Problem: Instrument via serial connection
Hello Forum,
I am trying to connect my instrument to my laptop via USB through Serial port. I used NIVISAIC and found the Resource name as ASRL3::INSTR. When I was working with Laview I found the following error
Error 1073807246 occured at property node (arg1) in VISA configure serial port (Instr.). Reason: The resource is valid, but VISA cannot currently access it.
Using the interactive control one of the attribut is in red (Is Port connected: VI_ATTR_ASRL_CONNECTED: Invalid property value
Also when I send Identification query using NIVISAIC, it returns the same command.
I did not understand much of it. However there is a software for the instrument, using which I could connect to the instrument the first time I switch on the system. When I disconnect it and tried once again, it was not connecting.
I had earlier connected Keithley 2400 via GPIB KUSB 488. Is there any problem in connecting two devices. Or is the driver of the software and NIVISA are conflicting with each other.
Please find the screen shots.
Please help.
Thank you.
Attachments:
2.JPG 57 KB
3.JPG 80 KB
4.JPG 93 KB
Hello Dennis,
It did not help much.
7: Write Operation (*IDN?)
Return Count: 5 bytes
8: Read Operation
Return Count: 5 bytes
*IDN?
I tried to query with \n and \r\n; but did no good. There is only one instrument connected to the PC via Serial port.
I would like to know if the identification command is same for all instrument or does it change with manufacturers.
Why does it return the same command that was given to the instrument.
If I am to ignore this, please find the block diagram and manual of the instrument in the attachment. It was said that the commands should be sent as single characters and not as string.
In the block diagram I have used VISA Configure Serial Port, VISA Write, VISA Read and VISA Close vi's. Please tell me whether this is correct. The Commands where given in separate lines or should I use separate VISA Write vi for each characters.
Thank you.
Attachments:
interface.JPG 130 KB
block diagram.JPG 14 KB
PR-655 - 670 Manual.pdf 4053 KB
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MotorTestVI-vi 17 KBThank you for your feedback!
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Mon Oct 2 14:54:00 2006 : lcp_reqci: returning CONFREJ.
Mon Oct 2 14:54:00 2006 : sent [LCP ConfRej id=0x4 <auth pap>]
Mon Oct 2 14:54:00 2006 : rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x7290d549> <pcomp> <accomp>]
Mon Oct 2 14:54:03 2006 : sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x7290d549> <pcomp> <accomp>]
Mon Oct 2 14:54:03 2006 : Hangup (SIGHUP)
Mon Oct 2 14:54:03 2006 : Modem hangup
Mon Oct 2 14:54:03 2006 : Connection terminated.
Any ideas how to get this to work?I wonder if just using Network>Configure>Show>Network Port Configurations, then selecting the existing Bluetooth/Serial connection and duplicating it as many times as needed, the editing them wouldn't help... then you could just have a location for eack Phone.
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Problems with n97 apps connecting to network (Voda...
Problems with n97 apps connecting to network (Vodafone UK – 3G)
Recently a number of my apps which used to connect automatically to the internet (which ever was available – known wi-fi or 3g) have stopped doing this. They now only connect to one known wi-fi.
I’ve tried uninstalling and reinstalling each app, but this hasn’t solved the problem. I’ve checked for software updates and do not believe any have been applied or are available. All apps have been downloaded via Ovi on the phone. I still am able to access the internet by the web browser which was installed on the phone and via google maps (which also still manages GPS position, search, etc).
The apps which I notice causing a problem are:
Sainsbury’s/nectar
Tesco
Map my tracks
Snaptu
Opera Mini
Any one got any ideas???I have the same problem since i updated my mac to 10.5.6.
Each time I have to do a diagnostic and retype the WEP password to have the internet connection. -
Problem with transacted JMS connection factory and transaction timeouts
We encountered an interesting problem using transacted JMS connection factories.
