Event-driven data logging

I want to save the data from the DAQ - Card just in case a pre-defined event (measured Value out of tolerance) occured. In that case, I want to have a File with Data 1 min before the event und 1 Minute after the event.
I tried to find examples, but I coud not find anything.
Thanks for your help
Marcel Jahn

Hi Marcel:
What you need to do is collect your data in a recirculating buffer at least two minutes long...and then have it DUMP everything UNLESS there's an interesting event. Obviously, there's no way to know ahead of time when something interesting is going to happen, so this is the standard way of performing this function. Look at the Buffered Data acquisition examples. You will have to modify them to the length of buffering you need.
Hope this helps a bit.
Eric
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705

Similar Messages

Using event risen to log data into citadel

Hi all,
I have an HMI application in LV & DS 8 reads My OPC items, and log data, alarms and events into citadel. Knowing Citadel is event-driven, I want to use this event to distinguish a change in database and update my Historical Alarm & Even List in the HMI front panel instead of ever polling the database.
I really appreciate any help.

Can you post more information on what you are doing? I haven't done much with Citadel but I thought that it is aimed at logging data as it changes, i.e. all of the data logged in there will be different else it wouldn't have been logged in the first place?!
There are block diagram functions that allow you to read the traces back and this is all you need. Check out the examples that come with the DSC module.
Let me know if I can help you further.

Periodic reading data with event driven programming

Hi all
I want to read data from a device periodically, for example every 2 seconds.
but I want to use event driven programming in order to response user events.
now I don't know how to do this......!!
maybe I should use timed loop or timed sequence structure
if I use this structures, should I use then inside the while loop or outside the while loop( I mean the while loop that contains the event cases)?
please help me and accept my thanks....

You ned to run these in two separate loops. Look at the Producer/Consumer template. Put a two second time-out on the Dequeue Element and you have a loop that will run every two seconds. The loop should also handle information from the event structure.
Separate loops is the best way of handling this.
Rob

Dumping the data to XML file (Event driven )

Hi ,
Can anybody help me on this requirement .
Whenever there is an updation or change in the HR Master data like insertion of new personnel number or deletion of personnel number then I need to dump the data to XML file . That means I need to make it event driven.
Will it be possible programmatically ?
Please give me your inputs.
Best Regards
Bhagat.

Hi Bhagat,
isn't it possible to use change pointers for this?
Then in partner profile use an XML file port and it should be done!
Probably this blog could help you:
<a href="/people/stefan.grube/blog/2006/09/18/collecting-idocs-without-using-bpm">Collecting IDocs without using BPM</a>, have a look at the part where it explains how to write Idoc as XML.
Hope it helps,
Kind Regards,
Sergio

New version of the LabHSM Toolkit for Complex Event-Driven Development is Now Available!

A new version of the unique toolkit is now available for download. As announced earlier, LabHSM makes it possible to easily create and then maintain complex event-driven applications in LabVIEW as a collection of HSM-driven active object VIs using a higher level of abstraction and agile software development methodologies. These active object VIs are created based on a universal Hierarchical State Machine ( HSM or statechart ) template. Therefore, all your code looks similar regardless of its functionality!
So, what’s new in version 1.1?
• "No hands" block diagram modifications! Version 1.1 actually creates, renames, and removes actions on the block diagram as you define, rename, and remove them in the editor! (No, it can't fill in all the details for you, but it can do some, if you think ahead, by replicating similar actions.)
• Two new screens, Events Usage and Actions Usage, (available in licensed copies only) clearly show where (in which state(s)/transition(s)) and how (is it an entry action, exit action or event handling action?) a particular event or action is used. Moreover, if after selecting an instance on the list, the Go To button is pressed, it makes the main screen jump to respective location in the HSM structure. In the case of Actions Usage screen, the respective action is also displayed on the block diagram. Thus, these screens provide two more different cross-sections of the HSM data set and two additional ways to navigate it – now along the Actions and Events dimensions too instead of just the state tree in the first version.
• Version 1.1 can duplicate events or actions, which helps when you've got several that are similar. Changes in the events and actions lists are reflected immediately on the main screen and on the block diagram (which solves the previous problem of deleting a renamed event or action when it's still in use).
• The Events and Actions List Editors are no longer modal and neither are the Events and Actions Usage screens, so you can have all the panels and the block diagram visible and move freely among them as you build your HSM (a good argument for an even larger monitor).
• When you save an HSM file, version 1.1 automatically adds the .hsm extension if you leave it out and it remembers the last directory you used.
• The Loaded VIs utility now can open and close block diagrams (if they are not protected with a password) and display only VIs with modal front panels, if desired—useful for quickly finding and closing accidentally opened (e.g., from the hierarchy window) modal VIs. Make a modal version of this utility and keep it on the Desktop for this purpose.
• A new example of a simple hierarchical state machine and two more excellent tutorials from Paul F. Sullivan (SULLutions.com) are included into the package. The tutorials are also available online. The overview article has also been extended.
As before, the LabHSM toolkit is available for UNLIMITED PERIOD trial. Please visit http://www.labhsm.com for details and download. The site also contains references which you may want to check to learn more about hierarchical state machines and active object computing.
Stanislav Rumega
NI Certified LabVIEW Developer
H View Labs
http://www.labhsm.com
[email protected]
US Toll-Free Phone/Fax: 877-570-8684

