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OPC client with Lazarus

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denny.chou:

--- Quote from: avra on November 23, 2021, 10:26:18 pm ---
Normally not, but there are OPC-UA to OPC-DA gateways which allow that.

For direct OPC-DA access you can use something like this: https://github.com/seryal/OPCComponent

--- End quote ---

Thank you for your valuable response

denny.chou:
"For direct OPC-DA access you can use something like this: https://github.com/seryal/OPCComponent"

What should I do if such an error message appears when installing this component? thanks´╝ü

OPCtypes.pas(37,69) Error: Data element too large

avra:

--- Quote from: denny.chou on November 24, 2021, 06:57:33 am ---What should I do if such an error message appears when installing this component?
--- End quote ---
Contact author or open a github issue? I haven't used that coponent for a while, so maybe trying older Lazarus like 2.0.x might be worth trying.

denny.chou:

--- Quote from: avra on November 24, 2021, 09:14:46 am ---Contact author or open a github issue? I haven't used that coponent for a while, so maybe trying older Lazarus like 2.0.x might be worth trying.

--- End quote ---

Thank you very much for your suggestion. The author has assisted with this issue.

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