Emerson Fisher FIELDVUE DVC5000, Дополнение к инструкции по эксплуатации

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Instruction Manual Supplement
D103266X012
DVC5000 Digital Valve Controller
May 2018
11
Command 3: Read Dynamic Variables and Loop Current
This command is used to read the value of Loop Current and the four Dynamic Variables.
The default Dynamic Variable assignment and the Variable Units Codes are shown on page 6.
Byte Format Description
Request
Data Bytes
none
Response
Data Bytes
0­3 Float Loop Current (implied units of “mA”)
4 Byte, hex Primary Variable (PV) units code
5­8 Float Primary Variable (PV) value
9 Byte, hex Secondary Variable (SV) units code
10­13 Float Secondary Variable (SV) value
14 Byte, hex Tertiary Variable (TV) units code
15­18 Float Tertiary Variable (TV) value
19 Byte, hex Fourth Variable (FV or QV) units code
20­23 Float Fourth Variable (FV or QV) value
Code Class Description
Command­
Specific
Response
Codes
8 Warning – Value read invalid (one of the variables is out of range)
Command 14: Read Primary Variable Transducer Information
Note
The Transducer Serial Number is not applicable to the DVC5000 and is set to “0”.
Byte Format Description
Returned Value
Device Revision 2 Device Revision 3
Request
Data bytes
None
Response
Data
Bytes
0­2 UINT24 Transducer Serial Number 000000 000000
3 Enum
Transducer Limits and
Minimum Span Units
Code
39 (mA) 250 (Not Used)
4­7 Float Upper Transducer Limit 41C00000 7FA00000 (Not A Number NAN)
8­11 Float Lower Transducer Limit 00000000 7FA00000 (Not A Number NAN)
12­15 Float Minimum Span 40800000 7FA00000 (Not A Number NAN)
Code Class Description
Response
Codes
None