When the c# OPC client accesses the OPC server, there are errors in OPC writing
these errors are the errors I have experienced. Record them
environment
PLC: S7-200 PC access smart
DLL: register and reference opcdaauto.dll
Language: c#
implementation function: read and write PLC through OPC
System error
Tran:2009 CH:0 Error:-1073446906
resolvent
PLC forgot to power on, just power on 😂
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