Definition of Parameter Extensions

The parameter extensions you can use are as follows.

Target Value

The Target Value extension is used by the batch control system to transfer a specific numerical value to the particular phase block that is in operation. This value is one that has been configured within the batch control system and is specific to the current recipe as well as the phase block. Generally, the Target Value parameters consist of process temperatures, timer values, and transfer quantities.

Actual Value

The Actual Value extension consists of a specific numerical value that originates within the phase block logic and is transferred to batch control system. This value corresponds with a Target Value that has been passed to the phase block from the batch control system and is usually monitored and shown in the batch control system. The values also generally consist of process temperatures, timer values, and transfer quantities. The comparisons between the Target Values and corresponding Actual Values are used to determine the completion of the respective phase block. An example of an Actual Value is the time remaining as the soak phase block is operating.

High Deviation

The High Deviation extension is a batch control system configured value that corresponds to a high tolerance limit for the Actual Value. Generally, if the Actual Value becomes greater than the High Deviation value while the phase block is in the Run state, an alarm is generated.

Low Deviation

The Low Deviation extension is a batch control system configured value that corresponds to a low tolerance limit for the Actual Values. Generally, if the Actual Value becomes less than the Low Deviation value while the phase block is in the run state, an alarm is generated.

High Limit

The High Limit extension is a batch control system configured value that corresponds to the maximum value that can be entered in the recipe for a parameter target.

Low Limit

The Low Limit extension is a batch control system configured value that corresponds to the minimum value that can be entered in the recipe for a parameter target.

Preact

The Preact extension value corresponds to the addition of bulk ingredients. The Preact is the amount of an ingredient that discharges from a source after the command has been given to stop the flow. An example of a Preact is the extra quantity of an ingredient that is being fed to a scale from a conveyor. When the desired weight is reached and the conveyor is turned off, there remains some extra quantity of the ingredient that falls from the conveyor to the scale. The quantity of this extra amount of an ingredient is called the Preact. Automatic adjustments of the Preact must be done in the control system.

Lot Code

The Lot Code extension is a batch control system configured value that corresponds to the lot code entered by the operator for an input material.

Material ID

The Material ID extension is a batch control system configured value that corresponds to the identification code of the input or output material being moved by the operator. The Material ID is assigned in the recipe, but the operator can change it.