# Process Control Valve

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This additional acyclic objects are available for GD and PCD profile since firmware released end of January 2021.

131 VAT Pressure Controller

Supported Instances: 1 (1)

RW Read Write, RO Read Only, NV Non Volatile

Attr | Name | Data Type | Acc | NV | Unit | Min | Max | Def | Description
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
3 | Pressure Controller Selector | USINT | RW | NV** |  | 1 | 4 | 1 | Active Controller in Control Mode = Pressure 1:Controller 1 2:Controller 2 3:Controller 3 4:Controller 4
4 | Pressure Control Speed | REAL | RW | NV** |  | 0.001 | 1.0 | 1.0 | Speed valid in Control Mode = Pressure, 1.0 equals to full speed
5 | Target Pressure Used | REAL | RO | V | mbar* | 0.0 | SFS |  | This value is set as pressure controller input. It differs to the Target Pressure if a pressure ramp is used.
16 | Store Control Parameter Volatile | BOOL | RW | NV |  | 0 | 1 | 0 | 0:Store in NV Memory 1:Do Not Store in NV Memory
17 | Pressure Control Position Restriction Enable | BOOL | RW | NV |  | 0 | 1 | 0 | Limit the valve movement in Control Mode Pressure
18 | Minimum Control Position | REAL | RW | NV | pos* | 0.0* | 100.0* | 0.0* |
19 | Maximum Control Position | REAL | RW | NV | pos* | 0.0* | 100.0* | 100.0* |

132 VAT Pressure Control Units

Supported Instances: 4 (1..4)

Attr | Name | Data Type | Acc | NV | Unit | Min | Max | Def | Description
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
1 | Control Algorithm | USINT | RW | NV** |  | 0 | 2 | xx | 0:Adaptive 1:PI 2:Soft Pump xx Controller 1 = 0, Controller 2 and 3 = 2, Controller 4 = 3
2 | Control Direction | USINT | RW | NV** |  | 0 | 1 | xx | Used for Control Algorithm PI and Soft Pump 0:Downstream 1:Upstream xx Controller 1,2 and 4 = 0, Controller 3 = 1
16 | Learn Data Selection | USINT | RW | NV** |  | 0 | 3 | 0 | Used for Control Algorithm Adaptive 0:Bank 1 1:Bank 2 2:Bank 3 3:Bank 4
17 | Gain Factor | REAL | RW | NV** |  | 0.0001 | 100.0 | 1.0 | Used for Control Algorithm Adaptive
18 | Sensor Delay | REAL | RW | NV** | sec | 0.0 | 1.0 | 0.0 | Used for Control Algorithm Adaptive
32 | P-Gain | REAL | RW | NV** |  | 0.001 | 100.0 | 0.1 | Used for Control Algorithm PI and Soft Pump
33 | I-Gain | REAL | RW | NV** |  | 0. | 100.0 | 0.1 | Used for Control Algorithm PI and Soft Pump
48 | Ramp Enable | BOOL | RW | NV** |  | 0 | 1 | 1 | Activate/Deactivate pressure target ramp. The effective target pressure can be read in Target Pressure Used
49 | Ramp Time | REAL | RW | NV** | sec | 0.0 | 1000000.0 | 1.0 | Target reach time
50 | Ramp Slope | REAL | RW | NV** | mbar*/sec | 0.0 | SFS | 1.333224 | Limit the rate of pressure change
51 | Ramp Mode | USINT | RW | NV** |  | 0 | 1 | 0 | 0:Use Ramp Time 1:Use Ramp Slope
52 | Ramp Start Value | USINT | RW | NV** |  | 0 | 1 | 1 | 0:Previous Ramp Value 1:Actual Pressure Value
53 | Ramp Type | USINT | RW | NV** |  | 0 | 2 | 0 | 0:Linear 1:Logarithmic 2:Exponential

* Scaling: Class 49 S-Analog Sensor Object, Attribute 4 Data Unit, Pressure: Instance 1, Position: Instance 3

** In case of Store Control Parameter Volatile is 1 (true) the value will not be stored in nonvolatile memory.

*** Valve series specific