Understanding System Editing and OPCs - Intergraph Smart P&ID - Help - Intergraph

Intergraph Smart P&ID Help

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Smart P&ID Version
9 (2019)
Smart Engineering Manager Version
10 (2019)
SmartSketch Version
10.0(2018)

An OPC can be placed as a freestanding item in a drawing or it can be placed onto an existing process line or signal line (line). If an OPC has been placed as a freestanding item, a line can be attached to it. When the relationship between the OPC and the line is created (either by placing the OPC or by placing the line), the system finds the applicable rules, copies the specified properties and evaluates the consistency criteria.

When the first OPC (of an OPC pair) is connected to a line, there is no line connected to the mate OPC. Because there is no other line, the system will not find any applicable rules.

When the second OPC (of an OPC pair) is connected to a line, however, the system will find the rules that apply to this pair of lines. The system copies the specified properties from the line in the other drawing to the line in the active drawing. This copy operation will not overwrite any existing values. (The Copy is forced into the Copy If Null mode.) The properties that are copied across the OPC are propagated into the active drawing. This can mean that property values on items other than the connected line are affected. However, this is only done if the current value is Null. Existing values are not overwritten. After the copy process is complete, the consistency criteria are evaluated and inconsistencies are generated for all inconsistent properties.

Each time a drawing is opened, a routine is executed to update all of the OPCs in that drawing.  Also, the relationship between the OPC and the connected line is updated. During this update, the rule base is searched to find all of the applicable rules. If the mate OPC has been connected to a new line since the last time this drawing was opened, it might find a different set of rules that apply. After finding the applicable rules, the consistency criteria are evaluated and inconsistencies are generated for all inconsistent properties. Property values are not automatically copied across OPCs during this processing. If you want to copy changed property values across OPCs, you can use the Solutions that are available in the Consistency Check dialog.

The text in the label on the OPC is also updated. If the mate OPC has been placed into a different drawing since the last time this drawing was opened, this change will be reflected in the updated label.