Who uses HP Vee for control?
I alreasy use HP Vee as a data aquisition and display program. Now I want to automize my test set up. Who uses HP vee for control?
I know some folks at Agilent who would argue with you.
They would say that HP split up. HP/Compaq got the name, but Agilent got the soul. I figure in another 10 years, Agilent will be able to buy back the name for about a dime. Maybe a quarter.
-Matt Bradley
************ kudos always appreciated, but only when deserved **************************
Similar Messages
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Hello,
I would like to use data entered in a table to automate air flow volume/sequence to a test chamber. As shown in the table control screen grab, the first column specifies the number of iterations through table elements during a test run and second column data specifies duration for each row sequence. Entries in the other columns are specific to different flow valves and specify set point values required to meter flow.
I guess my question is how can I index/assign each column in the table such that data to operate respective valves are obtained at subsequent iterations whilst simultaneously acquiring data from other components sequentially? Whilst I acknowledge that the solution may be quite simple, I have trawled through various examples and posts on tables and arrays without hitting on a solution. The attached .vi allows me to do some part of the test run.
Best regards,
Callisto
Solved!
Go to Solution.
Attachments:
Chip Firing.vi 34 KBHi Callisto,
If I understand your question correctly then the solution is in fact fairly straightforward. The important point to bear in min is the fact that the Table control can effectively be dealt with as an array of string. You can then use all of the traditional array manipulation tools and techniques to manipulate your data as you want. For example, use the Index Array function to extract specific columns and then if you want to pass individual elements within a column into a loop, wire the array up to the loop and ensure that Indexing is enabled. If you then want to use these data elements to drive your test application, you may want to convert some of the resulting string into more useful numeric's.
All of these concepts are demonstrated in the attached VI. I hope this helps, but let me know if you have any further questions.
Best Regards,
Christian Hartshorne
NIUK
Attachments:
926242 - Table Control.vi 9 KB -
Who uses a case for their iPhone 3GS?
I have a case I've been using just to protect the back of my iPhone. I'm thinking of taking it off and just going naked (the phone that is).
Anyone have any problems with their naked iPhone in their pocket? Any scratches? Just wondering.
Thanks.dbell-mac wrote:
I have a case I've been using just to protect the back of my iPhone. I'm thinking of taking it off and just going naked (the phone that is).
Anyone have any problems with their naked iPhone in their pocket? Any scratches? Just wondering.
Thanks.
Has long as you do not have coins or keys or the like in your pocket, then your iPhone should not get scratched while in your pocket.
I have a leather case for my iPhone (this one)
http://store.apple.com/uk/product/TU776ZM/A?fnode=MTY1NDA0NA&mco=MTE0MzU0NjY
It doesn't add any additional bulk to the iPhone and it just gives the iPhone a cover of the front, back, sides, it also has a soft velveteen interior. I can highly recommend the case. -
I have started using it more and more for post & sound design duties particularly since version 8.
Anyone else ?I do as well. Its alright. I still think i might like protools better but for the price difference and ability to use different equipment you can help but take a serious look at Logic.
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Can I use 7344 card to control other dynamic system
Excuse me
I want to control a piezoelectric stripe actuator, I just want to input a step function to the actuator and use the 7344 PID controller to control the actuator.
step input | 7344 | | | step response
--->o--->| PID |--->|actuator|--------->
^ |controller | ---------- |
| ------------ |
|___________________________________|
feedback
Dose 7344 controller satisfy my request?
Thank youIn fact the control algorithm on the 7344 can be used for a variety of control tasks. I have dealt with customers who use the board for controlling force, pressure, piezo stack actuators and piezo ultrasonic motors. As long as your drive provides an analog control input and an appropriate feedback signal (quadrature encoder or analog output) I don't see a reason why the 7344 shouldn't be able to control a piezo stripe actuator.
I don't know much about the characteristics of a piezo stripe actuator but maybe you will have to consider setting the parameters for a static friction deadzone in the 7344 configuration in addition to the normal PID parameters. You need to set these parameters whenever there is a deadzone around the zero voltage output. Refer to this link for further information about deadzone compensation.
