8/11/2023 9:03 PM | |
Joined: 9/27/2006 Last visit: 10/17/2024 Posts: 12289 Rating: (2687)
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Hello Antony; The following article shows you exactly the steps you need to follow so that your S7-400 CPU can be added to the external master's configuration software s a DP slave. https://support.industry.siemens.com/cs/ca/en/view/13091565 One step that is often missed by unexperienced programmers is that when you do the configuration in the external master's softwre, the inputs you configured in the S7-400 MS (master-slave configuration) must be inverted. That is, your S7-400 Profibus-DP I/O starts with 3 Input sections of 32 bytes each, then 3 sections of 32 bytes output. In your externl master, when you want to configure the S7-400 as a DP slave, you must start with 3 sections of 32 bytes output, then 3 sections of 32 bytes input. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 08/11/2023 21:22:49 |
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