Ni pxi motion control, data extraction

hey,
i am using NI PXI Motion control system wid kollmorgen AKD servo drive. The drive has been successfully operated. But now is there any way i can extract real time values of current, speed and torque of the servo motor being controlled. And can this extracted data logged into an excel sheet??
Rishabh

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Motion control: PXI 7350 controller and UMI 7774 to interface with third-party driver UDK5114NW2

Dear community,
This is about Motion control in Labview: I try to control a step motor by using a PXI 7350 controller and UMI 7774 to interface with third-party driver UDK5114NW2. The problem is 5 Disable LEDS on UMI 7774 board always lit even when I check "enable" on "Motion I/O setting" in configuration of PXI 7350 motion controller. Furthermore, when I start to control step motor, it is not working and I found disable LED on UMI board still lit. I don't know how to solve this problem. Can someone help me to figure out? Thank you in advance!
Hau Nguyen.

Dear Community,
I said wrong, 4 disable LEDS on UMI 7774 Board instead of 5 as my previous post. Why nobody help me to solve this problem. I can not turn off disable LEDs on UMI 7774 Board so I can not start the strp motor. Please help me!
Hau Nguyen.

PXI ethernet activation requires initializing motion control?

On a PXI with multiple 7344 motion control cards and an ethernet LAN connection, ethernet does not become active (e.g., flickering LED on the PXI controller connector) until the 7344 card is initialized. Shouldn't ethernet become active as part of booting up?

The behavior is no longer reproducible, although several combinations of booting and plugging in the Ethernet cable were explored. LAN access is now available promptly upon booting or connecting the cable, as expected. A residual explanation might be that Win2K on the PXI 8175 controller did not fully respond when DHCP on the local router/firewall changed the PXI's IP address, due to changes in the network configuration. In this case, initializing the 7344 cards is taken as an event that caused the OS to complete LAN activation. Many other events with other hardware might have had the same effect.

Problem with data acquisition and motion control

I have PCI-6024E and PCI-7342 cards on a single PC. Servo motion control works fine when it goes alone or is accompanied by one point data acquisition in a while loop, but when I start data acquisition with specified sample rate, the motor moves with breaks.
Does anybody know what is the problem? Is it possible to fix it?

How are you performing your motion? Is it a position move or a velocity move? How are your triggering the data acquisition? Using breakpoints on the 7342? If so, are you using single breakpoints or modulo? How are you configuring the data acquisition rate? Are you triggering just the start to the acquisition and the unsing the daq scan clock or are you using the motion controller to send the scan clock itself?

Controlling Data source (0CO_PC_PCP_10) Extraction setup

Hi Guys,
I want use controlling data source 0CO_PC_PCP_10 for cost estimate itemization report. and the data target is 0COPC_C10. FIRST TIME I AM WORKING ON CONTROLLING SIDE , please tell me the steps how to setup the data source in R/3 side, and how to activate the data source in r/3 side
please send the steps asap , i will assign the full points.
thanks
kk

Hi KK,
Check these links if they r useful...
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/a7f2f294-0501-0010-11bb-80e0d67c3e4a
http://help.sap.com/saphelp_nw04/helpdata/en/53/c1143c26b8bc00e10000000a114084/frameset.htm
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/fb07ab90-0201-0010-c489-d527d39cc0c6
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/1910ab90-0201-0010-eea3-c4ac84080806
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/ff61152b-0301-0010-849f-839fec3771f3
Regards,
Ram.

In a RT motion and data system, what is the best variable handling structure(s)?

