Convert 8.2.1 VIs to 7.1 VIs

Hi all!
I am working on USB micro's U421 USB interface. I found the following VIs on the internet, which are very useful to my project. But, they are in LabView 8.2.1, whereas I have a licensed version of LabView 7.1. I would be really grateful to you if anyone can please convert the VIs in the following attachment into LabView 7.1 VIs.
Attachments:
LabViewSPI.zip ‏168 KB

Hi kiriti,
you already posted that question in the correct thread... So why did you create a double post then?
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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How to convert a string to visa resource name

I have a string , like "visa://192.168.123.212/RIO0::INSTR", how can I convert it to a Labview visa resource name? The resource name is going to be used for "Open VI reference" control.
Also, a related question is , is there a special vi control for ip address input? How do I check whether the input ip address is in valid format or not?

Just wire it up. A string will coerce to a resource name.
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Hello, Can anyone help me to convert these LV6.1 vis that I can view them with LV6.02?

Thanks,
Ogulcan Kaya
Attachments:
ex.zip ‏136 KB

The vi's contain some items specific to LV 6.1. They no longer run, but here you go anyway. You might be able to get them back working in 6.02 with some effort, or at least see what's being done.
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Attachments:
converted_6i.zip ‏108 KB

Connecting hp 8508a vector voltmeter with agilent 82357a usb/gpib converter

Hello
For my experiment, I need to connect to a HP 8508A vector voltmeter by using an agilent 82357A usb/gpib converter. I have a serious problem about communicating with my device using NI-VISA. I tried to do the steps indicated at following links which were indicated at the forum posts by people using 82357A:
http://digital.ni.com/public.nsf/allkb/F7C187DBF09EBE1186256F550065BD32?OpenDocument,
http://digital.ni.com/public.nsf/websearch/3B3626D9C1F999218625694200791AD7?OpenDocument,
http://cp.literature.agilent.com/litweb/pdf/5990-3731EN.pdf?cmpid=1273CN.
The version of MAX is 4.3.0f0 and i am using labview 8.5 with NI-VISA 8.2. I am trying to configure my 82357A using agilent io libraries suite 14.1.
First, I tried to configure my usb/gpib controller using agilent connection expert and set the visa interface id to GPIB6 and connect to the 82357A without any problems. Then I connect this gpib converter to my vector voltmeter. The gpib adress of the voltmeter was 6(gpib address of the interface converter was 10) so visa address GPIB6::6::INSTR was assigned to voltmeter by connection expert. I tried to connect to the voltmeter from the connection expert by using the agilent interactive IO. Send *IDN? command and took the proper response from the voltmeter. The voltmeter went into remote mode and I tried to read the voltage values by using the FETCH? command of the device and got the voltage properly which means I successfully connected to the device.Then I went to MAX and enabled the NIVISATulip.dll and restarted the MAX. Then I went back to agilent connection expert and checked the box: "use agilent 488 library where possible" for side-by-side communication between the NI and agilent visa. By the way agilent visa was installed as the secondary library. Then when I went back to MAX, I start to see the voltmeter under miscellaneous VISA resources with the address GPIB6::6::INSTR. But the problem started here. When I tried to send commands from MAX to voltmeter with the "open visa test panel" I encountered an error which exactly says:"unable to open session to GPIB6::6::INSTR, return status code:0xBFFF009E, status name:VI_ERROR_LIBRARY_NFOUND, a code library required by VISA couldn't be located or loaded." As I said before i enabled the libraries of agilent 488 from the options of the agilent connection expert. When I went back to connection expert and unchecked the box for using agilent 488 libraries nothing changed. Also when I went to NI-VISA interactive control I couldn't see my device under the tab of VISA I/O.
I tried to read some posts from this forum. People are using this usb/gpib converter successfully without any problems by performing the steps I have done. I have some questions about possible subtle points specific to my application.
First question is according to the manual of the voltmeter(this is an old device by the way from 1988):"vector voltmeter is capable of remote operation via the HP-IB which is HP's implementation of IEEE standard 488.1 "So, what I understand from this sentence is my device is communicating remotely with IEEE standard 488.1 and not 488.2 Does it make any problem? What kind of modifications should I do to my setup for overcoming this if it creates any problems? As I said before I was communicating with device very properly from the agilent connection expert. In manual there is also a sentence like "HP-IB commands used in the vector voltmeter conform to the standards set by document IEEE 488.2 1987."
Second question is should I install newer versions of agilent io libraries suite or MAX or NI-VISA. I wrote the versions I am using before are they compatible? Where can I install newer versions? As I know the newest version of the agilent io libraries suite is 15.1 or 2. Is is compatible with 82357a?(maybe I should ask this question to agilent people)
Third question I don't remember how I did it but agilent visa is indicated as secondary visa resource in agilent connection expert(I think I did it while installing agilent io libraries suite.) . How can I switch between NI and agilent visa as primary visa resource? Do you think think this will help?
I terribly need measurements from this set up and really appreciate your help if possible.
Sincerely
Caglar Yavuz, University of Michigan,Ann Arbor,EECS department.