I am not really sure if Azure support this but its worth to make your configuration file to support .NET 4.0
$PShome\PowerShell_ISE.CONFIG and $PSHOME\PowerShell.exe.config will be not existing.
So you can make an entry in configuration to support .NET framework 4.0
like shown below
$config_text = @"
<?xml version="1.0"?>
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0.30319"/>
<supportedRuntime version="v2.0.50727"/>
</startup>
</configuration>
$config_text| Out-File $pshome\powershell.exe.config
$config_text| Out-File $pshome\powershell_ise.exe.config
Close PowerShell Console and open as administrator.
Try loading the modules back and let me know.
Regards Chen V [MCTS SharePoint 2010]

New LabHSM Toolkit - Agile development of complex event-driven maintainable LabVIEW applications with active objects / actors based on a universal Hierarchical State Machine / statechart template.

Dear Fellow LabVIEW programmers:
Most of the systems you deal with are reactive. It means that their
primary function is constant interaction with their environment by
sending and receiving events. But most likely, they can have something
happening inside them too, even when they are not processing messages
received from outside. So, such systems have to continuosly react to
external and internal stimuli. Right? Moreover, most likely, they
consist of subsystems that are reactive too and, in turn, can have
their own "life", to an extent independent from other parts (with
which they still communicate, of course). Reactive (event-driven)
systems are more naturally modeled with active objects. So, why then
should we try to model and code them with GOOP and its passive
("dead"!) objects?
"Flat" State Machines have been known for decades to have severe
limitations. It's been more than 20 years since Dr. Harel invented
Hierarchical State Machines (statecharts) to fight those limitations.
Then why does NI still tout the same old good Moore FSM as the
ultimate tool for event-driven programming in LabVIEW in its $995
State Diagram KIt?
The LabHSM toolkit we are happy to present, makes it possible to
easily create and then maintain complex event-driven applications in
LabVIEW as a collection of HSM-driven active object VIs using a higher
level of abstraction and agile software development methodologies.
These active object VIs are created based on a universal Hierarchical
State Machine ( HSM or statechart ) template. So. all your code looks
similar regardless of its functionality!
We all love just jump to code, right? However, to be good boys, we
need to do design first. Then implement it in code. If the logic is
modified we need to redo the design first and then redo the code. When
using LabHSM where behavior information is abstracted into a separate
HSM data file editable with a supplied editor, there is no need for
coding separate from design any more. The modified behavior becomes
code automatically as soon as the HSM file is saved. Design is code!
The implementation basically follows Dr. Samek's Quantum Programming
paradigm. (see http://www.quantum-leaps.com). However, as already
mentioned, LabHSM stores the behavior information in a file separate
from the code itself. It also adds state dependent priorities to
events, a separate queue for public events/messages, and, of course,
some LabVIEW specific code like capturing front panel user events and
putting them into the private Events queue. Communication and
instantiation functions are also rather specific for LabVIEW.
It is available for UNLIMITED PERIOD trial. Please visit
http://www.labhsm.com for details and download. The site also contains
references which you may want to check to learn more about
hierarchical state machines and active object computing.
Since this is our debut we will appreciate any comments and
suggestions. Our contact information is available on our site, of
course.
Have a G'day!

