client.Write method is not working for me about libua HOT 8 CLOSED

This error corresponds to the enum for BadTypeMismatch. Might need unsigned int, long, a float or a double depending on the type of the node. Check the data type for the node on the server.

Closing, not a library issue.

from libua.

I have created another node of type int and just to assigning value 6, but still not writing value to node, where as when tried with OPC UA client then it is writing the value

This is the code snippet

uint[] respStatuses;
//client.SetPublishingMode(true);
client.Write(new WriteValue[]
{
new WriteValue(
new NodeId(2, "SiemensPLCs.PLC1500.HMI.Station_Status[2]"), NodeAttribute.Value,
null, new DataValue(6, StatusCode.GoodClamped, DateTime.Now))
}, out respStatuses);

Now status code is "2155020288"

Screenshot of OPC UA client

from libua.

This error corresponds to the enum for BadTypeMismatch. Might need unsigned int, long, a float or a double depending on the type of the node. Check the data type for the node on the server.

Closing, not a library issue.

Hello Nauful, thank you for the response.
I have double verified the data type and value assigned but still facing issue. please check my comment with more details

from libua.

The UA data type is Word, which in C# is ushort. Sending 6 as a constant is an int (Int32 for UA) Try declaring a variable with that type specified:

ushort value = 6u;
... new DataValue(value, ...)

from libua.

I have tried with suggested code, still not changing the value, please refer the below screenshot

I'm able to change the value through OPC quick client but not with code. I have tried various types and values but "write" method is not working at all

from libua.

Try StatusCode.Good instead of StatusCode.GoodClamped. If that doesn't work, I need more info:

With an unencrypted connection (security None or Sign but not SignAndEncrypt), can you take a Wireshark capture of writing the value from your OPC client, then of writing your value from this test app?

from libua.

Finally it worked with below code snippet

ushort val = (ushort)6u;
uint[] respStatuses;

client.Write(new WriteValue[]
{
new WriteValue(
new NodeId(2, "SiemensPLCs.PLC1500.HMI.Station_Status[2]"), NodeAttribute.Value,
null, new DataValue(val))
}, out respStatuses);

Declare the variable and then pass that variable to DataValue object.
Note:- Just pass that value only and don't pass other parameters to DataValue object,

from libua.

Sounds good. Your server may have been rejecting the additional parameters.

from libua.