Caglar,
The documents you mention ahould include the proper prcedure for using this hardware in LabVIEW. Here are my recommendations:
The version of NI-VISA you mentioned is not valid. The most recent version is 4.6.2. I would recommend ugrading if you do not have this version. After the upgrade,ensure that tulip is enabled as well as the other settings and see if this helps.
When talking about the instrument, the biggest concern that usually is relevant with 488.1 is that it will not respond to *IDN?. In your case, it looks like it does, and should work as 488.2 is backwards compatible. It seems to me, the issue is still with the 82357A, and we have not yet reached the voltmeter.
In order for NI-VISA to work with your device, NI-VISA must be the primary visa driver.
Hope this helps, let us know how the upgrade turns out. If you continue to have issues, take some screenshots of the preferences in MAX and upload them on the forum.
Regards,
Peter Flores
Applications Engineer

VISA Labview 8 variant

Labview 8 runing on windows xp Pro
crashes with this error message
when trying to convert variant value of VISA resource name to string.
see attached example VI
This VI was working great in Labview 7.0
Attachments:
Windows xp Error.JPG ‏7 KB
Test VISA Variant to String Bug.vi ‏9 KB

This has been reported to R&D (# 3WKDUGV2) for further investigation. A
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Hi there,
I'm using a Basler acA2000-340kc camera through an PCIe-1473R FPGA as frame grabber.
I would like to be able to configure the camera through the serial port just in LabView, not using a third-party as Pylon (which I can do now).
According to this forum post
http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/My-Basler-acA2040-180km-NIR-is-not-visible-in...
this is possible just taking the VI posted here
https://decibel.ni.com/content/docs/DOC-5049
and converting from IMAQ to VISA, as RIO frame grabbers cannot use IMAQ. I have been trying to do this by changing the IMAQ vi to their VISA equivalents, but I have no good results.
Does anyone know which are the steps to go from that piece of code to one that can be used to control the camera in my case?
Thanks a lot,

Hi i.popa,
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Help required with DAQ and waveform generation

Hi,
I'm using DAQ 6024E card for waveform acquisition using LabVIEW 8.2 version. I've also attached my vi for your reference.
My next step is , I want to add another waveform to the acquired waveform, i.e. I mean to say if the acquired waveform is a sine wave with 60 Hz frequency and amplitude of 8V peak-to-peak, I want to finally display a wave which is 8V peak-to-peak with sinusoidally changing freuency.
To be more clear...I want a sine wave with frequency = 60 Hz + 1*sin( 2*pie**t).
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Looking forward to hear soon,
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Attachments:
test_analog.vi ‏162 KB

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Wrong use of "Scan From String" function in a while loop?

Hi,
I've got a "Scan From String" function inside a while loop. On the first iteration it converts correctly the number passed by the input string (for example 4) But on the second one it has only spaces (one or more \s) as input string.
I expected to obtain a zero as output (as it does always that it can not make any conversions, as I am supposed to) but indeed, i subtracts 1 from the previous number (according to the number indicated as example I would obtain a 3 as output)
What's wrong with this?
Does the function fails on this case?
The rest of the diagram o the VI is expected to manage a 0 on that situation, like others in which the conversion is not made.
Andres.