Symtx is currently hiring the following position. Please contact me if interested.
Amy Cable
Symtx, HR
[email protected]
Symtx, the leading supplier of functional test equipment, hires the brightest & most talented engineering professionals to design & manufacture complex custom electronic systems for advanced technology leaders in the defense, aerospace, communications, medical, transportation & semiconductor industries. Symtx’ challenging & dynamic work environment seeks to fill openings with highly qualified electronic engineering design professionals.The ideal candidate will be responsible for defining the requirements, software design and code development, and integration of test control software for custom functional test systems. Candidate should be familiar with data acquisition concepts, instrument control, complex test, measurement and calibration algorithm development and definition and implementation of control interfaces to hardware. Prefer familiarity with instrument control via GPIB, VXI, MXI, RS-232 desirable. Requires BS/MSEE and 3 -7+ yrs of experience in one or several of the following test applications in a Windows NT/2000/XP environment using Labwindows CVI, TestStand, Labview, Visual Basic, C++ and knowledge of RF systems is a plus. Job responsibilities will include software design, development, integration, team leadership, and interfacing with customers( includes PDR’s & CDR’s).

Failed to query Alarms & Events, alarms not logging

Hi all,
I've recently run in to an issue with the DSC Alarm & Event logging. I have a number of shared variable libraries all setup to log both data and alarms to Citadel. I've double checked that the library itself is configured for logging data and alarms, as well as all the variables. Using the DSM, I can see all of the active alarms in the system across all libraries, and can receive all alarm change events programmatically.
For some reason, alarms for only one of the libraries are logging, and attempting to query the historical Alarms & Events through MAX throws an error roughly 14 out of 15 times (with no error code or indication of why it fails). I've also attempted to archive the Citadel database, with it failing with an unspecified error (presumably when archiving the alarms side of things, the data archive seemed to work).
Can anyone offer some insight on how to resolve the problem, preferably without data loss? Further, how can I prevent the issue in future?
Solved!
Go to Solution.

Thanks for your reply Joey.
Libraries are being deployed using the DSC Deploy Libraries VI. The libraries also have data and alarm logging enabled programmatically. At the moment they're both being logged to the same database.
I can't find the "Read Historical Trend.vi" through the DSC Examples. The article was written in 2005 and I'm using DSC 2012 SP1, so I don't know if things have changed since then. I can view the data through MAX without issue if that's any consolation.
The mdf file is about 60MB, with the entire Citadel database at around 6GB.
The Citadel service is definitely running. I've also attempted restarting it (and the PC itself) but the issue is still present.
It's entirely possible there was a power failure, as this has been during a period of plant commissioning. When I can query the alarms through MAX there's a lot of data up to a certain point (end July), then it's very sporadic after that with only certain variable's alarms being logged.
I attempted another database archive and this time it managed to get all the way through, though the archived database also has the same problems querying alarms and events. So at this point I suspect the mdf/mds files are corrupt in some way.
Using the DSM, I've tried manually pointing the libraries to log alarms to a newly created database but this doesn't seem to work. No alarms or events are logged to the new database, and checking the library properties shows that the alarm database which I configured the library to log to had reverted to the original database. Am I missing something obvious here? Do I need to pre-create some traces in the new database before alarms and events will get logged there?
Given I have managed to make a 'good' archive of the database, I'd like to try just deleting the alarms and events portion of the database and start clean. Is there a correct way to do this? I did find this article, but am unsure if this will work with a potentially corrupted database: http://digital.ni.com/public.nsf/allkb/9D3A81218264C68686256DE1005D794F If I stop all of the Citadel and SQLServer related services, can I simply delete the mdf/mds files?

Problem in Event driven report

Dear Gurus...I created the following procedure to implement Event Driven Reporting:
CREATE OR REPLACE procedure ABC.eve_drv_rep as
myPlist system.SRW_PARAMLIST;
myIdent system.SRW.Job_Ident;
BEGIN
myPlist := system.SRW_PARAMLIST(system.SRW_PARAMETER('',''));
system.srw.add_parameter(myPlist,'GATEWAY','http://192.168.1.133/reports/rwservlet);
system.srw.add_parameter(myPlist,'SERVER','rep_appsrv_frhome1');
system.srw.add_parameter(myPlist,'REPORT','y:\02\02\Gry_02_01.rep');
system.srw.add_parameter(myPlist,'USERID','def/xyz@nml');
system.srw.add_parameter(myPlist,'DESTYPE','email');
system.srw.add_parameter(myPlist,'DESFORMAT','PDF');
system.srw.add_parameter(myPlist,'DESNAME','[email protected]');
myIdent := system.srw.run_report(myPlist);
EXCEPTION
when others then
raise_application_error(-20001,'Error sending email.Error: '||sqlerrm);
--Dbms_Put.Put_Line('Error sending email.Error: '||dbms_util.get_detailed_sqlerrm);
END;
Procedure is created successfully but when I execute this procedure, I get the following error:
ORA-20001'Error sending email.Error: ORA-20999
ORA-06512: at "Nml.Eve_Drv_Rep", line 17
ORA-06512: at line 1
Can u guess where is the problem?
2ndly I want to know that whether I should give IP address or Application Server Machine Name in GATEWAY parameter?
And in SERVER parameter either I should give the Application Server Machine Name or Report Server name installed on Application Server Machine?
Lastly from where I can get the complete list of Parameters to be added in SRW.Add_Parameter like SERVER, GATEWAY etc.
Please note that we r using Database 10g Rel.2 and Forms and Reports services on Application Services and the report being called was developed in Reports 10g.

