6/10/2022 8:01 AM | |
Joined: 4/28/2015 Last visit: 6/12/2023 Posts: 5 Rating: (0) |
Hi all! An S7-400H (redundant PLC!) has to communicate with an S7-1500 station (S7-1515-2PN with CP1542-5) via Profibus DP. The 400H should be the master and the 1500 the slave. The idea is to realize the communication as I slave communication. The 400H is connected to a Profibus Y-link in order to connect the two Profibus lines from the 400H to the single line of the CP1542-5. Please see attached drawing. I know how to configure the I slave communication and have done it with single PLC's non redundant. My question, is this also possible with the 400H? I cannot test anything right now as the hardware and the commissioning will be in a few months but of course I want to be sure in advance if the hardware is able to do this. Another idea of our customer is to put a DP/DP coupler in between the Y-link and the CP1542-5. I am unsure how that could work. Thanks in advance for any comment! BR, Michael AttachmentProfibus DP Communication between 410H and CP1542-5_option 2.pdf (440 Downloads) |
6/10/2022 12:42 PM | |
Joined: 8/12/2021 Last visit: 4/16/2024 Posts: 303 Rating: (28) |
Hi Michael Pantoja! I am not sure if this combination can be realised. You may be helped by the generic Profibus manual. There is a FAQ that explains the possible combinations in a Profinet network, in case it helps. |
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6/12/2022 5:06 AM | |
Joined: 10/7/2005 Last visit: 4/28/2024 Posts: 3004 Rating: (1046)
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Hi Micheal while I can't offer any hands-on experience with what you are planning on doing, I'd say you should be right. It is certainly possible to connect S7-300's and 400's as DP Slaves via a Y-Link to an S7-400-H system. Key to success in those cases is to disable the "Test, commissioning, routing" option. Reason being is that this tick mark allows to CPU to be a DP Slave as well as DP Master and you can only operate "pure" DP Slaves behind a Y-Link. I suspect - but haven't checked - that a 1500 and/or its CP or CM module will have a similar tick mark too somewhere when configured as a DP Slave. Have a look at THIS, THIS and THIS FAQ too for more on this subject. |
Last edited by: fritz at: 06/12/2022 05:07:27Cheers |
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