Meaning of "ParamP" in SFD_ProcessChannel -function (DAC: Script-block")

I don't understand the meaning of the parameter "ParamP" in
SFD_ProcessChannel -function at all. Every time the SFD_ProcessChannel
-function is called, ParamP is emty, is't it ?
Could everybody show me an example with ParamP is not empty ?
Martin Bohm
[email protected]
Diadem Help:
Syntax
SFD_ProcessChannel( ChannelNumberP, InputListV, ParamP, DataP,
ErrorP )
Parameter
Globale Parameter
ParamP
In diesem Parameter wird der Singalparameter aus der Bedienoberfläche des
Script DAC-Treibers an die Funktion übergeben (sofern dieser nicht durch andere
Funktionen des Scripts geändert wurde).

Its the value of the parameter you may enter individually for every configured channel in the Script DAC driver block in DIAdem.
The variable is not a vector variable - even though you can have several channels and different parameters.
This is because the ProcessChannels function is called once for every configured channel (and tact). ChannelNumberP shows you the index of the channel that is currently processed. So, if ChannelNumberP =1 ParamP contains the parameter of the first configured channel, if ChannelNumberP =2 ParamP contains the parameter of the second channel. (Same as with DataP).
Ingo Schumacher
Systems Engineer Sound&VibrationNational Instruments Germany

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Se description and DAC-schema in attachments !
Regards
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Message Edited by Support on 02-20-2007 01:43 PM

Hi Henrik,
Currently we have no idea why this behavior occurs like you described. That's something we have to look into. But we have a workaround. You can use a separate clock block for each DAC script block. That works fine in our tests. Attached you find your modified example. I hope it can help you.
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Message Edited by Support on 02-20-2007 01:43 PM

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Is there any way to exchange data beetwen a Mainscript (SCRIPT) with
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Background: I write a DAC-Application with some script-blocks for
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[email protected]

Because the DAC Script is executed in its own runtime environment you cannot use the DIAdem variables as in a normal VBS or a SUD.
Still, there are ways to exchange information.
First of all by an extra channel as Input (you named it)
Secondly, there are several variables you can use. Have a look at the Script DAC block. There are two fields called Parameter1 and Parameter2. And each signal you configure has a parameter of its own.
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Call DACObjOpen("Script-in1")
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On the side of the Script DAC driver VBS you cann use the paramP funtion to access the signal parameter that corresponds to the actual channel (as referenced by ChannelnumberP)
' SFD_ReadChannel
' Zweck               : Lesen eines Wertes für den Kanal "ChannelNumberP"
' ChannelNumberP      | Kanalnummer aus dem Block-Dialog
' ParamP              | Vom Anwender definierte Variable aus dem Block-Dialog
' DataP               | Variable zur Rückgabe des neuen Kanalwertes. Diese
'                     | Variable sollte zumindest auf einen gültigen Wert
'                     | initialisiert werden.
' ErrorP              | Variable zur Rückgabe einer Fehlermeldung. Wird diese
'                     | Variable gesetzt, stoppt DIAdem die Messung
Sub SFD_ReadChannel( ChannelNumberP, ParamP, DataP, ErrorP )
End Sub
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' Zweck               : Diese Prozedur wird während des Messungsstarts aufgerufen
' DeviceParam1V       | Erster Parameter, der vom Anwender im DAC-Block
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' DeviceParam2V       | Zweiter Parameter, der vom Anwender im DAC-Block
'                     | eingegeben werden kann
' ErrorP              | Variable zur Rückgabe einer Fehlermeldung. Wird diese
'                     | Variable gesetzt, stoppt DIAdem die Messung
Sub SFD_Init( DeviceParam1V, DeviceParam2V, ErrorP )
End Sub
Ingo Schumacher
Systems Engineer Sound&VibrationNational Instruments Germany

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Hello OTN,
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Meaning of "ParamP" in SFD_ProcessChannel -function (DAC: Script-block")

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