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Writing a single value of an array

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Writing a single value of an array

April 13, 2014
21:57, EEST

maxdo

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Hi,
How can I write a single value of an array containing float values with writeValue() or writeAttribute()?
Thanks

April 14, 2014
7:16, EEST

Jouni Aro

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Unfortunately, that’s not currently possible, but you need to use write like this

NumericRange indexRange = new NumericRange(1); // Your array index(es) here
final WriteValue[] writeValues = { new WriteValue(nodeId, Attributes.Value,
indexRange.toString(), new DataValue(new Variant(value))) };
final WriteResponse response = client.write(writeValues);
final StatusCode result = response.getResults()[0];

We will need to introduce a new overload for writeValue() to enable specifying the range as well.

April 15, 2014
21:56, EEST

maxdo

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Sorry, but I always get StatusCode: Bad_IndexRangeInvalid (0x80360000) “The syntax of the index range parameter is invalid.”
I tested it with SampleConsoleServer / Client, trying to write a value of the “Int16Array” in “StaticArrayVariables”.
Thanks

April 16, 2014
14:11, EEST

Jouni Aro

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How do you specify the range? We have been updating the NumericRange class recently, so you can also contact our support to test with the latest version (I also added new overload methods as mentioned to the SDK 2.0 beta already).

April 18, 2014
9:31, EEST

maxdo

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I tested it with your code snippet. Also tried it with different directly set String parameters in WriteValue(): “1:-1” (which equals NumericRange(1) ) , “1:1”, etc.
What is the correct syntax? SDK version is 1.9.1.

April 18, 2014
14:18, EEST

Jouni Aro

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The correct string format is “1”

April 23, 2014
11:12, EEST

maxdo

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This way it works. “value” has to be formatted as array element…
Thanks!

June 26, 2014
16:02, EEST

gjevremovic

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Hi,
is it possible in this way to write single element of for example 2-dimesional array of simple type. I can’t figure out how to do that with NumericRange.
Or it is simplier to get the array, change the desired element of it and write the array back?
BR,
Goran

June 27, 2014
7:25, EEST

Jouni Aro

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Yes, it is possible, if the server also supports that. You will need the new SDK 1.5 (or 2.0 beta) for that, though. NumericRange was extended to support multiple dimensions just recently.

June 27, 2014
13:23, EEST

gjevremovic

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Hi Aro,
do you mean if server supports legacy mode for arrays?
Thnks

June 27, 2014
13:37, EEST

Jouni Aro

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I mean if the server supports multidimensional arrays and NumericRange. It should, of course, but we just added support for the Java stack, and I am not sure about all other servers.

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