S7-SoftPLC:S7-SoftPLC Service and TwinCat

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Dependency on TwinCAT-IO for S7-SoftPLC service

If the S7-SoftPLC is started as service and uses the TwinCAT-IO-driver, it may happen that the S7-SoftPLC is loaded prior to TwinCAT-IO and therefore can't use the IO-driver. The PLC stops and must be restarted manual.

To prevent this, the service must have a dependency on TwinCAT-IO.

Therefore open the regedit and add the value "TwinCAT System Service" to the key "DependOnService" located at

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CPUS7

The service will now be started, after the service "TwinCAT System Service" is running.

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