variables of user-defined data transfer

Hello

I use the etherCAT 9144 chassis and is only supported by this hardware FIFO range target. After a search, I realized that the only way to transfer data from FPGA to the host by using user-defined variables. But these variables do not support the notion of FIFO. So which is the best practice to transfer data after measures (provable 10 Hz measurement of 15 values) to host VI?

Thank you

As mentioned, the 9144 only supports the analytical engine.

In regards to what you do, it really depends on the entire application. For example, what is the master? Are there other systems at issue here? Etc. It's a good read, in general, although it might not help this second right: http://www.ni.com/white-paper/14151/en/

A high level, you need to decide what you need. If you have need for deterministic communication, low-latency over long distances from a RT controller, the 9144 is probably the right choice. If you need low latency + streaming over short distances to a RT controller, you should look into the RIO MXI chassis. If you need mainly not deterministic low speed (10 hz) data mixed with low flow continuous over long distances to a windows or host RT, then ethernet expansion rio (9146,7,8,9) is probably the right choice. If you need high speed continuous with low control latency over long distances to a windows or RT host, you need a full cRIO controller. Based on what you've posted so far, its uncertain is the right person.

Lets say you're stuck with the 9144 for now. As you can easily hit 1 kHz scanning cycles, it should be perfectly possible to data 'stream' to 10 Hz. If you run the scan at 1 kHz engine, then you are 100 x oversampling. Where it gets complicated is this requirement of sync. By default, acquisition input/output is synchronized to the clock of the scan (and you can see when the clock of scan is set by a knot of e/s FPGA). However, you can take complete control of a module in the FPGA and read inputs and outputs at any time if you please. In other words, you can set up so when DIO0 goes high you immediately enjoy all the values of AI 15. You can then transfer these values HAVE switched to the host using the user-defined variables.

Tags: NI Software

Similar Questions

Querying the user-defined types
I have a chart in which one of the columns is a user-defined data type:
```
SQL> describe my_table
...
USER_DATA    MYTYPE
```
The type 'MYTYPE' is a simple object that contains a field: a CLOB called MESSAGE:
```
SQL> describe mytype
Name       Null?    Type
------     -----    ----
MESSAGE          CLOB
```
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csimons,

Try this:
```
select  t1.user_data.message
from    eimgr.aq_rtv_docs_out_table t1
where   rownum = 1;
```
See you soon

Edited by: Frenchwood on September 22, 2009 22:38

9144 with FPGA and SGL EtherCAT custom user-defined Variables?

Hello

I currently have a small instrument driver (rs485) running on a chassis of 9144. The output values are communicated to the master EtherCAT using FXP numbers. I would like to pass these FXP to SGL, since I've upgraded to SP1 2012 LV with FPGA now supports numbers of SGL.

Is this possible? I tried several times to create the Variables defined by the user of SGL in the project, but the date type is gray.

Greetings from Munich,

Götz

Unfortunately, SGL is not a data type supported for communication to and from a 9144. The types of data available for the I/O user-defined variables are:

* Fixed point
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More information on I/O user-defined variables can be found at:

Programming EtherCAT i/o with FPGA Intelligence to: Differences in LabVIEW FPGA programming API
http://www.NI.com/white-paper/10618/en#toc4

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Hi Lucie,.

The /o Variables using the help documentation gives a pretty good explanation of what a user-defined variable is in the section "data i/o Variables for Custom FPGA of e/s". I hope that this documentation helps!

Best,

tannerite

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|
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See you soon... Rick

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User Defined functions in the Mapper

I have user-defined functions that work in BPEL but I can't make them work in the Mapper. They appear when expected for jDeveloper but throw "function not found" errors
Can someone look at my config files and see if the error comes out? Thank you bunches!
BPEL file:

" < soa-xpath-functions xmlns =" http://xmlns.Oracle.com/SOA/config/XPath "" "

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

version = "11.1.1.

resourceBundle = "oracle.tip.tools.ide.common.resource.IDEMessageBundle"

>

< name of the function = "f17:editCaseNumber" >

com.F17.CustomFunction.editCaseNumber < className > < / className >

< return type = "tree" / >

< params >

< param name = "stringToFormat" type = "string" / >

< param name = "order" type = "string" / >

< / params >

number of valid cases and formats < desc > < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:editCaseNumber(string,string) 

Channel 1 is the data 

Channel 2 is the command. Valid commands are: 

1 = number of control check and come back as nnnnnnnnnn 

2 = number of control check and come back as nnn-nnnnnnn 

3 = Append check digit and return under nnnnnnnnnn 

4 = Append check digit and return under nnn-nnnnnnn

 

Returns XML document fragment: 

Import of f17userDefinedFusnctions.xsd space variable prototype. 

See documentation for more details.]] >

< / details >

< / feature >

< name of the function = "f17:compressFile" >

com.F17.CustomFunction.compressFile < className > < / className >

< return type = "tree" / >

< params >

< param name = "stringToFormat" type = "string" / >

< / params >

< desc > compress long strings by DB storage < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:compresFile (string)

 

Returns XML document fragment: 

See documentation for more details.]] >

< / details >

< / feature >

< name of the function = "f17:sortList" >

com.F17.CustomFunction.sortList < className > < / className >

< return type = "tree" / >

< params >

< param name = "listIn" type = "string" / >

< / params >

lists of kinds of < desc > < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:sortList (String) 

Build the string as: & lt; list & gt; & lt; point & gt; [data] & lt; / point & gt;... & lt; / list & gt; 

Returns XML document fragment: 

Import of f17userDefinedFusnctions.xsd space variable prototype. 