Hi,
Consider this corrected code.
REPORT zztest
NO STANDARD PAGE HEADING
LINE-COUNT 36(3)
LINE-SIZE 250.
DATA: BEGIN OF itab OCCURS 0,
carrid TYPE sbook-carrid,
connid TYPE sbook-connid,
fldate TYPE sbook-fldate,
custtype TYPE sbook-custtype,
class TYPE sbook-class,
bookid TYPE sbook-bookid,
END OF itab.
DATA a TYPE i.
SELECT carrid connid fldate custtype class bookid
FROM sbook INTO CORRESPONDING FIELDS OF TABLE itab.
SORT itab.
ULINE.
WRITE :1 'CARRID', 20'BOOK ID', 37'CLASS'.
ULINE.
LOOP AT itab .
 AT NEW carrid.
 WRITE: 1 itab-carrid.
ENDAT.
WRITE : 20 itab-bookid.
WRITE : 40 itab-class.
AT END OF carrid.
 ULINE.
ENDAT.
ENDLOOP.
Your problem was.
AT NEW carrid.
 WRITE: 1 itab-carrid.
ENDAT.
WRITE : /20 itab-bookid. "New Line /
WRITE : 40 itab-class.
Regards,
Arun Sambargi.

Plc data logging using Labview

I am trying to communicate with PACSystem RX3i using Labview in order to log
data from PLC. Is this possible?
If it is possible, how could I implement it?

Hi mber,
Thanks for posting at NI forums. I looked into the supported device & driver plug-in list for NI OPC Servers, and the PACSystem RX3i is supported. To configure the OPC server to communicate with this PLC, you can follow the steps given in this article. In the LabVIEW side, you can configure an I/O server as an OPC client to communicate with the server.
In order to configure the I/O server you will require the Datalogging and Supervisory Control (DSC) module installed for LabVIEW. In the article I just referenced, it shows how to configure bound variables to communicate with the PLC tags to retrieve data. The DSC module installs a Citadel database, so when you are configuring the bound variable, you can choose to log data depending on events, alarms or a historical log. This article describes the data logging options using the DSC module. You can also choose to read and display the data in a VI by dragging the bound variables to the block diagram and then log to a file using logging functions.
Best Regards,
Alina M
Applications Engineering
National Instruments

Run Code Continuously in Event Driven State Machine

Hi there, I was wondering what is the best way to run code continuously in an event driven state machine. Particularly, I am going off the JKI state machine. At the moment I put the code I want to run continuously (acquire from an instrument) in the timeout case of the event structure. When the user presses the button, the event sends the value 0 to the timeout terminal of the event structure (through a shift register). If the user stops the acquisition then the value -1 is sent to the timeout terminal. This is a tip that I took from an article by Mike Porter.
Would it be better to run this process in a separate loop? Is a state machine a bad design choice for running code continuously? I don't like my current solution because if I have another process I'll have to start putting case structures into the timeout case. Also, if the process takes a while then the event structure will take a while to respond.
Thanks for your input!

AKA_TG wrote:
Adding to that I believe Preview Queue element to read the data and Lossy enqueue to transfer the I/O output, especially if the I/O device responds slowly. This should keep your event structure polling along very nicely during I/O calls to the other structure.
I actually prefer to use an User Event to send the data to the main event structure and/or whoever else needs it. I am not a fan of the lossy enqueue (loss of data). At that point, I might as well just use a Notifier and/or global variable.

