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Routing MPI/DP

Created by: GoranR at: 3/9/2009 5:44 PM (4 Replies)

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3/9/2009 5:44 PM	Rate (0)
GoranR Posts: 4 Rating: (0)	Hello All, Attached configuration regarding MPI and Profibus DP buses. I wish to go online on CPU nbr 2 from PG/PC. It's not possible to connect PG/PC directly to DP (the subnet is bigger and more complicated than in picture). So my issue: How to go onlinefrom PG/PC->MPI bus->S731x 2DP->DP bus->S731x 2DP? Is it possible with changing HW settings somewhere? BR Goran Attachment Routing MPI_DP.JPG (156 Downloads)
GoranR Posts: 4 Rating: (0)
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3/9/2009 6:19 PM	Rate (0)
UMENCHO Diamond Expert Joined: 3/21/2006 Last visit: 3/2/2023 Posts: 10221 Rating: (1175)	Hello Goran, One question - how is made this profibus connection between both CPUs? Does both CPU is Master or one is slave profibus? regards
	Last edited by: UMENCHO at: 3/9/2009 6:21 PM
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3/10/2009 7:29 AM	Rate (0)
GoranR Posts: 4 Rating: (0)	Nbr 1 (with both MPI and DP connection) is Master, Nbr 2 is slave. BR Goran
GoranR Posts: 4 Rating: (0)
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3/10/2009 7:36 AM	Rate (0)
GoranR Posts: 4 Rating: (0)	But its possible to change Nbr 2 to be a Master too, if it make routing possible. (Task for Nbr 2 is to get a lot of data from a laserscanner and evaulate it and send result to Nbr 1, communication between Nbr 1 and Nbr 2 is 16 byte IN/OUT, Nbr 2 does not communicate with anything else on the bus exept Nbr 1). BR Goran
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3/10/2009 9:18 AM	Rate (0)
UMENCHO Diamond Expert Joined: 3/21/2006 Last visit: 3/2/2023 Posts: 10221 Rating: (1175)	Hello Goran, If both CPU are Master, you must use DP/DP coupler. Then routing is not possible. You'll have access only to the connected CPU. In other case - first CPU is a Profibus Master and second is Profibus Slave. PG will be connected to the Master CPU via MPI. In your picture you didn't asign exactly the type of CPU. For this reason, go to What are the requirements for using the S7 routing function and which modules can you implement? and check if CPU supports routing function. You can use instructions from this link also to build the routing. Fanaly you must "reach" this situation click. I's also possible to connect to the Slave CPU and use it for routing. (more details in S7 routing via PROFIBUS with S7-300 ) Hope this will hepls. regards

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