I built a system that applies motion control to two axes and also takes data from a third axis encoder.
The program structure is parallel timed loops (one motion control loop, one data collection loop, one host communication loop) with front panel.
This is targeted to a RT target; there is no host program.
Now I am using global variables to pass information between the loops and for exchanging information with the front panel indicators and controls. I think this is a suboptimal solution. I am considering the following changes:
1) For communicating variable values (such as commanded velocity and position) to the motion loop, I will replace the global variable structures with onboard variables in the motion card memory.
2) For saving the data collected from the third axis, I will use an RT-FIFO structure in the RT controller memory.
3) I will eliminate the front panel from the RT program and create a separate user interface program targeted to the host PC. Communication between these programs will be accomplished using the Simple TCP/IP Messaging Protocol as described in this document:
http://zone.ni.com/devzone/conceptd.nsf/webmain/0986799C984500F886256F170079411E
Global variables will be replaced with Motion onboard variables.
Before I start this chore, am I following the best practice? Any advice on improving any aspect of this plan?
My System:
Windows XP on P4 PC ethernet to
PXI-8187 RT Controller
PXI-7350 Motion Control board
(2) servo axes with quadrature feedback
(1) additional quadrature encoder used as measuring probe
I do not have a DAQ card in this system.
Thank you!
Laine

Thanks Kristi. I understand your recommendation.
Some of my variable instances are 4 or 5 SubVIs deep. For instance, the main high priority loop calls MOVE.vi which calls CALC_ANGLE.vi, which calls CALC_MOVETIME.vi which calls CALC_VELOCITY.vi which uses the variable Initial_velocity. If Initial_velocity is received from the host in the main program, passed to the high-priority loop using an RTFIFO, then bundled and kept in a shift register, what is the best way to get that information down where I need it?
Not only will I have to redeclare the RT-FIFO in each subVI, but I will also need to pass the reference value cluster down the chain as well? This sounds messy and computationally expensive to me. So my choices might be
1) Eliminate subVIs and bring everything to the top. This is a rather large program, so could make quite an extensive top vi if all code is in one place.
2) Use onboard variables to store and pass values. Are these less deterministic than RTFIFOs? What is their primary purpose if not to pass data, or are they just to be used with motion card onboard programming?
3) Use global variables, but I think these are not deterministic.
4) Bite the bullet and pass the variable cluster down through the SubVI chain. Is there an easier way to do this than what I describe above?
Have I made any bad assumptions or overcomplications?
Thanks.
Laine

Motion Control via Serial Port

I have previously developed an automated video microscope application in Labview. It worked great. My setup was: NI PXI system with 1409 image board, 7344 motion controller, 7764 breakout box, stepper motors, motor drivers, and tables. Now, a customer is requiring that we use a specific brand of drivers that encompass a motion controller and are daisy-chained together. Communication will take place from a serial port, thereby bypassing the 7344. My question is: will I have to can my entire previous Labview motion/data acquisition program b/c I won't be using the 7344 controller? Or, will it be easy to specify in the program to commmunicate via the serial port rather than the card? Would this setup take place in MAX, or in the LabView applicatio
n itself? Any nuances that I should know about? Any info would be appreciated. THANX-ROB

Rob,
in this case you won't be able to use any of your motion related code. The motion VIs in LabVIEW call the NI-Motion driver dll and thus they are not hardware independant. By the way, this is not a specific disadvantage of the NI-Motion driver. In fact there is not such a thing available like a standardized interface and hardware independant motion control language.
In general you will have to use low level serial communication (VISA). That means you have to read the drive/controller manual, identify the serial command strings you need and send them to the device.
For configuration the drive vendor should provide a utility to set the necessary parameters.
On the other hand you could be lucky in the case that the vendor of the drive/controller provides h
igh level LabVIEW vis. You should check with this vendor if a LabVIEW driver is available. Still you will have to rewrite your motion related part of the code.
I'm sorry that there are no better news.
Best regards,
Jochen
NI-Germany

BODS 3.1 : SAP R/3 data extraction -What is the difference in 2 dataflows?

