4.13       The Assistant "P&ID Freeze"

On planning plants, P&I diagrams are the key documents. After the release of these documents, both the sheets and the plant objects represented on those sheets shall be protected against changes and deletions.

By means of the P&ID Freeze assistant, you may release P&I diagrams and their contents for subsequent trades and protect (freeze) the plant objects and their related data. Using the assistant, you can also unfreeze frozen P&I diagrams and their contents. If you wish to use the assistant in a project, the permission Freeze P&I Diagram must be enabled for your user name in the Access Control of the project.

On freezing a sheet:

·            The system attribute Frozen by P&ID will be set at the sheet and at the displayed objects. Attributes with content will also receive the property Frozen by P&ID. These attributes will be displayed in blue.

·            At the sheet, the attributes P&ID Freeze by and P&ID Freeze at below the tab Common Attributes will be filled with the user's acronym and the current date.

·            A Revision and another assistant can be started at the end of the freeze process. Both the revision and the assistant can be configured via option settings.

·            A configurable subsequent dialog will be opened in which you can enter information on the status attributes of the P&I diagrams.

On unfreezing P&I diagrams, you can start an assistant and enter status information. Moreover, the aforementioned P&ID Freeze attributes will be updated.

 In this context, you can only execute assistants specifically tailored to the P&ID Freeze functionality.

The following items will be frozen:

·            Boolean attributes, either if they are set or if the property Manual Entry is set in the attribute properties.

·            All pins which belong directly to a frozen device.

·            Device and flow stream states if they are displayed directly on the sheet. However, attributes inherited from the source project will not be frozen.

·            All directly associated chemical component groups and chemical components of a frozen flow stream.

·            Shapes displayed on a frozen sheet.

·            Networks (connections) with 2 connection points on the frozen sheet.

The following is applicable to frozen sheets:

·            You can still place new items on the sheet and move protected items.

·            For frozen objects, attributes which are not protected may be edited.

·            In P&I diagrams opened in Visio, you can either highlight the shapes of frozen or of unfrozen objects in colors.

·            Attributes with the property Frozen by P&ID cannot be changed by assistants (such as Smart Datasheet, Smart Excel and Execution Management Merge). A message is displayed that protected attributes cannot be overwritten.