Promotic

Object ExtTrend

Description:
An extension of the PmVar variable of the PmaData object for connection to the PmaTrendGroup object.
Properties and methods:
ColorColor of displayed variable
DisplayNameName of displayed variable
ExtIdData extension identifier
GroupReturns the PmaTrendGroup object
MaxMaximum value of the variable
MinMinimum value of the variable
TrendIdTrend identifier and variable (column) name in the trend database table
UnitPhysical unit of the variable
VarReturns the PmVar object
Configuration windows:
ExtTrendData extension configuration
Note:
This data extension registers itself automatically into the PmaTrendGroup object after starting the application. Therefore it is forbidden to create the requested item on the "PmaTrendGroup > Data" tab! The corresponding variable for trend may be created directly in the PmaTrendGroup object as a PmVar object, or it can be registered as a data extension (ExtTrend).
If all items for the PmaTrendGroup object are of the "Data extension" type, then the "PmaTrendGroup > Data" tab may remain empty. If there are both types of items present in the PmaTrendGroup object, then in the database table the PmVar type items will be entered first followed by the "Data extension" items.

Format of saving the data extension in the form of a text string:
The content of complete of data extension (all configurators) can be saved in the form of single text string. See Format of saving the data extension in the form of a text string.
Id={Trend;PmaObject;Order;Name;Min;Max;Unit;Color;DisplayName;Sensitivity;Params;ValueType;Bit}
- Id: see the "Data extension identifier" configurator
- PmaObject: see the "Target object (PmaTrendGroup)" configurator
- Order: see the "Order" configurator
- Name: see the "Trend identifier" configurator
- Min: see the "Minimum" configurator
- Max: see the "Maximum" configurator
- Unit: see the "Unit" configurator
- Color: see the "Color" configurator
- DisplayName: see the "Name for displaying" configurator
- Sensitivity: see the "Dead band" configurator
- Params: see the "Additional parameters" configurator
- ValueType: see the "Value type" configurator
- Bit: see the "Specifies the bit number to test" configurator

History:
Pm8.03.02: Generalization for possibility to trend just a selected bit in a value (see the "Value type" configurator).
Pm8.03.00: Created
PROMOTIC 9.0.21 SCADA system documentation - MICROSYS, spol. s r.o.

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