Now on LINUX too: LabHSM, the toolkit for agile and complex event-driven development

We are happy to announce that, thanks to the efforts of Mr. German Schumacher, LabHSM is now available to the Linux users too. If you are a LabVIEW for Linux user, please feel free to download LabHSM from the respective page of our site: http://labhsm.com/download.htm
About LabHSM: LabHSM is a professionally designed toolkit that allows creating complex event-driven LabVIEW application as an easily maintainable collection of asynchronously communicating active objects ( actors ) based on a universal Hierarchical State Machine ( HSM or statechart ) template. The LabHSM toolkit enables the programmer to work on a higher level of abstraction and utilize agile software development methodologies combining design and coding in one highly flexible process.
Stanislav Rumega
NI Certified LabVIEW Developer
H View Labs

Symtx is currently hiring the following position. Please contact me if interested.
Amy Cable
Symtx, HR
[email protected]
Symtx, the leading supplier of functional test equipment, hires the brightest & most talented engineering professionals to design & manufacture complex custom electronic systems for advanced technology leaders in the defense, aerospace, communications, medical, transportation & semiconductor industries. Symtx’ challenging & dynamic work environment seeks to fill openings with highly qualified electronic engineering design professionals.The ideal candidate will be responsible for defining the requirements, software design and code development, and integration of test control software for custom functional test systems. Candidate should be familiar with data acquisition concepts, instrument control, complex test, measurement and calibration algorithm development and definition and implementation of control interfaces to hardware. Prefer familiarity with instrument control via GPIB, VXI, MXI, RS-232 desirable. Requires BS/MSEE and 3 -7+ yrs of experience in one or several of the following test applications in a Windows NT/2000/XP environment using Labwindows CVI, TestStand, Labview, Visual Basic, C++ and knowledge of RF systems is a plus. Job responsibilities will include software design, development, integration, team leadership, and interfacing with customers( includes PDR’s & CDR’s).

Version 1.1.1 of LabHSM Toolkit for Complex Event-Driven Development in LabVIEW – Small Corrections and Huge Changes in Licensing.

A new version of the unique toolkit is now available for download. As announced earlier, LabHSM makes it possible to easily create and then maintain complex event-driven applications in LabVIEW as a collection of HSM-driven active object VIs using a higher level of abstraction and agile software development methodologies. These active object VIs are created based on a universal Hierarchical State Machine ( HSM or statechart ) template. Therefore, all your code looks similar regardless of its functionality!
So, what’s new in version 1.1.1?
The code (made in LabVIEW 7.0 for Windows) now comes complete with block diagrams (password protected).
Simpler debugging code in the full template.
Extra menu items in the editor to open VIs as well as HSM files - nice to have when the LabHSM editor is the only VI open.
Copying of default actions is now implemented correctly.
No more run-time licenses! Just buy a developer's license once and distribute as many applications as you like!
The "Demo_" prefix is no longer required for VIs created in the trial version.
No more nag messages while running your HSMs!
As before, the LabHSM toolkit is available for UNLIMITED PERIOD trial. Please visit http://www.labhsm.com for details and download. The site also contains references which you may want to check to learn more about hierarchical state machines and active object computing.
Stanislav Rumega
NI Certified LabVIEW Architect
H View Labs

Symtx is currently hiring the following position. Please contact me if interested.
Amy Cable
Symtx, HR
[email protected]
Symtx, the leading supplier of functional test equipment, hires the brightest & most talented engineering professionals to design & manufacture complex custom electronic systems for advanced technology leaders in the defense, aerospace, communications, medical, transportation & semiconductor industries. Symtx’ challenging & dynamic work environment seeks to fill openings with highly qualified electronic engineering design professionals.The ideal candidate will be responsible for defining the requirements, software design and code development, and integration of test control software for custom functional test systems. Candidate should be familiar with data acquisition concepts, instrument control, complex test, measurement and calibration algorithm development and definition and implementation of control interfaces to hardware. Prefer familiarity with instrument control via GPIB, VXI, MXI, RS-232 desirable. Requires BS/MSEE and 3 -7+ yrs of experience in one or several of the following test applications in a Windows NT/2000/XP environment using Labwindows CVI, TestStand, Labview, Visual Basic, C++ and knowledge of RF systems is a plus. Job responsibilities will include software design, development, integration, team leadership, and interfacing with customers( includes PDR’s & CDR’s).

Event Driven Programming is withheld from LabVIEW Base.