An EJB starts a container managed transaction and tries to validate a credit card
before creating some information to a database for the user, in case of success
an SMS is sent to the user via the transacted JMS queue. If the credit card authentications
duration is about the same as the transactions timeout (in this case the default
30 seconds) sometimes the database inserts is committed but the JMS insert is
rollbacked. How can this be?
If the authorization duration is much longer than 30 seconds everything works
fine (both database and JMS inserts rollbacked), the same is true if a rollback
is insured by calling EJBContext.setRollbackOnly(). The problem thus occurs only
if the duration is approximately the same as the transaction timeout, it appears
that the database insert is not timeouted but the JMS insert is. How can this
be if they are both participating in the same transaction.
The JMSConnectionFactory used is a Connection factory with XA-enabled. The result
is the same also with the default "javax.jms.QueueConnectionFactory" and if we
configure our own factory with user transactions enabled.
Any help appreciated!
Tomas Granö wrote:
> We encountered an interesting problem using transacted JMS connection factories.
> An EJB starts a container managed transaction and tries to validate a credit card
> before creating some information to a database for the user, in case of success
> an SMS is sent to the user via the transacted JMS queue. If the credit card authentications
> duration is about the same as the transactions timeout (in this case the default
> 30 seconds) sometimes the database inserts is committed but the JMS insert is
> rollbacked. How can this be?
It should not be.
>
> If the authorization duration is much longer than 30 seconds everything works
> fine (both database and JMS inserts rollbacked), the same is true if a rollback
> is insured by calling EJBContext.setRollbackOnly(). The problem thus occurs only
> if the duration is approximately the same as the transaction timeout, it appears
> that the database insert is not timeouted but the JMS insert is. How can this
> be if they are both participating in the same transaction.
>
> The JMSConnectionFactory used is a Connection factory with XA-enabled. The result
> is the same also with the default "javax.jms.QueueConnectionFactory" and if we
> configure our own factory with user transactions enabled.
>
> Any help appreciated!
Make sure that your session is not "transacted". In other words,
the first parameter to createSession() must be false. There is an
unfortunate name re-use here. If a session is "transacted", it
maintains an independent "inner transaction" independent of the
outer transaction. From the above description, it seems unlikely
that your application has this wrong, as you say that
"setRollbackOnly" works - but please check anyway.
Make sure that you are using a true XA capable driver and database
(XA "emulation" may not suffice)
Beyond the above, I do not see what can be going wrong. You
may want to try posting to the transactions and jdbc newsgroups. Note
that JMS is appears to be exhibiting the correct behavior, but the
JDBC operation is not. The JDBC operation appears to have
its timeout independent of the transaction monitor's timeout.
Tom
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How to control more than one instrument via different interfaces at the same time
Hi, I am new to Labview. I am working in a project where I have to make a Automated testing tool . So, here is the set up - I have a Chip on a board to which there are several instruments connected namely Agilent power supply, Agilent pattern generator, oscilloscope,Dmm and Thermotron. All these instruments will be connected to the host computer via ethernet, GPIB or RS232. I have to write a program on Labview where the program should be able to communicate with these instruments at the same time and show the ouput on display unit . I have to run the program once, should be able to view the ouputs. So, Is it possible to write such program in Labview??. I have downloaded few instuments drivers. Is it possible to combine those intrument drivers and construct a new VI which would be able to control all this ?? Will it be easier to program this on Labview or I should go for Labwindows/CVI ??.
Please mention some useful sites or tips (if u know) for writing program.
Thanks in advance
shasankaHi Shasanka,
ofcourse it's possible to control more than one instrument at a time.
You should use the VISA routines to access all your devices. Every device get it's 'address' as 'VISA resource name'. This resource name contains information on the used bussystem and the (internal) device address (i.e. GPIB devices have an address number).
So I suggest to read the manual and to look at the examples that come with LabView!
And (from your question) it seems you should take the 3 or 6 hour seminar as well! (Look at www.ni.com -> academics.)
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
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