onBeginOfTransfer - event of the PmaCommMsg object

Description:

The event is triggered always before transmitting the Master message starts.
Is triggered right after calling the Run method. The Run method can be called in the script or automatically, if the AutoRunEnabled property is enabled.

Parameters:

pMe	(Object) Reference to the PmaCommMsg object where the event rises.
pEvent	(Object) Reference to an object describing detailed information about the specific event. The pEvent parameter is not used here because this event does not need any additional information.

Note:

The event is triggered only for Master messages (i.e. if the "Message type" configurator is set to "Master").
In this event, it is possible for example to fill the transmitted data on the "Data-sent" tab.

Example:

The transmitted data will be filled with 3 variables from the object of the PmaData type in the boiler room.

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var oData = pMe.Pm("/BoilerPlant/Data");

pMe.WriteVars("Temperature").Value = oData.Item("Temperature1").Value;

pMe.WriteVars("Power").Value = oData.Item("Power1").Value;

pMe.WriteVars("Pressure").Value = oData.Item("Pressure1").Value;