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speed of K-bus on 317 CPU

Created by: gre_m at: 10/5/2010 6:35 PM (3 Replies)

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10/5/2010 6:35 PM	Rate (0)
gre_m Posts: 947 Rating: (45)	on whatrate exchange CPU317 and CP341 to the bus (K-bus)?
gre_m Posts: 947 Rating: (45)
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10/5/2010 6:52 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (997)	187.5 kBit
IBN-Service Posts: 8946 Rating: (997)
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10/6/2010 9:27 AM	Rate (0)
gre_m Posts: 947 Rating: (45)	187.5 kBit - So slow? Speed Profibus 12Mbod, speed internal bus-187.5Kbod. How strange. Iheard about that speed 10 years ago and thought that it is now higher. Then obtained through the exchange of Ethernet CP343 2 Kbyte be significantly low-water thanProfinet port?
gre_m Posts: 947 Rating: (45)	Last edited by: gre_m at: 10/6/2010 9:28 AM
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10/6/2010 10:24 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 11/28/2023 Posts: 2996 Rating: (1039)	gre_m 187.5 kBit - So slow? Hello gre_m don't worry too much about the "slow" K-bus speed in an S7-300. While it usedfro some communicationsbetween the CPU and CP's, the user data that you read from the CP is actually transfered via the the fast I/O related P-Bus (you'll notice that any CP in an S7-300 occupies 16 bytes of I/O space which is used for this purpose). I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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