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03/12/2020
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Hello, unpaid intern here trying to collect data.
I have to read multiple values coming from a plc, and I have to do it through a hardly documented thirdparty webportal.
I have recieved a pdf with documentation from the PLC running the OPC-UA sever. I have name spaces, identifier types, and identifiers.
I think I need to format the variable ID like so:
ns=4;s=P_OPC_UA.weight
but the weight node appears to be an array of stuff, 0-6 values. Do I just add a [] at the end after weight;
ns=4;s=P_OPC_UA.weight[4]
like so?
05/30/2017
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NodeIds are structures – not strings. Any string format depends on the s/w doing the parsing.
That said ‘ns=4;s=P_OPC_UA.weight’ is a UA defined syntax.
If the value is an array there is a separate parameter called IndexRange which is a comma separated list of ranges.
i.e. 2:3,4:5,2:3
where there is 1 entry in the list for each dimension in the array.
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