Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
21
Command 52: Set Device Variable Zero
This command is used to force one of the pressure inputs to read 0. To use this for pressure, apply 0 psi to the sensor.
Then, send this command, specifying the affected pressure Device Variable. The offset will be adjusted to force the
present value to read 0. An error will be generated, and no change applied, if the new value causes a change of more
than about 3%.
Supported Variables:
2 = Port A Pressure
5 = Port B Pressure
8 = Supply Pressure
Byte Format Description Allowable choices
Request Data
Bytes
0 UINT8 Device Variable ID Variable IDs 2, 5, or 8
Response
Data Bytes
0 UINT8 Device Variable ID Variable IDs 2, 5, or 8
Code Class Description
Command
Specific
Response
Codes
0 Success No CommandSpecific Errors
2 Error Invalid selection – Unsupported variable ID
6 Error Insufficient Power
7 Error In Write Protect Mode
9 Error Present Value is too high
10 Error Present Value is too low
78 Error NVM Protective Mode
Command 53: Set Device Variable Units
This command is used to set the units for reporting of the device variables related to the DVC6200’s temperature or
pressure sensors. In addition to changing the units code, execution of this command will also change the device
variable’s Upper and Lower Range values to reflect the new units. Units Codes are listed on page 7.
To change the units of PV (Analog Input), variable 0, use Command 44.
Supported variables are:
1 = Temperature
2 = Port A Pressure
5 = Port B Pressure
7 = Differential Pressure
8 = Supply Pressure
Byte Format Description Allowable choices
Request Data
B
y
tes
0 UINT8 Device Variable ID Variable IDs 1, 2, 5, 7, or 8
1 UINT8 Pressure or Temperature Units Code
Response
Data B
y
tes
0 UINT8 Device Variable ID Variable IDs 1, 2, 5, 7, or 8
1 UINT8 Pressure or Temperature Units Code
Code Class Description
Command
Specific
Response
Codes
0 Success No CommandSpecific Errors
6 Error Insufficient Power
7 Error In Write Protect Mode
11 Error Invalid Variable ID
12 Error Invalid Units Code for the Variable ID provided
78 Error NVM Protective Mode