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7/31/2009 1:43 PM | |
Joined: 10/7/2005 Last visit: 6/6/2023 Posts: 2966 Rating:
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Hello Raheel I think mumbles misread the part numberand thought it is a"DCS 800" (which is an ABB drive and in thiscase his advise would have been correct, ABB's naming convention is a rather confusing one). Anyhow, I can see a couple of options for you to link theABB 800xA DCS with your S7 via Profibus. 1.) Add a Profibus DP Master module to the ABB DCS (should it not already have one, this LINK has some more info on the Profibus capability of the ABB DCS). Obtain the GSD file foryour particular S7 CPU fromHEREand configure the S7 CPU as a DP Slave in the Master configuration of your ABB DCS. You S7 CPU will now become a so called I-Slave (intelligent DP Slave). Have a look at thesetwo linkswhich explain the general setup principle of this quite well (it doesn't matter if theDP master is an S7 or ABB DCS or something else, the principle is the same). Master-slave connection between two CPUs in different projects DP link between CPU 315-2DP (slave) and S7-400 (master) 2.) Should your S7 CPU already have DP Slaves connected to itsDP port (which means the S7 is a DP Master too) OR you generally rather go down this path, you can use a so called "DP/DP coupler" as the link between the two DP Masters (ABB DCS and S7 CPU). Have a search for "DP/DP coupler" in this forum and the service and support web and you'll find plenty of examples, FAQ's and the manual to help you with this. Going down the Option 1 pathmeans that you'd be limited to exchange 244 Bytes of (I/O) data either way (i.e. the limit of a DP slave). Should you have to exchange more data,Option 2 would allow you to use more than one DP/DP coupler, with each couplergiving you 244 bytes of data either way. I hope this helps |
Last edited by: fritz at: 8/3/2009 2:10 AMAdded data limits of option 1 vs 2 Cheers |
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