Best regards,
Jochen Klier
National Instruments Germany -
hello,
what do folks here think of apache beehive controls?
i first used controls with bea weblogic workshop 8.1 back in '05 (before bea open-sourced them). i also recently used beehive web service controls on an soa project (the customer originally hired bea to architect the project). but, outside of bea's or apache beehive's own websites, i haven't come across any objective, independent discussion of the technology.
myself, i think they are a neat technology. but i wonder why more developers don't use them in their j2ee projects? is it because people have opted for spring instead? i noticed there are practically zero jobs requiring beehive control experience posted on the job boards? i did come across a couple on monster and dice; but it was bea systems themselves who were looking for people.
what would it take to get you to consider using beehive controls (web service controls, ejb controls, jms controls, jdbc controls, etc.) in your j2ee projects?
thanks in advance for your replies.I have used beehive controls. Things like MQcontrol come in handy sometimes. However, I am not sure how good are DatabaseControls compared to things like Hibernate?
As far as job requirements are concerned, I would think using beehive controls is easy (with few exceptions) to count as serious requirement. Any good java dev should be able to handle it. If you were talking about developing beehive control api that would take some good skills and I guess thats where you may have seen it in BEA job reqs. -
Using asynchronous timer for data flow control
Hi all,
I am using system sleep to control the data flow (some digital lines and analog output). The pseudo code is something like this
Sleep(150);
// the following sections are exectuted in parallel
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to another digitla line
#pragma omp section
Sleep(2); // sleep 2ms
// the following sections are exectuted in parallel
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to one channel
#pragma omp section
Sleep(1); // delay 1ms
// the following sections are exectuted in parallel
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to one channel
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to another channel
#pragma omp section
Sleep(11); // delay 11ms
// ... other stuffs
I am running windows XP and I know it is not possible to get realtime control but I want a as precise timing as possible. Above code is not perfect but it works 95% of times. I just read an article about using the asynchronous timer to control the time delay. I try that idea with the following code frame
int CVICALLBACK ATCallback(int reserved, int timerId, int event, void *callbackData, int eventData1, int eventData2)
if (event==EVENT_TIMER_TICK)
int *nextdelay = (int *)callbackData;
SuspendAsyncTimerCallbacks();
if (timerId>=0)
double time;
if (*nextdelay==0) time=2.0;
else if (*nextdelay==1) time=1.0;
else time=12.0;
SetAsyncTimerAttribute(timerId, ASYNC_ATTR_INTERVAL, time);
if (*nextdelay==0)
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to another digitla line
*nextdelay++;
else if (*nextdelay==2)
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to one channel
*nextdelay++;
else if (*nextdelay==3)
#pragma omp parallel sections
#pragma omp section
DAQmxWriteDigitalLines(...); // output TTL to one digitla line
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to one channel
#pragma omp section
DAQmxWriteAnalogScalarF64(...); // analog output to another channel
*nextdelay++;
ResumeAsyncTimerCallbacks();
return 0;
void main(void)
int n = 0;
int timeid;
timeid = NewAsyncTimer(120.0/1000.0, 3, 1, ATCallback, &n);
But it doesn't work. There is no compilation and runtime error but the timing just not right. I wonder do I have to suspend the timer in the callback function when I reset the delay for next call? If I do so, I am worry if it will apply too much delay (since I suspend and resume the timer in the delay) so it will cause even worse timing. But if I don't suspend the timer before I reset the time, what happen if the code running in the callback function not finished before the next callback arrive. It is quite confusing how to use asynchronous timer in this case. Thanks.Yeah, unfortunately the 6711 doesn't have clocked digital I/O. There are only two counters anyway so even if you could use them to generate your signals you wouldn't have enough (*maybe* something with the 4 AO channels and a counter depending on what your output signals need to look like? The AO channels can output "digital" as well if you write 0V or 5V only).
A PCI DAQ card which does support clocked digital I/O and has 2 analog outputs is the 6221 (or if you could use PCIe the 6321 is a more updated version with two extra counters and some additional functionality).
If there isn't a way to implement clocked outputs afterall, one thing you could do to make your code a little more efficient is to consolidate the writes. You can put your digital lines into a single task and write them at ocne, and you can put your analog channels into a single task and write them at once as well.