Hi.
Can anyone advise as to what is the difference in using the data extraction flow for extracting Data from SAP R/3 ?
1)DF1 >> SAPR/3 (R3/Table -query transformation-dat file) >>query transformation >> target
This ABAP flow generates a ABAP program and a dat file.
We can also upload this program and run jobs as execute preloaded option on datastore.
This works fine.
2) We also can pull the SAP R/3 table directly.
DF2>>SAPR/3 table (this has a red arrow like in OHD) >> Query transformation >> target
THIS ALSO Works fine. And we are able to see the data directly into oracle.
Which can also be scheduled on a job.
BUT am unable to understand the purpose of using the different types of data extraction flows.
When to use which type of flow for data extraction.
Advantage / disadvantage - over the 2 data flows.
What we are not understanding is that :
if we can directly pull data from R/3 table directly thro a query transformation into the target table,
why use the Flow of creating a R/3 data flow,
and then do a query transformation again
and then populate the target database?
There might be some practical reasons for using these 2 different types of flows in doing the data extraction. Which I would like to understand. Can anyone advise please.
Many thanks
indu
Edited by: Indumathy Narayanan on Aug 22, 2011 3:25 PM

Hi Jeff.
Greetings. And many thanks for your response.
Generally we pull the entire SAP R/3 table thro query transformation into oracle.
For which we use R/3 data flow and the ABAP program, which we upload on the R/3 system
so as to be able to use the option of Execute preloaded - and run the jobs.
Since we do not have any control on our R/3 servers nor we have anyone on ABAP programming,
we do not do anything at the SAP R/3 level
I was doing this trial and error testing on our Worflows for our new requirement
WF 1 : which has some 15 R/3 TABLES.
For each table we have created a separate Dataflow.
And finally in between in some dataflows, wherein, the SAP tables which had lot of rows, i decided to pull it directly,
by-passing the ABAP flow.
And still the entire work flow and data extraction happens ok.
In fact i tried creating a new sample data flow and tested.
Using direct download and - and also execute preloaded.
I did not see any major difference in time taken for data extraction;
Because anyhow we pull the entire Table, then choose whatever we want to bring into oracle thro a view for our BO reporting or aggregate and then bring data as a table for Universe consumption.
Actually, I was looking at other options to avoid this ABAP generation - and the R/3 data flow because we are having problems on our dev and qa environments - giving delimiter errors. Whereas in production it works fine. Production environment is a old set up of BODS 3.1. QA and Dev are relatively new enviornments of BODS. Which is having this delimiter error.
I did not understand how to resolve it as per this post : https://cw.sdn.sap.com/cw/ideas/2596
And trying to resolve this problem, I ended up with the option of trying to pull directly the R/3 table. Without using ABAP workflow. Just by trial and error of each and every drag and drop option. Because we had to urgently do a POC and deliver the data for the entire e recruiting module of SAP.
I dont know whether i could do this direct pulling of data - for the new job which i have created,
which has 2 workflows with 15 Dataflows in each worflow.
And and push this job into production.
And also whether i could by-pass this ABAP flow and do a direct pulling of R/3 data, in all the Dataflows in the future for ANY of our SAP R/3 data extraction requirement. And this technical understanding is not clear to us as regards the difference between the 2 flows. And being new to this whole of ETL - I just wanted to know the pros and cons of this particular data extraction.
As advised I shall check the schedules for a week, and then we shall move it probably into production.
Thanks again.
Kind Regards
Indu
Edited by: Indumathy Narayanan on Aug 22, 2011 7:02 PM

SPM data extraction question: invoice data

The documentation on data extraction (Master Data for Spend Performance Management) specifies that Invoice transactions are extracted from the table BSEG (General Ledger) . On the project I'm currently working the SAP ERP team is quite worried to run queries on BSEG as it is massive.
However extract files are called BSIK and BSAK of; which seems to suggest that the invoices are in reality extracted from those accounts payable tables.
Can someone clarify the tables really used, and if it's the BSIK/BSAK tables what fields are mapped?

