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In this example the application activate activates the Profinet indications. For that the application need to call the request "Register Application".
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5. Indication/PacketHandler
The PacketHanlder PacketHandler needs to read the mailbox and check it for new packets (for example indications). If a new packet is available the application shall check the command in the header of the pcket packet and implement a switch case. ALL profinet indication like here the PNS_IF_PARAM_END_IND shall be implemented in the switch case:
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Take care, that the length value for the response is not allways always sizeof(data). Check carefully the profinet documentation an sometimes the length value is
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For profinet indications this default answer can we wrong, but it is better as no response.
6. When does the application need to
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implement an indication
There is no general answer, because this need to be checked for every application. Many indications can be seen as informations for the application and only a response is necessary.
But some indications need a implentation implementation in the application. For example if the application change the stack behavior with ptSetConfig→ulSystemFlags, than it make is necessay necessary to implement indications.
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