Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
20
Command 50: Read Dynamic Variable Assignments
This command returns a list of four device variable codes, taken from the Device Variables table on page 6, which are
returned in Command 3. These Dynamic Variables are specified via Command 51.
Byte Format Description
Request
Data Bytes
None
Response
Data Bytes
0 UINT8 ID of variable returned as the first variable (PV) in Command 3
1 UINT8 ID of variable returned as the second variable (SV) in Command 3
2 UINT8 ID of variable returned as the third variable (TV) in Command 3
3 UINT8 ID of variable returned as the fourth variable (FV) in Command 3
Code Class Description
Command
Specific
Response
Codes
None
Command 51: Write Dynamic Variable Assignments
This command assigns Device Variables to the Secondary (SV), Tertiary (TV), and Quaternary (QV) Dynamic Variables
as returned in Command 3. Note that the Primary Variable (PV) is constrained to be only variable 0 (Analog Input). The
variables in SV, TV, and QV can be any Device Variable 0…10 which includes Analog Input, Temperature, all pressure
readings, Travel, or Travel Setpoint.
This command is accepted when in service, and is afforded write protection.
Byte Format Description
Request Data
Bytes
0 UINT8 Device variable ID assigned to PV (must be variable 0 only)
1 UINT8 Device variable ID assigned to SV (010 inclusive)
2 UINT8 Device variable ID assigned to TV (010 inclusive)
3 UINT8 Device variable ID assigned to QV (010 inclusive)
Response
Data Bytes
0 UINT8 Device variable ID assigned to PV
1 UINT8 Device variable ID assigned to SV
2 UINT8 Device variable ID assigned to TV
3 UINT8 Device variable ID assigned to QV
Code Class Description
Command
Specific
Response
Codes
0 Success No CommandSpecific Errors
2 Error Invalid selection (Slot #0 is not 0) or other slots not 0…10.
6 Error Insufficient Power
7 Error In Write Protect Mode
16 Error Access Restricted  other master has access locked.
78 Error NVM Protective Mode