Hi Jan,
Few additional mitigation thoughts which may help on the way as same concerns came up during our project .
1) Sandbox Stress testing
If available u2013 take advantage of an ECC Sandbox environment for extractor prototyping and performance impact analysis. BSEG can be huge (contains all financial movements), so e.g. BI folks typically do not fancy a re-init load for reasons outlined above. Ask basis to copy a full year of all relevant transactional data (normally FI & PO data) onto the sandbox and then run the SPM extractors for a full year extraction to get an idea about extraction system impact.
Even though system sizing and parameters may differ compared to your P-box you still should get a reasonable idea and direction about system impact.
2) In a second step you may then consider to break down the data extraction (Init/Full mode for your project) into 12 monthly extracts for the full year (this gives you 12 files from which you Init your SPM system with) with significant less system impact and more control (e.g. can be scheduled over night).
3) Business Scenario
You may consider to use the Vendor related movements in BSAK/BSIK instead the massive BSEG cluster table as starting tables (and fetch/lookup BSEG details only on a need base) for the extraction process (Index advantages were outlined above already).
Considering this we managed to extract Invoice data with reasonable source system impact.
Rgrds,
Markus

Data extraction is not taking place from BW to R/3

Hi Experts,
We recently upgraded our BW 3.1 system to NW2004s/BI (BW 700). Now we are
not able to extract data from R/3 4.6C source system.
We checked and data extraction job is not getting triggered in R/3. It is
not receving Idoc.All the settings are correct in WE20 and WE21. I will appreciate your quick help.I am not sure if the question has been posted in correct forum or not as I am a newbee in SDN forum. If its not there in the correct forum,please let me know.
Many Thanks

hi Arun,
Thanks for your quick reply. and also I have made the mistakein the post subject . It is from R/3 to BW. But I checked all the ALE setings and RFC connection. Everyhthing is alright.but dont know why its not getting extracted. I think some problem might be lying with the function module. If you have any other idea apart from RFC/Delta please let me know. I am damn sure this isnot an issue with ALE config.
Just to make this issue little bit clear, the exact issue now I am facing is related to Idocs. Idocs are going to the state 56 in R/3 and all the control records are blank in R/3. This has created a nightmare. All the efforts are going in vain...
Many Thanks,
Chinmaya
Message was edited by:
Chinmaya Dash

Ho to automate data extraction from KSB1 and GR55 transaction code

Hi All,
Can you please let me know if their is a way to automate data extraction from transaction code KSB1 and GR55. I have to extract data from 5 different servers .i.e different server for each region and again i have different controlling area codes in each region. Following are the details which i use to extract the data. It takes too long for me to extract data from all this regions and controlling area codes using my parameters. It's very time consuming so i want to automate this process. I am end user so i don't have any admin rights. Please let me know any workable solution asap.
Production areas : PNA for Americas, PSI for Asia Pacific and Japan, PGY for Germany, PIT for Italy and PEU for Europe
Controlling area codes in PNA : CAR for Argentina, CBR for Brazil, CMX for Mexico and CUS for USA. Same way there so may other controlling area codes for all other production areas
Period From 1 to 12
Fiscal Year : 2009
Cost Centre Group : G_6284
Cost Element Group : 1742000000
Please let me know in case you need more details.

Hi,
Here follows a translation from German:
SAP GUI (client) for Windows enable
Start SAP Logon and log on to the SAP server.
Click the button on the toolbar to adjust for Local Layout.
Click Options and then click the tab for the scripting.
Select the Enable checkbox for scripting.
Disable the checkbox for Notify when a script is assigned to an active GUI and the checkbox for Notify when a script opens a connection.
Save the settings and restart the SAP GUI again.
SAP-server enable
With the following procedure, you can enable scripting by the SAP client temporarily. The specified value in this way is lost when you restart the server.
Start SAP Logon and log on to the SAP server.
Start a transaction RZ11.
Enter sapgui / user_scripting in the window to manage the profile parameters.
Click on ads.
Click in the window to display the profile parameter attributes to change value.
Enter TRUE in the field for a new value.
Save the settings and log out from the SAP GUI.
Quit the SAP Logon.
Note:
If the server administrator edited the application server profile of the SAP system to sapgui / user_scripting = TRUE to include the scripting is enabled when you restart the server by default.
SAP provides an option to change the network connection mode at any server. The following two connection modes are available: high-speed connection (LAN) and connecting with a slow speed. Although Functional Tester works in both modes, the high-speed connection with a recorded script is played only in this mode. This also applies to other modes. They must reflect your SAP script in the same network connection mode, with which the script was recorded. It is recommended that the mode of "high-speed connection, as it offers a greater number of valid recognition properties.
Regards,
ScriptMan
Edited by: ScriptMan on Apr 13, 2010 12:32 PM

