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6/1/2010 12:54 PM | |
Joined: 9/11/2006 Last visit: 3/17/2022 Posts: 168 Rating: (6) |
Hi maybe the following link may help: http://support.automation.siemens.com/WW/view/en/23683578 |
6/1/2010 9:19 PM | |
Joined: 9/27/2006 Last visit: 9/19/2024 Posts: 12282 Rating: (2684) |
Hello Pratap; It seems to me that the information provided to you does explain properlythe use of the FDC 157: it is, as you can see in the link provided to you, described as a DP/PA coupler, designed to interface between a Profibus-DP bus and a Profibus-PA instrumentation network. Nowhere is it mentionned that this unit is to be used for Fieldbus Foundation interfacing. Profibus-PA uses a physical layer and FISCO standards that are extremely close to FF, but the application layers are incompatible. I believe that the use of `fieldbus` in Fieldbus Foundation can lead to some confusion, as it seems to have happened here. Profibus-PA is a fieldbus, after all; there are many, many fieldbuses in operation today, including one called Foundation Fieldbus. So please refer to Foundation Fieldbus by its proper name, or by its initials FF, to make things clearer. Now, to my knowledge, at this time the only access to FF with a Siemens PLC would be the DP-FF link; and that is limited to a PCS 7 system for the moment (special CFC blocks are available for interfacing). You will find more information and a manual on the DP-FF link here: http://support.automation.siemens.com/WW/view/en/24327043 Now, there have been rumors for some time on the development of some kind of interface to FF for S7 PLCs, some have mentionned a direct rack-mounted module ( like a CP). But at this stage there has been no confirmation from Siemens on the subject. Hope this helps, Daniel Chartier |
7/8/2011 1:39 PM | |
Posts: 3 Rating: (0) |
I think the FF website is confusing, see this http://www.fieldbus.org/index.php?option=com_mtree&task=viewlink&link_id=1586&ffbstatus=Registered&Itemid=324 |
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