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| 3/16/2011 5:26 AM | |
Joined: 8/25/2006 Last visit: 5/27/2023 Posts: 2181 Rating:
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Hello. Look at the following linkwhere you could find several examples of CPU master-slave communication on Profibus. |
| 3/17/2011 1:50 AM | |
Joined: 9/27/2006 Last visit: 5/27/2023 Posts: 12022 Rating:
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Hello Tomy; As you are planning to connect 2 CPUs as master and slave over Profibus-DP, you should examine the example configuration shown in the link above, between a S7-300/400 as master and a CPU 315-2DP as slave, with ID:6518822. You will see that there are no FBs involved, only a setup of the exchange data table between the 2 CPUs, using the I/O address area. If you want to exchange the contents of a DB,. then oyu must copy the send-DB data to the output addresses reserved for that purpose in the configuration, and copy the data from the input IO area into your recieve-DB. FBs are required when connecting 2 masters, wuth the use of CP 342-5s. You could look at the following examples of a Profibus (FDL) connectiuon between 2 masters with Send-Recieve functionnality: https://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/profibus/pb_fdl_s7_s7.htm Hope this helps, Daniel Chartier |
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