Data extraction to 2 BW systems

Hi everyone,
We have put in a new BI 7 server and copied all the configuration from the existing BW 3.1 server. The data in BI 7 server is up-to-date till Jan 2008. The daily data extraction is still being executed in BW 3.1. We are using the Purchasing and Inventory Controlling application. My question:
1. How can I update the new BI 7 server to have the latest up-to-date data (i.e. Feb 2008 onwards)?
2. How do I configure the daily data extraction to run in both BW 3.1 and BI 7 server?
Appreciate any help on this questions. Thanks.
Regards,
Basid

Hi everyone,
We have put in a new BI 7 server and copied all the configuration from the existing BW 3.1 server. The data in BI 7 server is up-to-date till Jan 2008. The daily data extraction is still being executed in BW 3.1. We are using the Purchasing and Inventory Controlling application. My question:
1. How can I update the new BI 7 server to have the latest up-to-date data (i.e. Feb 2008 onwards)?
2. How do I configure the daily data extraction to run in both BW 3.1 and BI 7 server?
Appreciate any help on this questions. Thanks.
Regards,
Basid

Simple straight line motion control with brushless motor and encoder/microswitch

I want to go build a motion control system/program using labview. I have a brushless motor and a controller and a National instrument DAC (NI USB-6009). This is how my system looks like: receive an input signal 4-20mA, this should be converted to 0-5V for the controller for speed, controller should move motor till it hits micro switch. The micro switch/encoder should generate a signal (5V) back to shut the controller. I want to record the position of the motor in labview. How do I do this? How do I set the system up? Thank you in advance

Controller from anaheimautomation: MDC151-050301
Motor:BLWSG234D-36V-4000-R3
Controller and motor go together.
The input signal for the system will be 4-20mA. Using this signal I will correlate it to a specific voltage which will drive the speed of the motor. This will displace the lead screw linearly. I will have a microswitch that will be triggered by screw and will relay a signal to shut the motor. I want find a way to record the position of the shaft/leadscrew at that specific point. I want to identify a home position, halfway position and full length travel position. I will use 3 swiches or 1 switch in three positions to identify all these points.
My end result should be whwn I turn on the system or start the program It should detect whether it is at the home position, if not travel to home then respond accordigly given an input signal(4-20mA).
How will I program such on labview...finding all the right icons to record the data is such a mess for me since i'm a beginner.
Thanks

PWM in Motion Control

HI All,
I am facing a problem in Motion Controller.
We are using PCI 7344 and UMI 7774.
Now their is a connector on the Motion control card for Digital I/O.
In this Pin No 5 and Pin No9 are PWM1 and PWM2 respectively.Now I have used to VI PWm duty and config PWM. I am seeing the PWM waveform on CRO.But to my surprise the output is not matching the required data.
IF you go for HElp and click config PWM VI block , you can see a table given where the internal clock selected corresponds to a particular frequency in 734X and 735X.Now since I am using 7344 my frequency should match with 734X table , whereas this is not happening and
my frequency matches the table of 735X.
SO i am bit confused about the controller specs or is someor the other way Iam missing some thing more.
Regards
Manish Karnik
Cruiser Controls
Mumbai.

Manish,
please have a look at this table which comes with the NI Motion function help file for NI-Motion 7.2. This table should contain the correct values. The latest revisions of the 734x are named 7340 and the PWM output should follow this table.
Best regards,
Jochen Klier
National Instruments Germany
Message Edited by Jochen on 07-05-2006 01:34 PM
Attachments:
PWM table.jpg ‏233 KB

Is LabView good at precise motion control for things like running an assembly line with lots of cars moving about?

Is LabView good at precise motion control for things like running an
assembly line with lots of cars moving about? Precise speed and
acceleration control? Safety interlocks?
Thanks for any help you can offer!
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Ni pxi motion control, data extraction

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