Hello, i wanted to give an update. The 'Program loaded - EXCEPTION' watchdog error was triggered by using a 4G router. it seems that the DNS from the AWS broker is not accepted by the DNS server. Choosing an alternative DNS server is not possible for a 4G router. So we continued on our own company network. After this, the watchdog error was resolved. With the help of CodeSyS we found the problem for the 'TCP_INIT_ERROR'. The 'TCP_INIT_ERROR' occurred because we removed and reinstalled the signed certificate from AWS on the core. We did this because it was installed twice. When the CSR file is generated, then a key pair (Private/Public) is generated on the PLC. From the CSR file a signed certificate is generated by AWS. If the certificate is deleted, then the key pair on the PLC is also deleted and no connection can be established even when the certificate is imported again. In this case a new CSR file has to be created and the signed certificate has to be imported again.
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