Initial a process variable of PDFSignatureAppearanceOptionSpec

I got a problem in set configuration parameters for Sign Signature Field activity. In this activity, there is a field call Apprearance Option Spec. We can not set it in literal value as we want it configurable without changing the Process. So here we use variable. We create a process variable of type PDFSignatureAppearanceOptionSpec. In SetValue activity, we try to set all the fields of this variable. But the problem is most of the fields in this variable are not trivial, they have some class type, TextDirection or AppearanceType, it is hard to set the value for those fields in XPath Builder. Do you have any idea to initial a process variable that is PDFSignatureAppearanceOptionSpec type?

Hi Pietro,
As the task is associated with the WD mapped to it, we will be able to access only the WD Interface controller context associated with it and also few other Task attributes.
Regards,
Unni

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PI Control Error Between Process Variable and Set Point

I've developed a PI program that uses measurements from a pressure transducer as the process variable to control air pressure released from a motorized valve. The program works great at lower pressures, but as the set point pressure increases the error between the process variable and set point increases. I've tried several things....adjusting the P seems to initially increase the overshoot but the process variable always settles down below the set point....tried adjusting the EGU min and max values but no real pattern develops with this. It appears as the process variable get closer to the max EGU value of 70000 pascals the error increases.
I've attached three screen shots showing the process variable curve and setpoint value. The graph of interest is the one in the upper right hand corner.
Any recommendation or advice would be appreciated.
tks, Terry
Attachments:
Low Pressure.JPG ‏267 KB
High Pressure.JPG ‏398 KB
Mid Pressure.JPG ‏266 KB

Kyle,
First off....I appreciate your comments. No...there is no value is system represented as U16.
Actually errors start to develop quite a bit before the maximum. If you look at the mid pressure.jpg file you'll notice that the set point (~28125 Pascals) and process variable (~25625 Pascals) are roughly off by about 2500 Pascals. Then if you look at the high pressure.jpg file you'll notice that the set point (~53000 Pascals) and process variable (~45500 Pascals) are roughly off by about 7500 Pascals. Therefore it appears as the setpoint pressure increases towards maximum the error tends to increase.
I was curious about something....the set point value I'm inputting into the PID.VI , shown in the high pressure.jpg file, is from EGU to percent.VI. It would look exactly like the EGU to percent VI feeding the process variable input of the PID.VI with the set point value feeding the EGU to percent.VI input. Would I be better off feeding the actual set point value to the PID.VI input instead of percentage?
Thanks, Terry

Process variable string into filename at Save service

Hello,
Does anyone know how to put a string into the Pathname Pattern (Template) property of a Save service (FileUtilsService - Write Document) ?
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Hi Greg
You've done a great job getting this done with xpath.
It looks to me like you've done everything right - what's not working - are you getting an exception, or is the file being saved with the wrong name?
There is a nice little DateFormatter component here, that might make things a little easier/flexible.
http://avoka.dnsalias.com/confluence/display/Public/Formatter+DSC
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How to get value of process variable in another flex form

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Solutions:
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Unable to access process variable value in the DXFA file

Hi,
I am using the On-Demand-Assembly solution accelerator to stitch forms. I am trying to access a process variable inside the dxfa file.
This is the syntax i used: <c:forEach var="templateItem" items="${requestScope.paramsMap.templateList}"> The templateList value is not being fetched. The same code works fine if I hard code the items.
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Vidya Kesavan,
Just a shot in the dark here, but I think you may have a typo in "requestScropt.paramsMap.templateList" where "paramsMap" should be "paramsmap" in the context of the CSC template. That could be the cause, making it impossible for ODA to find the variable you're referencing. (I believe it's "paramsmap" within the CSC regardless of what name you have the Parameter Map process variable.)
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HUman Task and process variable

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Can you tell me
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Thanx in advance

Hi Experts,
Can you tell me
1)how to aceess the value of process variable
2) calculate total number of human task assocciated with a process using API's in worklist.
I am using BPM 11g,JDeveloper 11g
Thanx in advance

Scope of the BPM Process variables

Hi All,
What is the scope of the process variables in a BPM Process?
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Hi Tulasi. Check for the Modeling and Implementation Guide for Oracle Business Process Management
You can downlod it from here:
download.oracle.com/docs/cd/E21764_01/doc.1111/e15176.pdf
Chapter *8 Handling Information in Your Process Design *, particulary section *8.12 Scope and Access*

Get a process variable's value to set a task's time constraints

Hi,
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Hi Pietro,
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Process Instance : Update Process Variables with Java API

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Could you place your logic in an executeScript service?
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How do I manipulate process variables within sql?

