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Could S7-300 just read data of ABB PST Soft Starter ?

Created by: AymanTermanini at: 9/17/2010 6:40 PM (6 Replies)

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9/17/2010 6:40 PM	Rate (0)
AymanTermanini Posts: 9 Rating: (1)	Dear Experts, If anybody work previously in networking between S7-300 & ABB Soft Starter ? I have an ABB Softstart PST will be connected to CPU313-2DP over Profibus-DP : Requirements : - The control (Run/Stop) of PST should be done by its digital inputs - The PLC just should monitor the PST by reading status over network Question : Could we mix between controlling the softstart by its inputs & read its information by PLC over networkin the same time , as we do in Inverters for example . Suggestion: If it's not allowable , I think in multiplexing between control mode of PST by using Digital Output of the PLC to disable the fieldbus feature of PST most the time , then enable it to read information by PLC ... like taking samples ! ... Is there Disadvantages from Network Viewpoint ?? Best Regards
AymanTermanini Posts: 9 Rating: (1)
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9/17/2010 7:24 PM	Rate (0)
Ben Rad Bronze Member Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11)	Ayman, I know that you can hook up to an ABB drive either trough Profibus or Serial. That should be possible with Soft Starter as well. Soft Starters usually have proper digital inputs to start and stop them. If that is all you are going to do, you better go with digital signals, unless you are looking for more info which requires serial communication. Regards, Behnam www.sigmaprocess.ca/blog

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9/17/2010 8:08 PM	Rate (0)
AymanTermanini Posts: 9 Rating: (1)	Behnam R Ayman, I know that you can hook up to an ABB drive either trough Profibus or Serial. That should be possible with Soft Starter as well. Soft Starters usually have proper digital inputs to start and stop them. If that is all you are going to do, you better go with digital signals, unless you are looking for more info which requires serial communication. Behnam Thnx Behnam for you Post but I'm not asking about the suitable way ( DI or Profibus ) ,I need them both in my project . Profibus : to get information Digital Inputs : to operate it . Ayman
AymanTermanini Posts: 9 Rating: (1)
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9/17/2010 8:16 PM	Rate (0)
Ben Rad Bronze Member Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11)	Ayman, You should definitely be able to operate it through Digital signals. For communication on profibus, you need to check with ABB and see if you can add a profibus board like the ABB drives which let you get info from the Soft Starter. Regards, Behnam www.sigmaprcess.ca/blog

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9/17/2010 10:10 PM	Rate (0)
AymanTermanini Posts: 9 Rating: (1)	Dear Behnam, Sorry if my request isn't obvious to you . Those sofstarters support profibus & how to use it through gsd is so easy. But my issue : after studying their manual, I think that we couldn't communication partly with PST just in reading its I/O registers &simultaneouslydrive it through Digital Inputs . Anyway Iappreciate your reply , & hope to find the answer from somebody who try that kind of SoftStarters. May be you're right this problem should be discussed with ABB staff , but unfortunately I didn't find their forum . Best Regards
AymanTermanini Posts: 9 Rating: (1)
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9/17/2010 10:28 PM	Rate (0)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 9/10/2024 Posts: 12282 Rating: (2682)	Hello Ayman; I do not know of any ABB user's forum, such as we have here. But wherever I have worked with ABB there have been very knowledgeable local service technicians and engineers who could provide quick answers upon request. Where are you located? If you open the ABB.com homepage, you can select any country where they have facilities and retrieve contact and supportinformation. This for example is the ABB website from Egypt: http://www.eg.abb.com/ Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 9/17/2010 10:30 PM Sorry, late Friday typing and big fingers, too many typos!
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9/17/2010 10:42 PM	Rate (0)
Ben Rad Bronze Member Joined: 7/28/2010 Last visit: 8/31/2024 Posts: 184 Rating: (11)	Ayman, If you can't have them simultaneously. Wire the push buttons or any other external signal to PLC input. Wire PLC output to the Soft Starter (those which can start and stop it). You receive the inputs and control the Soft Starter via profibus all the time. You don't pass signals on the outputs unless you select failure on the Profibus communication. Regards, Behnam www.sigmaprocess.ca/blog

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