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CPU 315-2 DP as a slave

Created by: Brinkmann at: 5/17/2010 11:46 PM (1 Replies)

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5/17/2010 11:46 PM	Rate (0)
Brinkmann Posts: 14 Rating: (1)	Hi, i'm running a CPU 315 as a profibus dp-slave. Because of my configuration i have to use adresses above 127 for my virtual outputs. If i try to write into them with T PAD xxx, it doesn't work. If i use adresses in the PAA below 127, it works. Is there a way to use adresses above 127 ? Thomas
Brinkmann Posts: 14 Rating: (1)
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5/18/2010 1:53 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 6/5/2023 Posts: 2966 Rating: (1025)	Brinkmann Is there a way to use adresses above 127 ? Hello Brinkmann there sure is a way, it does in your case involve using SFC14/15to read/write consistent data from/to the DP Slave. Have a look at the link below which neatly collates all "consistent data" entriesfor moreon this subject: Which entries deal with consistent data in conjunction with distributed I/O? Alternatively, change the setup of each of the 16 Word longI/O Modules from "Consistent over: Module" to"Consistent over: Unit"andthe "TPQ(A)W" should do the job (without the need for SFC 14/15, note that you data consitency is now only guaranteed for each Word by itself rather than the whole module). 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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