Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
22
Command 54: Read Device Variable Information
This command is used to identify each of the Device Variables, in the range of IDs 0…10 inclusive. Responds with the
Sensor Serial Number, Sensor Range Units, Sensor Ranges, Damping Value, and Minimum Span of the selected
variable. The variable range values will be in the same units as the variable units.
Items marked by “*” are only supported in HART 7 mode.
Byte Format Description
Request Data
Bytes
0 Enum
Device Variable ID, this command is applicable to variables 010. All
others will return invalid selection
Response
Data Bytes
0 UINT8 Device Variable ID
13
Device Variable Sensor Serial Number, 24bit number
(NOT USED  always zero)
4 UINT8 Device variable units code
58 Float Device Variable Upper Range
912 Float Device Variable Lower Range
1316 Float
Device Variable Damping Value,
(NOT USED  always zero)
1720 Float Device Variable Minimum Span (NOT USED  always zero)
*21 UINT8 Device Variable Classification
*22 UINT8 Family Code (NOT USED – always 250)
*2326 Time Update period in 1/23 of a millisecond
Code Class Description
Command
Specific
Response
Codes
0 Success No CommandSpecific Errors
2 Error Invalid Selection
Device-Specific Commands
The DVC6200 field device supports devicespecific commands. However, these devicespecific commands require use
of the ValveLink software application or DD methods and cannot be utilized outside of those controlled environments.
Performance
Refer to the DVC6200 Digital Valve Controller Instruction Manual (D103605X012) and Product Bulletin 62.1:DVC6200
(D103415X012) for details on DVC6200 performance.