S7-300 PLCs and CP 343-1 BACnet 6FL4343-1CX10-0XE0

Good morning,



a client has requested me a communication between 4 Siemens S7-300 PLCs and a BACnet Network, and there is very little information(almost null).


The CP 343-1BACnet (CP 343-1 BACnet 6FL4343-1CX10-0XE0) is a communications processor used to connect the SIMATIC S7-300 to Industrial Ethernet; In addition, with the help of the BACnet protocol, it also allows systems to be integrated that are compatible with that protocol.

As information I can say the following, BACnet (Building Automation and Control Networks) is a communication protocol for building automation and regulation data networks developed by ASHRAE (American Society of Heating, Refrigeration and Air
Conditioning Engineers Inc.).

This protocol is suitable for both the management and automation levels and is recognized as an ANSI, CEN and ISO standard.

The gateways allow communication between two networks that use different communication protocols, therefore the task would be to create a communication between an S7-300 PLC and a BACnet gateway (Scada) through the PROFINET interface of the CPU. The objective to investigate is which gateway is suitable for this and how the configuration is made between the S7-300 PLC and the gateway. For example, if the Data Exchange is cyclic or acyclic.

Someone has worked with this protocol and can send the information and an example of how to make the communication.



Thank you

Hi, I have been working with gateways and BACnet for a few projects the last 2 years with air handling units. The customer specified an RTA gateway. Real Time Automation. They are easy to set up and the software is free. You can assign them an IP address and import/export tags from them to other gateways. Easily recognized by the JACE controller and the Niagara software used in BACnet.
I do not work for Real Time Automation. I work for a controls integrator. Hope this helps.