Hello, let me explain my situation, I have a plc s7-317-2dp as master firmware v3.3with CP43-1 programmed with step7 5.6 and I have 9 s7-1214 slaves and 3 s7-1211 slaves programmed by Tia portal V16.

we already send a db of 7000 bytes to the servers by a frame using AG-send and receive information on a db of 2000 bytes using AG-receive.

Now we want to do an MQTT communication with the server and I have the following questions:

possible to communicate in MQTT by s7-317 in step7 5.6?

Is it necessary to invest and buy new equipment?

possible to send and receive a whole db by MQTT protocol?

Are there any links or videos to help me?

Thank you for your usual support.

Hello,

maybe the answers in the following topic will be helpful for you:
MQTT protocol with CPU314C-2DP and CPU315-2DP

Please note that nobody is obliged to answer. If you want an official answer, you need to start a SR.