I have simplified the VI evading calls to other VIs and trying to reproduce the mistake.
The type of string I introduce to reproduce the mistake is:
clock 3 (30) clock (40)
Forgetting to introduce a number between the second "clock" and the following parenthesis, I would manage it programmatically with code that isn't included.
Then "Scan From String" is supposed to do not make a conversion. But it leaves a 2 as output (in this example)
I have realised, unbelievable but true, that it has matter with the number I substract to the output number (if it were 2, I would obtain 1 as output and so on)
Excluding that, I got the conversion made before as output, 3, on the second time that "Scan From String" executes. But, how can this func
tion as bad?
I am using LV4 on an old PC. I have tried to reproduce it with LV6 and it works. But it isn't desirable for me, I would have to convert a lot of VIs and surely I will find a lot of errors due to the conversion (I have already tried)
Attachments:
EXTCLOCK.VI ‏26 KB

Help with a SQL Query

Per my clients requirement, they need to pull all patients with two qualifying visits in the past 2 years. What I have now, I believe is just ones for the past year - looking on ways to better imporve the coding to pull this info.
SET NOCOUNT ON
DECLARE
@StartDate DATETIME ,
@EndDate DATETIME ,
@groupby1 VARCHAR(60)
SET @StartDate = ISNULL(NULL,'1/1/1900')
SET @EndDate = ISNULL(NULL,'1/1/3000')
SET @groupby1 = CONVERT(VARCHAR(60),'None')
DECLARE @AgeDate DATETIME
DECLARE @Year DATETIME
DECLARE @EndRptDate DATETIME
DECLARE @StartRptDate DATETIME
SET @AgeDate = '12/31/' + CONVERT(VARCHAR , YEAR('12/31/2013'))
SET @Year = CONVERT(VARCHAR , ( YEAR('12/31/2013') ))
SET @StartRptDate = CONVERT(VARCHAR , ( '01/01/2013' ))
SET @EndRptDate = CONVERT(VARCHAR , ( '12/31/2013' ))
DECLARE @qmed INT
DECLARE @qden INT
DECLARE @qbh INT
DECLARE @qsa INT
DECLARE @qen INT
DECLARE @qop INT
SELECT @qmed = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - MED'
SELECT @qden = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - DEN'
SELECT @qbh = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - BH'
SELECT @qsa = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - SA'
SELECT @qen = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - EN'
SELECT @qop = MedListsId FROM MedLists WHERE TableName = 'ProcedureCodeQualifier' AND Description = 'HCPC - OP'
IF OBJECT_ID('tempdb..#Temp') IS NOT NULL
DROP TABLE #Temp
--- Return visits with HCPC Qualifier
