About Thorsten_Brach

@ZYYZZZ1:  Why do you not simply use a reference to the OpconUnit (base class of all units) itself ? VAR_INPUT   rUnit : REFERENCE TO OpconUnit; END_VAR -------------------------------------------------------- IF ( __isValidRef (rUnit)) THEN   rUnit.SetEvent( OpconEventClass := OpconEventClass.ERROR, Number := -1 , AddText := '', Lock := FALSE); END_IF ... View more

That looks strange... What the problem is, the dialog shows - the access to the "Wzwiia0V.DLL" is denied - but I do not understand why this DLL is accessed ? Are there any own developed objects or addons, in whose export / HMI-forms  this DLL is accessed ? Or is there a pre-export or a post-export script that is executed ? This DLL is nothing what comes from Nexeed and the DLL call must be something what is added in the project... Have you ever searched the project files with a tool like AgentRansack, whether there is somewhere the DLL call to be found ? If you take a closer look at the exception, then there is a reference to Bosch.OpCon.Engineering.ControlSystems.HmiSfcExport, so that I assume that it must have something to do with the HMI export ...       ... View more

The SerialDataStream object simply transfers a ByteStream via the serial interface Which data is included in the ByteStream - does not matter for the object. If you want to transfer ModBus RTU over it, then you have to assemble the ModBus RTU protocol yourself in the PLC and put it into the ByteStream... https://www.modbus.org/docs/PI_MBUS_300.pdf If you use a Beckhoff controller, it would probably be less effort to simply use the TF6255 package and program it natively ( there are currently no Nexeed objects available for it ) https://www.beckhoff.com/de-de/produkte/automation/twincat/tfxxxx-twincat-3-functions/tf6xxx-connectivity/tf6255.html   ... View more