See documentation for more details.]] >

< / details >

< / feature >

< name of the function = "f17:replaceString" >

com.F17.CustomFunction.replaceString < className > < / className >

< return type = "string" / >

< params >

< param name = "StringToFix" type = "string" / >

< param name = "RegX" type = "string" / >

< param name = "replaceString" type = "string" / >

< param name = "mode" type = "string" / >

< / params >

Sets < desc > replaceFirst and replaceAll functions java < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:replaceString(String,String,String,String) 

Chain change, regular expression, mode [optional] replace the string - 1 = all, 2 = first by default all the 

See documentation for more details.]] >

< / details >

< / feature >

< / soa-xpath-functions >

file Mapper:

< soa-xpath-functions

" xmlns =" http://xmlns.Oracle.com/SOA/config/XPath "" "

' xmlns:repl = ' http://www.Oracle.com/xsl/transform/Java/COM.F17.CustomFunction.replaceString "" "

' xmlns:comp = ' http://www.Oracle.com/xsl/transform/Java/COM.F17.CustomFunction.compressFile "" "

version = "11.1.1.

resourceBundle = "oracle.tip.tools.ide.common.resource.IDEMessageBundle"

>

< name of the function = ' model: compressFile ">

com.F17.CustomFunction.compressFile < className > < / className >

< return type = "tree" / >

< params >

< param name = "stringToFormat" type = "string" / >

< / params >

< desc > compress long strings by DB storage < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:compresFile (string)

 

Returns XML document fragment: 

See documentation for more details.]] >

< / details >

< / feature >

< name of the function = "repl:replaceString" >

com.F17.CustomFunction.replaceString < className > < / className >

< return type = "string" / >

< params >

< param name = "StringToFix" type = "string" / >

< param name = "RegX" type = "string" / >

< param name = "replaceString" type = "string" / >

< param name = "mode" type = "string" / >

< / params >

Sets < desc > replaceFirst and replaceAll functions java < / desc >

< detail >

<! [CDATA [this is a custom function.] If you use it, you must include the

Following namespace declaration in your BPEL file.

 

' xmlns:f17 = ' http://ENTP.HUD.gov/customxpath/functions "" "

 

USE: f17:replaceString(String,String,String,String) 

Chain change, regular expression, mode [optional] replace the string - 1 = all, 2 = first by default all the 

See documentation for more details.]] >

< / details >

< / feature >

< / soa-xpath-functions >

None of the answers was * exactly * correct, but they gave me enough information to solve the problem.

To implement what I have to code the functions a bit differently.
- BPEL functions are all the IXpathFunction extension classes.
- Mapper functions are not.
- BPEL functions are each separate classes.
- A single class with a method for each desired function mapper functions.
- BPEL classes outcrop in the config file ext-bpel-xpath-functions-config. XML
- The Mapper class is exposed in the config file ext-Mapper-xpath-functions - config.xml
A BPEL class looks like:
```
public class editCaseNumber implements IXPathFunction {
 public Object call(IXPathContext context, List args) throws XPathFunctionException {
 return docOut;
 }
}
```
A class to map looks like:
```
public class mapperFunctions {
 public static String replaceString(String sIn,String sMat,String sRep,String mode){
 return finalString;
 }
 public static XMLDocumentFragment compressFile(String indoc){
 return docOut;
 }
}
```
(I deleted the code of these to avoid confusion.)

My ext-Mapper-xpath-functions file - config.xml looks like:
```
soa-xpath-functions
 xmlns="http://xmlns.oracle.com/soa/config/xpath"
 xmlns:map="http://www.oracle.com/XSL/Transform/java/com.f17.customfunction.mapperFunctions"
 version="11.1.1"
 resourceBundle="oracle.tip.tools.ide.common.resource.IDEMessageBundle"
 >
 
 com.f17.customfunction.mapperFunctions.compressFile
 
 
 
 
 Compresses large strings for DB storage
 
 

 USE: map:compresFile(string)
 


 Returns XML document fragment containing HEX binary string:

 <compressedFile$gt;[outPut]</compressedFile>
 See documentation for details.]]>
 
 
 
 com.f17.customfunction.mapperFunctions.replaceString
 
 
 
 
 
 
 
 Exposes replaceFirst and replaceAll java functions
 
 

 USE: map:replaceString(String,String,String,String)

 String to edit,

 regular expression,

 replacement string mode

 1 = all

 2 = first occurance

 See documentation for details.]]>
 
 
```

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Use of user defined function in mathscript containing a structure

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"

I just noticed that these files appear to be copyrighted. My first question is do you have author permissions to post them in a public forum? If this isn't the case, then you can remove them. That being said, I have reviewed the code and it seems easy enough to work around your problems (provided that you have the copyright permissions). How to bypass the problems is to replace the fields of the struct with variables. There is of course allows you to change some definitions of functions for input and output the necessary variables which I think was the best 5 variables. You will also need to redo the code that uses a table of error checking cell. In total, I estimated about 30 minutes of work. I would have given you work around these files had not been protected by copyright. So, unfortunately, you will need to implement the work around you.

Subvi in an another Subvi data transfer

Hi all

I have a question,

-Does anyone know how it is possible to transfer data as a double of a Subvi to another sub - VI on the same project file with arthemetrical calculations and encodings in the screws.

I don't want to use local or global variables. How to use refnum? Can someone help me?

Thank you

Alan.

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variables of user-defined data transfer

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