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Data extension configuration: ExtAlarmBinary

Description:
Data extension configuration ExtAlarmBinary - An extension for alarm the value of the Boolean type
Configuration items:
Data extension identifierSystem text (without spaces and diacritics). It is used for unambiguous identification of data extension in data item (e.g. for Extension property).

The default value is "al".

Target object (PmaAlarmGroup)Path to the target object of appropriate type, in which the data item must be registered. The object can also be selected by the button on the right.

Macro expression can be used for input, the result must be a NON-LOCALIZED path to Pma object (it is evaluated after starting the application).

Alarm templateThe unique text identifier of an alarm of Template type (see "Template for dynamically created items" configurator), whose configuration is used.
Automatically generated alarm identifierIf checked, then the alarm identifier will be created automatically by the system (_autoN).
Alarm identifierManually enetered alarm identifier.

This configurator sets the initial value of the property PmAlarmItem.Id.

Alarm sourceThe text specifies the logical placement of an alarm in the technology. It has the same meaning as "Source" configurator for standalone configured alarms/events.

Macro expression can be used for input ($.text ..) (it is evaluated while the window is opening). Caution: Macro expression $vb cannot be used for input.

Alarm description defined here (otherwise from template)If checked, then the alarm description is entered in the following configurator. Otherwise the template alarm description is used.
Alarm description (desc)

Macro expression can be used for input ($.text ..) (it is evaluated while the window is opening). Caution: Macro expression $vb cannot be used for input.

Value typeMethod for obtaining value for evaluation (testing):
0 - whole value - The whole value is used.Non zero value causes activation, zero value causes deactivation.
1 - defined bit - Value of specified bit is used.Non zero value causes activation, zero value causes deactivation.
3 - JavaScript expression - Value defined by JavaScript expression is used.Non zero value causes activation, zero value causes deactivation.
Specifies the bit number to testIf "3 - JavaScript expression" is set, then serves for specifying the particular bit index. The particular bit is identified by the order, so the lowest bit is numbered 0.
JavaScript expressionIf "3 - JavaScript expression" is set, then it serves for definition of the JavaScript expression itself. The JavaScript expression can have two parameters:
pVal: The value of PmVar.Value variable for simple usage in the expression.
pDE: Reference to data extension object (for obtaining other values from data extension or from variable).
Activate alarm on low value (negate test)If checked, then the result of tested value will be understood the other way round, i.e. zero value causes activation and zero value causes deactivation.
Note:
This configuration window can be opened from the "Data extensions" configurator in the variable of the PmaData object.

History:
Pm8.03.14: "Value type" configurator now has option "3 - JavaScript expression" added. This allows for example triggering an alarm when the value is higher than defined constant, trend the Quality of the variable etc. (for ExtAlarmBinary, ExtEvent, ExtTrend).
Pm7.03.00: Created
PROMOTIC 9.0.4 SCADA system documentation - MICROSYS, spol. s r.o.

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