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onDataReceive - event of object PmaOpcClientGroup

Description:
The event is triggered after the data receipt from the OPC server.

The calling procedure of this event depends on the setup of the ""onDataReceive" event" configurator. It is recommended to use the "A = call the event for all registered variables (in this object and also in other PmaData objects)" setting.

Parameters:
pMe(Object) Reference to the PmaOpcClientGroup object where the event rises.
pEvent(Object) Reference to object describing detailed information about the specific event.
pEvent.Items - (Array) The property is set only if the ""onDataReceive" event" configurator is set to:
- "A = call the event for all registered variables (in this object and also in other PmaData objects)".

Then each item of this array represents the "data extension ExtOpcClient object" of the variable that is defined either in this PmaOpcClientGroup object or in another PmaData object.

- "B = calling for the whole group of received variables - only for variables defined in this object (obsolete)".

Then each item of this array represents the "variable PmVar object" that is defined in this PmaOpcClientGroup. Variables in other PmaData objects (that have the ExtOpcClient data extension) are not processed here.

In both cases, if for example 10 data items are simultaneously received from the OPC server then the event is triggered only once and there are these 10 items in this array.

pEvent.VarName - (String) Data item name. The property is set only if the ""onDataReceive" event" configurator is set to "C = calling for each variable separately - only for variables defined in this object (obsolete)".

For example if 10 data items are received from the OPC server, then the event is triggered for each item of the array and the name of the item is in pEvent.VarName.

pEvent.Reason - (Long) Reason of the receipt.
0 - Receipt from the automatic update (only if the "Update from server at server change" configurator is checked).
1 - After calling the Read method.
2 - After calling the Refresh method.
Note:
Calling this event can also be emulated in the INFO system when this object is being viewed and the "Actions" button is pressed. See "PmaRoot > Permissions > InfoEdit" permission.
Example:
The ""onDataReceive" event" configurator is set to "A = call the event for all registered variables (in this object and also in other PmaData objects)".

We will report following information about the received data items into the Debug_info item of the INFO system:

JavaScriptVBScriptSelect and copy to clipboard

var i;
var aItems = pEvent.Items;
var nItems = aItems.GetSize(1);
Pm.Debug("OPC onDataReceive: Size=" + nItems + ", Reason=" + pEvent.Reason);

for (i = 0; i < nItems; i++)
{
Pm.Debug("Name=" + aItems.GetItem(i).Var.Name);
Pm.Debug("Value=" + aItems.GetItem(i).Var.Value);
Pm.Debug("Quality=" + aItems.GetItem(i).Var.Quality);
Pm.Debug("ItemId=" + aItems.GetItem(i).ItemId);
}
PROMOTIC 9.0.6 SCADA system documentation - MICROSYS, spol. s r.o.

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