Can anyone give me a good answer why? Every other programming language in the world has Event Driven Programming (EDP) built in, even free languages. So when all I wanted was to use LV as a graphical programming language, (hey, that's what the "G" in G-programming stands for) I was disappointed to find that in my undervalued LV Base I can't look for mouse movement, mouse enter, mouse leave, keyboard actions and countless other possibilities that would be standard fare in any other language, unless, I pay over 1200 dollars more for the Full development package. I know I should have read up on it more before purchasing, and understood what I would be missing out on. But how was I to know that the fundamental programming function of EDP would be considered on par with Data Acquisition and Signal Processing? So basically in order to get a complete programming language, I need to spend more than twice the cost of the Base package just to receive the last key component. And all this because the Evaluation of LV gives you near limitless possibilities, so a new LV programmer gets used to having these tools at his/her disposal, only to yank some of the most critical tools. So after saying all this, I am pleading for an explanation. Why isn't there at least some add-on module that would allow a user to install the withheld functionality of EDP to a Base Development package? Surely making money is the goal of any business, and I won't claim bait and switch here, or any other wrong doing here. But there is, in my opinion, a marketing misjudgment here.
-Orion Williams

Unfortunately to upgrade, it would cost me the difference between the base version and the full version. What I think is in order is an add-on module that will give customers the functionality of EDP, without having to also pay for signal processing, which is clearly a more robust programming tool, that I don't need. I am hoping to show NI that by withholding EDP from the base version with no upgrade option except paying for the full version, that their customers who come into LV at the base version are getting an undervalued version, and they know it, and that without at the very least, and add-on module for EDP, isolating smaller business and individuals. I agree that signal processing, data acquisition and EDP are worth an extra 1300 dollars, but I don't agree that EDP on it's own is worth an extra 1300 dollars, but that's the only option that I have at this moment. My suggestion is to create an add-on module that includes EDP and sell it for 300 dollars, since I know signal processing is a much more complex feature and is worth more of that upgrade price than EDP. Of course all versions of LV should include EDP, so if that drives the price of LV base up, so be it. Just don't let anyone else be fooled into thinking they are buying a Graphical Programming Language unless all the features of a programming language are included at all price points. Can I get a witness?

Oracle CEP and Event Driven Architecture

I am a master student and writing my thesis on adaptive enterprise. An important component in my frameworks is the ability for organisation to response to sudden and unpredictable event.
I have found that Oracle offer the CEP technology, which considered as the corners stone for its SOA suit to achieve SOA 2.0 standards.
I only have very superficial understanding of CEP technology, and would like to learn from you
1.     Has Oracle leveraged the capability of CEP for BI? Does the information from CEP feed back to BI to facilitate decision making?
a.     If so, how? Can someone send me a link which elaborates the architecture?
2.     According to the white paper, CEP is able to anticipate the future event based on existing event, how does it filter the false signal, and how accurate it might predict the future event?
3.     Does CEP have the capability to distinguish the importance of an event?
4.     Does CEP help BAM to trace back a particular transaction and identify which part of the service generates a warning signal?
5.     Has Oracle integrated the Event Driven Architecture with Enterprise Manager yet? I want to know whether Oracle SOA suit support auto orchestration and choreography based on the event identified by CEP.
Thank you very much and I am looking forward for your replies.

Just wanted to add a few additional points. OCEP is a platform for building event-driven applications that encompasses a number of things; including clustering, high-availability, distributed cache integration, monitoring, management, logging, database access, and more. A part of the platform is the event processing engine. Previously, OCEP did embed an event processing engine that was based on Esper, although a lot of custom hardening, performance, and feature enhancements were done. The Esper technology has now been replaced by Oracle's own event processing engine, although the legacy Esper engine is still supported for backward compatibility. The event processing language supported by the new engine is called CQL (Continuous Query Language).
Hope that helps.
Seth

Creating Event driven process chain

Hi all,
In my scenario there are two chains in which
1. First chain is normal chain, which we are using to
load business data.
2. Second chain will contain start variant and one ABAP
program that will call first chain and this second
chain is event driven.
So can anybody send me relevant documents or
information regarding how to create event? How to
schedule process chain using event? and also how to call
process chain using ABAP program?
Thanks & Regards
Ajinkya Deodhar

Hi,
Look into the following links:
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
Event collector:
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
Creation of Event:
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
Hope it hepls you

Event-driven data logging

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