There is a relevant answer in the support center of Siemens official website's answer system, because there are two characters in the link "AD", can not give. (PS: Baidu you can not be a little smarter, AD is not necessarily an advertisement, AD = Automation and Drives)
You can go to the Siemens website to search again.
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The following information comes from Siemens > Support Center> Find Answers.com Mouser:
Atlas offers at least two types of communication:
1, communication through Profibus, choose Combox P device, it communicates with 6 air compressors, s7 300 only need to communicate with Combox P. The GSD file is provided by Alfonso. The communication mode and address corresponds to the description provided by the party. modbus is also similar to this.
2. To communicate via Ethernet, select the Combox E device, which communicates with 6 air compressors, and the S7 300 only needs to communicate with the Combox E. The S7 300 provides the communication instructions. The S7 300 only needs to communicate with the Combox E. The communication instructions will be provided by Alfonso.
The above station design will be done by Alfonso, or it can be realized by Alfonso by purchasing it.