PmaData - Deatiled object description
See: The
PmaData object
The variables defined on the "
Data" tab can be accessed from a script, for example the access to the first variable (zero-based index) named "
Aerial":
or
or
or
#vars identifier:
In the
PmaData object, the
#vars identifier is used to enable variables (of the
PmVar type) defined on the "
Data" tab. This identifier can be used e.g. in the
Pm method, or in the "
PP - Data binding to Pma object property" data binding. For example the method
Pm("data1/#vars/aaa") returns the data item
aaa from the object named "
data1" of the
PmaData type.
Identifier #ext:
References to
Data extensions objects in the
PmVar variable can also be done directly by extending the path of the
Pm method using the
#ext identifier.
This can be used in the
Pm method or in PP binding
in the application and
in panels.
For example the method
pMe.
Pm("/data/#vars/Temperature/#ext/al") returns the data extension with
al identifier (
ExtAlarmAnalog) in the "Temperature" variable (
PmVar) in the
data object (
PmaData object).
Various operations can be performed over variables in the
PmaData object.. For example:
- Offering values (for read and write) into the
Web by means of the
XML format. The client requiring data from this Web component is of the
PmDataClient type from the licence point of view.
- Every variable of this object can be extended by other functionality (see
Data extensions), for example for connection to alarms,
OPC or
DDE communication, etc.
- Saving to the value of the
String type by the
SaveToString method.
- etc.