--- Per Clients requirement, patients aged 50 - 80 with at least 2 qualifying visits in the last 2 years.
SELECT DISTINCT
pv.PatientProfileId,
pv.PatientVisitId,
pv.Visit,
ml.Description
INTO #Temp
FROM
PatientVisitProcs pvp
LEFT OUTER JOIN PatientVisit pv ON pv.patientvisitid = pvp.patientvisitid
INNER JOIN PatientProfile pp ON pv.PatientProfileId = pp.PatientProfileId
LEFT OUTER JOIN MedLists ml ON ml.Medlistsid = pvp.CPTProcedureCodeQualifierMId
WHERE
CPTProcedureCodeQualifierMId IN(@qmed, @qden, @qbh, @qsa, @qen, @qop)
AND ISNULL(pvp.voided,0) = 0 --filter out voided visits
AND pvp.DateOfServiceFrom >= @startdate AND pvp.DateOfServiceFrom < @enddate + 1
AND DATEPART(Year , pv.visit) = DATEPART(Year , @EndRptDate) -- limit to visits in this year
AND -- Filter on Age
(('50' = '-1' AND '80' = '125') OR (CAST((DATEDIFF(DAY,pp.Birthdate,@AgeDate) /365.25) AS INT) BETWEEN ('50') AND ('80')))
GROUP BY
pv.PatientProfileId ,
pv.PatientVisitId ,
pv.Visit ,
ml.Description
HAVING
COUNT(*) >= 2
-- must have 2+ visits in last 2 years
SELECT
dbo.FormatName(pp.Prefix , pp.First , pp.Middle , pp.Last , pp.Suffix) AS Name ,
pp.PatientId ,
ISNULL(CONVERT(VARCHAR(20), pp.BirthDate, 101),'') AS Birthdate ,
( DATEDIFF(day , pp.Birthdate , @AgeDate) / 365.25 ) AS Age ,
ISNULL(pp.Address1 , '') AS PatientAddr1 ,
ISNULL(pp.Address2 , '') AS PatientAddr2 ,
pp.Address1 + ' ' + ISNULL(pp.Address2 , '') AS PatientAddress ,
ISNULL(pp.City , '') AS PatientCity ,
ISNULL(pp.State , '') AS PatientState ,
ISNULL(pp.Zip , '') AS PatientZip ,
ISNULL(pp.Country , '') AS PatientCountry ,
ISNULL(pp.Address1 , '') + ISNULL(' ' + pp.Address2 , '') + ISNULL(pp.City , '') + ISNULL(', ' + pp.State , '') + ISNULL(' ' + pp.Zip , '') AS PatientFullAddr ,
ISNULL(dbo.formatphone(pp.phone1 , 1) , '') AS [Phone 1] ,
ISNULL(pp.Phone1Type , ' ') AS [Phone 1 Type] ,
ISNULL(dbo.formatphone(pp.phone2 , 1) , '') AS [Phone 2] ,
ISNULL(pp.Phone2Type , ' ') AS [Phone 2 Type] ,
ISNULL(dbo.formatphone(pp.phone3 , 1) , '') AS [Phone 3] ,
ISNULL(pp.Phone3Type , ' ') AS [Phone 3 Type] ,
pv.TicketNumber ,
ISNULL(CONVERT(VARCHAR(20) , ( pv.Visit ) , 101) , '') AS [Visit] ,
pv.Visit AS PatientVisit ,
fac.ListName AS Facility ,
doc.ListName AS Doctor
FROM
PatientVisit pv
JOIN #Temp t ON pv.PatientVisitId = t.PatientVisitId
INNER JOIN PatientProfile pp ON pv.PatientProfileId = pp.PatientProfileId
INNER JOIN DoctorFacility fac ON pv.FacilityId = fac.DoctorFacilityId
LEFT JOIN DoctorFacility doc ON pv.DoctorID = doc.DoctorFacilityID

