Burst Control Mode*
*Command 50, 108, and 109 are supported in Device Revision 3 only
Command 33: Read Device Variables
This command is used to read the value of up to four selected Device Variables.
The Device Variables and the Variable Units Code are listed on page 6.
Note: If any one of the requested variable IDs is invalid, the INVALID_SELECTION error will be returned along with no
data bytes.
Byte
0
1
Request
2
Data Bytes
3
0
1
2­5
6
7
8­11
Response
Data Bytes 12
13
14­17
18
19
20­23
Code
Command­
Specific
2
Response
Codes
Format Description
Variable ID Variable assigned to slot #0
Variable ID Variable assigned to slot #1
Variable ID Variable assigned to slot #2
Variable ID Variable assigned to slot #3
Variable ID Variable assigned to slot #0
Byte, hex Slot #0 Variable units code
Float Slot #0 Variable value
Variable ID Variable assigned to slot #1
Byte, hex Slot #1 Variable units code
Float Slot #1 Variable value
Variable ID Variable assigned to slot #2
Byte, hex Slot #2 Variable units code
Float Slot #2 Variable value
Variable ID Variable assigned to slot #3
Byte, hex Slot #3 Variable units code
Float Slot #3 Variable value
Class Description
Invalid selection – Invalid Variable ID (see note above)
DVC5000 Digital Valve Controller
Allowable choices
See Device Variables on page 6
See Device Variables on page 6
See Device Variables on page 6
See Device Variables on page 6
May 2018
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