12/5/2016 2:08 AM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2684) |
Hello abuzr; Q1: To my knowledge, you cannot connect 2 Profibus-DP masters without adding some form of hardware. -If you want to keep master-slave configurations, you would need a DP/DP coupler. This is a unit with 2 distinct Profibus slave interfaces, that you configure as a slave to each of the masters, on its own bus. The trick is that, inside the coupler, Profibus outputs from Master 1 become inputs to Master 2, and outputs from master 2 become inputs to Master 1. Easy to setup, easy to configure, and no programming is required. However, you are limited to a slave's data exchange, 244 Bytes OUT/IN. See the DP/DP Coupler manual: https://support.industry.siemens.com/cs/ww/en/view/1179382 -if you want master-master acyclic exchanges, then you need a CP 342-5 in each DP-Master's PLC rack. See these FAQs for examples of different acyclic communication functions: - BSend/BRecv: https://support.industry.siemens.com/cs/ww/en/view/18516182 -USend/URecv: https://support.industry.siemens.com/cs/ww/en/view/18516417 Q2: For your KP1200, you should have WinCC Comfort. It has both Profibus/MPI and Ethernet interfaces. In the networking tabs you should find the Profibus configuration, and the online help should provide basic settings. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 12/13/2016 6:14:52 PM |
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12/13/2016 11:29 AM | |
Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating: (1054) |
hi, Daniel is right. There is no communication possible over Profibus without additional devices. You need a DP/DP-coupler or a CP342-5. See this manual, which open always at first when there is a question of CPU/CPU communication: CPU-CPU Communication with SIMATIC Controllers on page 132 there is a selection aid for two S7-300 over Profibus. hope this helps, regards, |
FCK WAR! |
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2/13/2017 10:14 AM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by KyawHS is split to a separate thread with the subject Profibus communication, SF and BF1 Faults light show. Best regards |
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