Configuring an optional Profinet device in the project - How To??

Hi,

I want to configure a Profinet based inverter in a project that may not be installed in the first stages of the project?

If you do this, there will be an error flashing because of the missing device. Is there a way to suppress this error and activate the inverter at a later stage WITHOUT using TIA Portal? Just by installing it and triggering some code in the PLC... For example by triggering an FB that enables the error checking for that newly installed inverter??

Any input is appreciated.

best regards,

Hans

Hello Hans;

The standard way ot decoupling a Profibus slave or a Profinet IO device from the bus (in TIA Portal) is the instruction D_ACT_DP:

How do you enable and disable DP slaves and IO devices using the "D_ACT_DP" instruction?

You use D_ACT_DP to make sure that the missing or defective node is not interrogated on the bus, so no error code is generated, no diagnostic OB is launched,

However, to reintegrate the node in the bus you need to recall D_ACT_DP a second time.You could prepare a function in your program that would call D_ACT_DP (with adequate parameters) under the right conditions, to reintegrate the missing node  without having to connect to the CPU with TIA Portal. You would need an external signal to launch that function, I leave that to your imagination.

Hope this helps,

Daniel Chartier

This helps a lot..

Cheers!