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S7-1500H and ET200SP

Created by: Mitja78 at: 10/10/2023 1:21 PM (5 Replies)

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10/10/2023 1:21 PM	Rate (0)
Mitja78 Member Joined: 3/14/2022 Last visit: 9/11/2025 Posts: 12 Rating: (1)	Hi all! I have a question about the redundant system. Now we use conventional S7-1500 PLCs and ET200SP (6ES7 155-6AU01-0BN0) remote stations. We have to transfer data between controllers. There is an idea to replace these three PLCs with a redundant one, so that if one CPU malfunctions, control passes to the other. Is it possible to do this without changing remote stations? Thank you in advance

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10/12/2023 10:55 AM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	Hi, There is already S7-1500R/H system available. Have you already taken a look at this manual? SIMATIC S7-1500 S7-1500R/H redundant system
	Denilson Pegaia Siemens Industry Sector Technical Support
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10/12/2023 1:04 PM	Rate (0)
Mitja78 Member Joined: 3/14/2022 Last visit: 9/11/2025 Posts: 12 Rating: (1)	If I choose a PLC S7-1517H and use it with installed remote stations ET200S, will this system work in redundant mode?

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10/13/2023 10:58 AM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	yes, that's what we expect
	Denilson Pegaia Siemens Industry Sector Technical Support
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10/17/2023 8:09 AM	Rate (0)
Mitja78 Member Joined: 3/14/2022 Last visit: 9/11/2025 Posts: 12 Rating: (1)	But wouldn't such a configuration work in R1 mode? And only one PLC will have access to a specific remote station?
	Last edited by: Mitja78 at: 10/17/2023 08:10:07
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10/17/2023 10:35 AM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	In the manual I referred to, in the 4.3.2 Redundancy stays: " You can use the following IO devices on the redundant S7-1500R/H system: • IO devices with system redundancy S2 • IO devices with system redundancy R1 (only S7-1500H as of FW version V3.0) • Standard IO devices over the "Switched S1 device" function of the CPU The System redundancy S2, R1 tolerates errors in the direct IO controller and IO device communication. With a switched S1 device, an interruption of the IO controller and IO device communication is not tolerated. The S1 device fails temporarily and is then resumed if necessary." Both CPU works as a pair. I suggest you take a look at the chapter 4 (System overview) to get a general knowhow of the system and " take a leaf" in the chapter 5 to see the fails situations and the redundancy reaction.
	Denilson Pegaia Siemens Industry Sector Technical Support
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