Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
17
Command 33: Read Device Variables
This command is used to read the value of up to four selected Device Variables.
The Device Variables and Variable Units Codes are listed on page 6 and 7.
Byte Format Description Allowable choices
Request
Data Bytes
0 Variable ID Variable assigned to slot #0 See Device Variable on page 6
1 Variable ID Variable assigned to slot #1 See Device Variable on page 6
2 Variable ID Variable assigned to slot #2 See Device Variable on page 6
3 Variable ID Variable assigned to slot #3 See Device Variable on page 6
Response
Data Bytes
0 Variable ID Variable assigned to slot #0
1 Byte, hex Slot #0 Variable units code
25 Float Slot #0 Variable value
6 Variable ID Variable assigned to slot #1
7 Byte, hex Slot #1 Variable units code
811 Float Slot #1 Variable value
12 Variable ID Variable assigned to slot #2
13 Byte, hex Slot #2 Variable units code
1417 Float Slot #2 Variable value
18 Variable ID Variable assigned to slot #3
19 Byte, hex Slot #3 Variable units code
2023 Float Slot #3 Variable value
Code Class Description
Command
Specific
Response
Codes
0 Success No CommandSpecific Errors
2 Error Invalid selection – Invalid Variable ID