ErrorID 80C4 or the MQTT connection simply drops

Hi 

   Thank you for your application which I have set up and almost got fully working. I can connect to the MQTT broker and publish messages with no problems. However when I subscribe to a topic the system will receive 1 or 2 message and then after a random period error. The error is sometimes signalled with a ErrorID 80C4  or no error ID the MQTT connection simply drops. Any ideas

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Split from MQTT Client Application Example for SIMATIC S7-1500.

• The connection cannot be established at this time.
• The interface is receiving new parameters or the connection is being established.
• The configured connection is being removed by a "TDISCON" instruction.
• The connection used is being terminated by a call with COM_RST = 1.

Hi elidag99,

Just for my curiosity. did you solve problem witch error 80C4? Im facing the same error.. 

thank you

Jarda

Hello there, I am using application example of MQTT in s7-1214 DC/DC/DC by Yu-Wen. I have tried both the backup of s7-1500 and s7-1200. For S7-1500 I've tried with PLCSIM Advance 3.0 and find same error with local mosquitto broker as well as online mosquitto broker running at test.mosquitto.org. I have hardware s71200 1214C DC/DC/DC,  so I have tried application example of s7-1217 and changed hardware with 1214C and downloaded backup to the hardware. I have attached screenshot of WinCC simulation running in PC connected to PLC. It shows same error with online as well as local broker. In my all testing I've used 1883 port, So I don't need any extra certificate. Do I??

I always receive error code 80A1 in MQTT client and 80C4 in TRCV.

Kindly help me with this issue!!

Hey Umang 

Hope you doing well in COVID-19.

I am using LMQTT library from siemens and also facing the same problem. and getting 80C4 Error From TRCV Block. Kindly Update me if u got a solution

Regards

Pranav Panchal