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A major difference is that the functions to store configuration parameters permanently in flash memory are no longer supported on NIC 52 devices.
This has been changed to save the limited number of write cycles on the flash memory, thus preventing device defects.
So now after each reset of the netIC the configuration parameters are taken from the flash memory. We therefore recommend to create a fixed basic configuration using the NetX Configuration Tool and configure everything else during startup via the configuration register via Modbus.
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Different Behavior of STA-LED
There is a different behavior of STA-LED of NIC52-RE and NIC50-RE when a PROFINET Diagnosis is reported:
If a PROFINET diagnosis is reported to the PROFINET IO Device protocol stack running on the NIC52-RE via the packet PNS_IF_ADD_CHANNEL_DIAG_REQ, the STA-LED remains on until a hardware reset occurs. This behavior is contrary to that of the NIC50-RE where the STA-LED will not react to a PNS_IF_ADD_CHANNEL_DIAG_REQ packet. The behavior of the NIC52-RE is intended and correct. Other Hilscher PROFINET Devices operate in the same way. Sending an appropriate PNS_IF_REMOVE_DIAG_REQ packet will switch off the STA-LED.
However, although being incorrect, the behavior of the NIC50-RE will not be changed in the near future.