Add and Edit Connections

Use the following steps to add or edit a connection.

To add or edit a connection

1. In the Name box, type a name for the connection (16 characters maximum).

2. In the Description box, you can optionally type text describing the connection (120 characters maximum).

3. In the Preact box, you can optionally type a value.

   Preact is a value that is equal to the difference between the target quantity (preset) and the actual quantity (actual) that is delivered when material is transferred through a connection. Many times, there is dribble or free fall of product in the connection when a transfer occurs. This results in overflow. The preact defines the anticipated overflow; that is, the difference between the target and the actual. The preact value is used only in transfer phases.

   The control system phase logic must include appropriate logic in anticipation of receiving a preact during the processing of a recipe. Also, the batch control system does not make any automatic adjustments to the preact value. Any calculations and adjustments that are to be made to the preact must be done at the control system level. This is explained further in the section associated with automatic transfer phases.