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| 4/12/2012 4:06 PM | |
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Posts: 94 Rating:
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My I/O count is 2500. I want to know that can I go for CPU-315-2DP.Waiting for your valuable reply. |
| 4/12/2012 4:40 PM | |
Joined: 9/27/2006 Last visit: 9/10/2024 Posts: 12282 Rating:
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Hello Arun; First, there have been many models of CPU 315-2DP over the years, and each has some variation in the number of channels, memoryand I/O supported. Thios page from the Siemens Industry Mall (electronic catalog) will give you details for modelnumber 6ES7315-2AH14-0AB0: https://eb.automation.siemens.com/goos/catalog/Pages/ProductData.aspx?nodeID=10012935&catalogRegion=GB&language=en&activetab=product®ionUrl=/uk#topAnch Are these I/Os all digital, or are there also analog cjhannels to be used in your project? Please give more details, it would be useful to give you a more complete answer.. For example the CPU 315-2DP can support over 16000 digital signals (see the link above), but only 128 byte (1024 signals) of I/O in central mounting (in the main Rack + extenssions). The rest must be read in as Profibus-DP slaves, mounted in a ET 200M for example. Also we would need to know what kind of application you are planning, how fast you expect the system to respond (maximun scan time), tell us if any communications are expected to other systems (SCADA, Historian, other PLCs) and if any HMI panels are to be integrated to the PLC. This should give us a better picture in oreder to help you out. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 4/13/2012 1:14 AM |
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| 4/14/2012 2:22 AM | |
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Joined: 9/27/2006 Last visit: 9/10/2024 Posts: 12282 Rating:
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Hello Arun; Water treatment plants generally do not need high-speed applications, so i am confident a CPU 315-2DP could provide you with the processing power you will need, especially if you plan on using Profibus-DP remote IO stations to distribute the controls.. But just in case you want more reassuring, you might look the web for typical application data from different users. I found these: http://www.atasel.com.tr/atasel/projects2.htm http://books.google.ca/books?id=IvpQQ9Hmd5QC&pg=PA479&lpg=PA479&dq=S7-300+water+treatment&source=bl&ots=z4utrcwNOC&sig=BvCzT2y4kJYq2KyQgSitWxx2aLs&hl=en&sa=X&ei=8r6IT8SPC-jz0gH20piACg&sqi=2&ved=0CFwQ6AEwBQ#v=onepage&q=S7-300%20water%20treatment&f=false |
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| 4/14/2012 6:00 AM | |
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Posts: 94 Rating:
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Thank you very much... |
| 4/14/2012 1:37 PM | |
Joined: 10/7/2005 Last visit: 9/12/2024 Posts: 3020 Rating:
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Hello Arunraje Based on gut feeling (and a bit of experience), Iconcur with Daniel and say that a modern (firmware V3 based) 315 CPU will do the job. If you want to err on the safe side, a 317 should eat the application aliveas they say. Having said that, Siemensdoes promote a 400 based PCS7system for this type of application and who am I to argue with that. Should this interest you, you'll find more application specific info from Siemens at the link below: Consultant DVD for the Water and WastewaterIndustry I hope this helps |
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Cheers |
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