I'm not sure about the callback issue, you might find some more help in the CVI forum. I don't think it's going to solve your underlying problem though as ultimately the execution timing of your software calls is at the mercy of your OS.
Best Regards,
John Passiak -
What does this message mean baring in mind we don't know who 'Lareib' is?: ''Lareibs phone' is now using (my number) for iMessage'
How would we users in this forum also know who Lareib is?
It means what is stated, that person is now using your number for imessage. -
We have several apple devices in our family who use my debit card for itune charges. I need to find out which device (itune account) these charges are coming from. Can you help?
You can't tell which device a purhcase was made on, but if your family members each have their own iTunes account to which your card is linked then you can check the purchase history on each of those accounts via the Store > View Account menu option on your computer's iTunes - that should have 'purchase history' section with a 'see all' link to the right of it
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My macbook keeps asking me to use an administrator and their password to continue but nobody seems to know who is the administrator for this computer...does anyone know how to avoid this this or figure out who the administrator is?
Lynne130,
to figure out which users have administrative privileges, open the Users & Groups pane of System Preferences; each user other than the Guest User will be shown with a description of either “Admin” or “Standard”. It’s typical for the first user created on a Mac to be an administrative user. -
I am not able to update my apps because every time I am doing this, it is asking for a password which I have never used and the person who used it is in no more contact. how can i get my id instead of his??
Apps can only be updated using the same Apple ID and password they were originally purchased with.
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Has anyone else who uses AT&T as their carrier been told if you cannot access your voicemail through your iPhone that there is no way to check your voicemails? This is an issue since I had to send my phone in for repair. Thank you
You received incorrect information from AT&T. You can indeed access your voicemail without your iPhone.
Call AT&T at (800) 331-0500 (assuming you're in the U.S.). This is a 24 hour a day, 7 day a week number. Ask them how to access your voicemail. Normally, you would just do this by dialing your number from another phone, typing "*" once your voicemail recording starts, and entering your password. You don't know your password, so it's probably the last four digits of your phone number or perhaps the seven - or ten-digit phone number. Let the AT&T person tell you. -
I am trying to understand the licensing procedures for using tabKiller for 3.5.7 firefox. Who should I contact for this? I do not have the customer service phone number for Firefox
Tab Killer is not created by Mozilla, it is created by a private individual who has made it available at no cost for other people to use.
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Volume control when using Apple TV for playing video
Hi,
I'm using a pair of active speakers with no built in volume control with my Apple TV. When using the ATV for streaming audio (for example Spotify) I can control the volume with the iOS device I'm using as the source, but not while streaming video. Why is that, and, is there anything I can do about it?
//Jdoes the sound on the pad work for face time when you are using in on the pad, with no apple tv involved?
If so - apple tv uses a ton of resources. Facetime uses a ton of resources. facetime over the TV is hit or miss.
doulble tap the home button, and see what is in the rask bar. Close off everything else by touching and holding an icon until they jiggle, the close them by touchinmg the minus sign. -
Iphone 4s - how do I change the name in the contacts for the owner of the phone - it is coming up as the other person who uses the laptop - so when ringing or texting anyone 2 names are being used as the caller id on the screen
*Ralph Johns* writes:
"Your options are:
Get a trial account form @mac which will work as an iChat name after the 60 days run out but not be a email account that is valid (And is free)"
Do you mean a trial account from .Mac? (DotMac)
"Get an AIM Screen name and set it to Display what you want as you set it up.
The Screen name can be whatever yu want but you can also set it to display something else as well."
I had thought about this, but it seems other people have already chosen the screen name "pinksharkmark" and virtually every variation of it I can think of. So that isn't an option for me. As for getting it to display something else as well, do you mean that if I were to get an AIM screen name like "CromulentCat" I could somehow log in to iChat under the AIM account "CromulentCat" yet get iChat to represent me to my Buddies as "PinkSharkMark"? Because I have to admit I don't see how that can be done. It appears as if iChat displays to anyone chatting with you precisely the account name you logged in under and nothing else. So if you logged in using a .Mac account, then you are displayed as "[email protected]" while if you logged in under an AIM account, you are displayed as "CromulentCat". But that's it that's all... there is no way to change CromulentCat to PinkSharkMark.
Thanks very much for taking the time to reply, though.
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