Hi,
I am working with Oracle 10gR2.
my main problem is to indicate a problem within the execution of a SQLPLUS.
I saw in this forum that there is a bug and the return code will be ignored.
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Hi Daniel,
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when initiating a process, e.g. a Life & Work Process, i get an error at step 4 of the Process initiating road map. "Process could not be initiated: Set user context". The roles assignment should be ok. Any ideas what could be the problem?
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Markus

Hi Markus,
You need to assign the default roles to the processes. Check this link for the details: http://help.sap.com/saphelp_erp2005/helpdata/en/43/9f2d87c0a86756e10000000a11466f/frameset.htm
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Get the Process Instance as a process variable

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Does it work if the process instance is already created?
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Querying Oracle BPM database for processes with a process variable criterio

Dear gurua,
what data base user (maybe DEV_SOAINFRA???) and which tables should I join so that I select all processes with have a process variable with a specific value?

I found the following web site that can help. The password for everything is welcome1
http://blogs.oracle.com/bpm/2010/06/bpm_11gr1_now_available_on_ama.html

Change form of output signal without initializing new process of output signal

Hello!
How to change form of output signal produced on the output channel without initializing new process of output signal?
Thanks
Message Edited by _Pavel_ on 10-28-2009 05:21 PM
Solved!
Go to Solution.

I'm working with LabView 8.5.1.
I have periodic TTL impulse with constant frequency – signal to start , which I'm used to start data acquisition (PCI-6251)and generation signal (PCI-6221).
When TTL signal a detection, necessary generation some analog signal (PCI-6221) and acquisition other analog signal (PCI-6251). Then wait following TTL signal.
At this moment I write the part of the program which is responsible for data acquisition. Function retriggering (In examples C:\ProgramFiles\National Instruments\LabVIEW8.5\examples\DAQmx\Synchronization\Multi-Function.llb\Multi-Function-CtrRetrigg Pulse Train Generation for AI Sample Clock.vi) is used. This function necessary,because we start data acquisition each time on arrival TTL impulse, andrepeated creation of the virtual channel of data acquisition with the newtrigger spend a lot of time.
The problem consists in the following. Generation of the data from other card should occur on the same impulse TTL as for the data acquisition card and then generation zero value.
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Explanation of PID process variable and set point timing and optimization

Hello I've been a longtime viewer and fan of the NI discussions forums and finally have a question worthy of the expertise.
Recently I've been trying to tackle to PID loop control system. I've been able to tune a system and create a crude but functional simulation. Unfortunately I feel I'm missing some of the crucial rules of the PID loop. For example I've heard people say that the process variable need to run faster than the setpoint, and if this is so then how do you have the PID in a loop that is running slower than the process variable actually utilize the faster updating of the feedback. I've research the dt function and the timming of loops but have yet to been able to grasp how this actually works. I understand that the process variable needs to run faster than the setpoint, so would this require just slowing down the set point and keeping the PID loop, feedback, and motor control in a faster loop. That's the way I seem to be understanding it, but people mention the dt function all the time in order to tune timings. I'm interesting learning how exactly and all the ways the control system on the PID loop is actually optimized. Any help would be greatly appreciated.
Thanks
Taylor S. Amarel
Learning is living.
Co-Founder and CEO of http://3dprintingmodel.com/
"If we did all the things we are capable of, we would literally astound ourselves."
-Thomas Edison

Hi Taylor,
Can you link me to where you were reading this previously about setpoint speed and all this?
Generally, you simply stick the PID.vi into a loop and wire things up as you would expect. You can use timed loops as you discussed and can sync them up to other clocks (perhaps even a DAQ clock) if you so desire, but it's not critical.
Is there some strange behavior you're seeing that you're trying to alleviate?
Jeff | LabVIEW Software Engineer

Initial a process variable of PDFSignatureAppearanceOptionSpec

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