ECExpression Examples

The following table represents some common examples of ECExpressions that are supported in PlantSight:

ECExpression	Type of Expression	Example
GetRelatedInstance	this.GetRelatedInstance	`this.GetRelatedInstance("PLANT_AREA_HAS_NAMED_ITEM:1:PLANT_AREA").NAME`
GetRelatedInstance	Nested GetRelatedInstance	`this.GetRelatedInstance("SEGMENT_HAS_PIPING_COMPONENT:1:PIPING_NETWORK_SEGMENT").GetRelatedInstance("PIPELINE_HAS_SEGMENT:1:PIPING_NETWORK_SYSTEM").PLANT_AREA` Note: Piping Network Segment should be created from OPPID to define tags in Data Manager.
System.String	System.String.Substring	`System.String.Substring(this.DESCRIPTION,0,3)`
	System.String.Format	`System.String.Format("{0:D3}", this.DRY_WEIGHT)`
	System.String.Compare	`System.String.Compare("HEIGHT", "LENGTH")`
IIF statements	IFF Statements	`IIF(this.FLOW_RATE=0,this.MAXIMUM_PRESSURE,this.FLOW_RATE)`
IIF statements	Nested IIF Statements	`IIF(this.FLOW_RATE=0,this.MAXIMUM_PRESSURE,IIF(this.FLOW_RATE=10,this.MAXIMUM_PRESSURE,this.FLOW_RATE))`
Mathematical expressions	/,*,+.-	`(this.ELEVATION + this.DRY_WEIGHT)` Note: All mathematical expressions should be enclosed in parentheses "( )"
Expression applied on properties other than Name	Expression applied on ALIAS Property	`this.DESCRIPTION`

For more information about ECExpressions and the Expression Editor, see"Expression Editor" OpenPlant Project Administrator Help.

Note:

The ClassName defined in the schema should be in all capital letters.

For example PLANT_AREA or DEVICE_TYPE_CODE.
Combo box is visible only if the this.GetRelatedInstance is used to define the ECExpression.

For example; this.GetRelatedInstance("PLANT_AREA_HAS_NAMED_ITEM:1:PLANT_AREA").NAME & "-" & this.DEVICE_TYPE_CODE & "-" & this.NUMBER

Combo box allows you to select the pre-defined tags.
If the ECExpression does not contain this.GetRelatedInstance
For example; this.PLANT_AREA & "-" & this.DEVICE_TYPE_CODE & "-" & this.NUMBER, combo box will not be visible and a warning message is given upon saving the tag.