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SIMATIC S7

S7 300 vs S7 400

Thread Starter: hariszet   Started: 5/4/2012 11:43 AM   Replies: 8

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  5/4/2012, 11:43 AM
hariszet
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Hi all

would you please give me information about :
what is different between S7 300 and S7 400.
thanks fo all
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  5/4/2012, 12:19 PM
Amit_86
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hariszet wrote:
Hi all

would you please give me information about :
what is different between S7 300 and S7 400.
thanks fo all


Hello,

Look at this old discussion on Same Topic>>>S7400
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  5/4/2012, 2:16 PM
IBN-Service
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hariszet wrote:
Hi all

would you please give me information about :
what is different between S7 300 and S7 400.
thanks fo all


Short:

S7-300: small, cheap, high medium and high performance

S7-400: large, expensive, high and very high performance
Industrieautomation: Softwareerstellung und Inbetriebnahme weltweit.
http://www.ibn-service.com
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  5/4/2012, 6:54 PM
gre_m
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S7-300 not work without flash (MMC). MMC has low cost as flash eeprom s7-400, but s7-400 can work without external load memory card, s7-400 has more advanced means of communication, a better operating system. SFB Ar send and sfb sending message, 4 accumulator in CPU, 12mbod K-bus and MPI, multiprocessor (up 4 in rack), support hot insert|remove (OB83)
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Thank you for this post from:
ensark2, hdhosseini
  5/6/2012, 10:50 AM
ensark2
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gre_m gave you some very good differences between S7-300 and S7-400

You should first see what are your needs and then decide
which one to use. It is always best practice for me.




=== Edited by ensark2 @ 5/6/2012 2:10 PM [GMT ] ===


=== Edited by ensark2 @ 5/6/2012 2:10 PM [GMT ] ===
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  5/6/2012, 11:32 AM
Prats
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one more difference...the 400 CPU back plane is Parallel in 300 it is serial...Also the new CPU in 300 ie 319 matches speed of  S7 400
Regards,
Prats
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  5/7/2012, 10:21 AM
Elonen
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You can create larger programs with S7 400, as it has more local memory, and if necessary, you can allocate the local memory from hardware configuration according to your needs.
If you run out of local memory (reach maximum nesting depth) in S7 300, your only chance is to alter program infrastructure, to optimize it. With S7 400, it's easier to adjust memory settings.
(Last week, I ran out of memory on a S7 400, when adding more code to an old program. If the logic had been an S7 300, it would have taken quite some time to rewrite the code, to use less resources. But now as the logic was S7 400, I simply increased local memory for priority 1).
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  5/7/2012, 10:35 AM
Eastern
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Hello,
        Pls. check attached ppt. perhaps will help to understand more about s7 cpu.

Attachment: ePRO1_17_400er.zip  (85 Downloads)
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  6/7/2012, 11:22 AM
DaveA
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The S7-300 series has a wide range of CPU sizes/speeds to suit most needs and is more commonly used. Would recommend this for most applications. 

The S7-400 series is more powerful and used for a much larger system, it is used in crucial environments, for example you can hot swap cards etc. The S7-400 can be an expensive overkill if used unnecessary. 
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