If I understand the problem correctly, this criterion
AND DATEPART(Year , pv.visit) = DATEPART(Year , @EndRptDate) -
needs to be changed to
AND pv.visit >=dateadd(year, -2, @EndRptDate) and pv.visit <= @EndRptDate
For every expert, there is an equal and opposite expert. - Becker's Law
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Frequent Crashes - Running, Exiting, While in Block Diagram...

I am suffering from frequent crashes and lockups of LabVIEW 8.5 Base version. I have not been able to pin down the root as the occurances may happen when my program is running , or when I try to exit, or when working in a block diagram. It seems like it is more likely to occur in and around vi's created using the dll conversion wizard. The vi's are for the API for Silicon Labs CP210x USB to UART configuration. In my test the device powered on an off several times and so appears and disappears several times, and this gets repeated as new devices are tested.
How do I track this down?
How do I practice "safe" programming to avoid unexpected occurances that crash LabView?

Hi MG,
Are you using the Import Shared Library Utility from Tools >> Import >> Shared Library (.dll)? This is a tool within LabVIEW that can be used to convert shared libraries to VIs.
In response to your most recent question, by controlling or adding a timeout for the COM (USB) communication you would be able to stop a portion of the process or the entire VI. This is because when the timeout value is exceeded this initiates an error which will propagate to the subsequent code and prevent any further operations from executing. In order to stop this error chain from continuing to the end of the code a General Error Handler VI can be used with the COM timeout error code wired to the 'exception code' terminal to ignore this error for future code execution.
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Jason W.
National Instruments
Applications Engineer

IVI Shared Components

Is the down load of the "shared componets" from the IVI foundation a replacement for the 750 mega byte NI-VISA down load?
See:
http://www.ivifoundation.org/shared_components/Default.aspx
In other words will the "shared compnents" allow me to use my USB to GPIB converter with visa32.lib, visa.h, and visa-type.h?

Frank_Zappa wrote:
Is the down load of the "shared componets" from the IVI foundation a replacement for the 750 mega byte NI-VISA down load?
No. Nothing to do with each other.

Optimising Execution speeds

Hi,
I'm constructing a program that sends commands down the serial port and
reads the data coming in. This data is in the form of character strings
which I am converting in various conversion VIs to data that can be
displayed on dials etc. I'm experiencing problems trying to get the dials
to run smoothly and wondered what ways other than mentioned in the help
files are there to optimise performance. So far I have placed all the
conversions in a separate VI which then writes to global variables. These
globals are then called in the display VI in a while loop - iterating as
fast as possible. I load the conversion VIs up at the start of opening the
display VI and set them running in the background when required. My ma
in
problem is I want the data displayed on the dials to be as near as is
possible to real-time. I would be grateful for any help. The serial port
link is running at 19200 baud.
Regards,
Martin.

> I'm constructing a program that sends commands down the serial port and
> reads the data coming in. This data is in the form of character strings
> which I am converting in various conversion VIs to data that can be
> displayed on dials etc. I'm experiencing problems trying to get the dials
> to run smoothly and wondered what ways other than mentioned in the help
> files are there to optimise performance. So far I have placed all the
> conversions in a separate VI which then writes to global variables. These
> globals are then called in the display VI in a while loop - iterating as
> fast as possible. I load the conversion VIs up at the start of opening the
> display VI and set them running in the background when required. My main
> problem is I want th
e data displayed on the dials to be as near as is
> possible to real-time. I would be grateful for any help. The serial port
> link is running at 19200 baud.
>
As fast as possible is usually way too fast for UI stuff, and consumes too
much CPU time not allowing the other loop to run as often as you like. You
can either put a delay in the UI loop, like 10ms, you can put the two
loops together, or you can use synchronization VIs to control how often
the UI loop is coaxed to run.
Another thing to do is to use the profile tool to see how much time different
VIs are taking. You can then focus on easing the load on that VI.
Often it
is due to a runaway loop that is guaranteed to eat as much processor
time as
is available. While this often seems like a good idea at the time, it can
mean that globals are being polled 100,000s of times per second, and even
though the controls are fast, 60-100Hz is all the screen updates anyway; so
you want to slow it down to run less often, which will
allow for the other
tasks to run more quickly or just lighten the CPU load and make the machine
feel more responsive.
Greg McKaskle

DAQmx physical channel error message

Hi,
I am new to Labview but I managed to create a new analogue voltage input task in Measurement and Automation Explorer. I am using DAQmx create virtual channel VI but I am getting an error message saying that "required input physical channel is not wired". Any idea why I am getting this error message. Also what is the difference between using DAQmx Assistant and using VI's like DAQmx create virtual channel, DAQmx timing etc.Any help is appreciated.
Thanks
Duran
Attachments:
error2.JPG ‏171 KB

The first VI 'Create Virtual Cannel' has an input called physical channel. This needs an input. Right click on the terminal and select Create>Constant. Then you can select the channel (something like Dev1/ai0).
To your 2nd Q: The assistant is a fast way to configure your measurement. You can later also convert it to the VIs you use now. Using the VIs gives you full programmatically control of the task. (The meaningful phrases are 'configure' and 'full programmatically').
Felix
www.aescusoft.de
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Convert 8.2.1 VIs to 7.1 VIs

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