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Dual redundancy using s7 300 (315-2dp) PLC

Created by: rahilansari at: 1/12/2012 12:52 PM (2 Replies)

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1/12/2012 12:52 PM	Rate (0)
rahilansari Posts: 54 Rating: (0)	Hi all Hope you all doing well in 2012. Will anyone please tell me whether Dual Redundancy can be achieved using s7 300 plc.If Yes then; 1.Do we need to do any programming.(please give some information what kind of programming actually needed here.) 2.Difference between hot standby and dual redundancy. Hope i'll get a very useful help as always. Thanks Rahil
rahilansari Posts: 54 Rating: (0)
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1/12/2012 4:26 PM	Rate (1)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/16/2024 Posts: 12282 Rating: (2683)	Hello rahilansari; "Dual redundancy" is a term generally used when speaking of ESD (Emergency Shutdown) systems, or SIL 3 applications. These can be implemented in the S7-300 familyby using S7-31xF-2DP CPUs, the "F" designating a Fail-safe application PLC, a package called "Distributerd Safety". Have a look at how Wikipedia defines Dual-redundant systems: http://en.wikipedia.org/wiki/Dual_modular_redundant And here is a link showing detailsof F-CPUs and Safety systems in Siemens' selection:: SIMATIC Industrial Software Safety Engineering in SIMATIC S7 Hot-redundancy, on the other hand, refers to CPU systems that are designed with high-availability, generally with 2 CPUs using a very fast link to update the program wiorking on a main CPU to a standby CPU that can take over with a very short delay (in the order of mseconds) when the main CPU fails. In Siemens' world this can be otained only in S7-400H systems, the "H" refering to High-Availability. S7-300 CPUs can only attain warm-redundant status (switchover time is measured in seconds, so there is a noticeable delay in transfer from main to standby) using apackage called Software Redundancy. And yes there is a lot of programming/configuring to be done by the user in order for this Software Redundancy program to work.Here is a link to the manual for this program: SIMATIC S7-300/S7-400 Software redundancy for SIMATIC S7 Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 1/12/2012 6:28 PM
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10/30/2017 7:10 AM	Rate (0)
Jen_Moderator Diamond Member Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (171)	New question published by db12@ is split to a separate thread with the subject CPU315-2DP Redundancy with cp342-5, to SWR way. Best regards Jen_Moderator

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