What is the best approach to the conversion of the LV7.1 tags to the variables shared by several screws LV2012?
What is the best approach for the upgrade of the DSC-LV2012/LV7.1/DSC static variable tags in several screws running on several platforms? Our system is made up of about 5 PC running Windows 2000/LV7.1 DURATION, the more a PLC and a PDC running XP/SP3/LV2012. About 3 PC publish information from the sensor through tags on the local network to the PDC. Only the main command is currently being upgraded. Basic questions:
1. the other computers running RTÉ 7.1 (with labels) will be able to communicate with the PDC running 2012 (shared variables)?
2. is it necessary for conversion of tags shared variables, or the deprecated legacy tag screws of LV7.1 work in LV2012?
3 all of the main controllers will be screw must be integrated in a project in order to use shared variables?
4 is the only way to do it is to find all the tags and replace them with elements of shared variable?
Thank you in advance with all the information and advice!
lb
Hello lb.
Datasockets are the common middle only my knowledge between versions, so apart from the upgrade to the same version, they will probably be your best bet.
Tags: NI Software
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How can I configure the variables shared between executables created in sepparate projects
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http://zone.NI.com/DevZone/CDA/tut/p/ID/9900
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variable sharing, missing data, the timestamp even for two consecutively given
Hello
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Host VI:
In a host of VI on my laptop (HP with Windows XP Prof.) I write data to the shared Variable 'data '. Between two consecutively write operations is a minimum milliseconds of wait time. I use it because I want to make sure that the time stamp of each new value of data is different then a preview (variables shared the resolution is 1 ms)
VI target:
the VI target cRIO-9012 bed only of new data in the way that it compares the timestamp of a new value with the time stamp of the last value on a device in real time.
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rarely, I'm missing a data point (sometimes everything works fine for several hours, transfer thousands of data correctly above all of a sudden failure occurs). With a workaround, I'm able to catch the missing data. I discovered that the missing data have the timestamp exactly the same, then the last point of data read, is so ignored in my data 'legal '.
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Note:
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The example is simple only to display the function of principle, in real time, I also use a handshake and I guarantee that there is no sub - positive and negative.
Simplified example:
Question:
Anyone has an idea why two consecutively data can have the same timestamp?
Where timestamping (evil) Finally comes (System?)?
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-> I tried to work around the problem with the clusters where each data gets a unique ID. It works but it is slower that comparing the timestamps and I could get performance problems.
It would change anything when I animate the shared on the RT System Variable?
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Concerning
Reto
This problem has been resolved in LabVIEW 2010. You can see other bugs corrections in theReadme of LabVIEW 2010.
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Link to the variable of the scan engine
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Binds a variable to a variable of scan engine means that it will keep the same value? I have to do something more? I want to do it this way because I have a VI that find all the variables in the file SystemParameter.lvlib and did things with them.
Hey GreenRiver
If I understand correctly, you bind the network variable to the ProcessInRTD indicator. If you put this code in a while loop with a stop button, what happens? You can have a race condition here, where he reads the network variable and puts this indicator and then reads the temperature of the unit and who refers to the indicator of RTD.
A suggestion I have is just wire the output of IO functionality in the network within a variable period of time loop. Then, on your host VI, read the network variable.
Maybe you are looking for
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