Hello.

I'm interfacing Tia Openness (Siemens.Engineering.dll) via Pythonnet.

I'm trying to modify watchdog factor of an IO connector.

I can get its value but I can't set it, and it dispose my TIA instance with a NonRecoverableException, I can set PnUpdateTimeAutoCalculation's value, but not watchdog factor.

Here the code and its output : 

DDD=myproject.Devices[4].DeviceItems[1].DeviceItems[1]

print(DDD.Name,"\n")

IOConnector=tia.IEngineeringServiceProvider(DDD).GetService[hwf.NetworkInterface]().IoConnectors[0]

print(IOConnector.GetAttribute("ConnectedToIoSystem"))

print(IOConnector.GetAttribute("PnDeviceNumber"))

print(IOConnector.GetAttribute("PnUpdateTime"))

print(IOConnector.GetAttribute("PnUpdateTimeAutoCalculation"))

print(IOConnector.GetAttribute("PnWatchdogFactor"))

print(IOConnector.GetAttribute("PnWatchdogTime"))

print(type(IOConnector))

IOConnector.SetAttribute("PnUpdateTimeAutoCalculation",False)

IOConnector.SetAttribute("PnWatchdogFactor",111)

Output:

PROFINET interface

Siemens.Engineering.HW.IoSystem

2

2000000

True

3

6000000

<class 'Siemens.Engineering.HW.IoConnector'>

<class 'Siemens.Engineering.HW.Features.NetworkInterface'>

---------------------------------------------------------------------------

NonRecoverableExceptionTraceback (most recent call last)~\AppData\Local\Temp\ipykernel_17372\1039542653.pyin

    14 print(type(tia.IEngineeringServiceProvider(DDD).GetService[hwf.NetworkInterface]()))

    15 IOConnector.SetAttribute("PnUpdateTimeAutoCalculation",False)

---> 16 IOConnector.SetAttribute("PnWatchdogFactor",111)

NonRecoverableException: Unexpected exception.

Object name: 'Siemens.Engineering.HW.IoConnector'.

à Siemens.Engineering.Private.Session.Siemens.Engineering.Private.IObjectSession.SetAttribute[TC](LifetimeContractHandle`1 lifetimeContractHandle, String attributeName, Object attributeValue, String fullName)

à Siemens.Engineering.Private.InternalObject_Access`2.SetAttribute(String name, Object value)

Anyone knows the cause ?

Thanks in advance.

Regards.

Traveleur3