How can I intercept the diagnostic interrupt in the user program?

 Hello,

configuring the network and the topology as a (closed) ring it is possible to generate diagnostic interrupt in case a port is disconnected from the ring.

I can find the related alarms in the CPU diagnostic buffer, reporting the profinet port diagnostic address (of course, if I disconnect a cable, I get the diagnostic interrupt from the 2 adjacent ports in the ring).

How can I intercept the diagnostic interrupt in thre user program? I have tried with OB82 85 86 but none of this is working

Pittiplatsch

Hi,

have a look to this entry:

https://support.industry.siemens.com/cs/ww/en/view/57249109

the ET200SP IM HF  supports the following PROFINET IO functions:

●Supported Ethernet services: ping, arp, network diagnostics (SNMP)/MIB-2, LLDP-MIB

and MRP-MIB

●Port diagnostics

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Split from ET 200SP - IM155-6 PN HF Port diagnostic.

A way to detect the ring is broken somewhere is to use this example provided in the attachment.

It works for me I used the above example to get it to work instead of the interrupt.

Using the devicestates function using mode 2 you can read between which devices the link is open in case of the ring failure occurs.

The interrupt on the redundant switch gives a very weird error when a comfort panel is part of the ring and starts or ends with a cable on the switch. The topology will always show red cables.