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Beginner trying to get a S7 315-2 working

Created by: Lundin at: 4/21/2009 3:35 PM (7 Replies)

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4/21/2009 3:35 PM	Rate (0)
Lundin Posts: 4 Rating: (0)	I'm a complete beginner at PLCs. What I want to achieve is to connect a S7 315-2 DP to a Profibus network. I have bought the PLC and the USB adapter, and downloaded Step7 Lite. I can communicate with the PLC but that is about it. I cannot find anything Profibus-related anywhere, and I'm starting to suspect I took a hasty shortcut by buying the 315 off the shelf without any starter kit etc. Will the Step7 Lite suffice or do I need another program? All examples regarding Profibus are for the the "ugly" version of Step7 with the old Windows 3.1 graphics... and that program looks quite different from Step7 Lite. I'm not really interested in learning PLC programming or even making a useful application, I just want to connect to an external Profibus DP-V1 node with minimum effort.
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4/21/2009 4:01 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 3/8/2023 Posts: 703 Rating: (96)	Hello, the Step7 Lite should be sufficient to configure S7-300 PLC and to make some simlple user program. The PC Adapter USB is also ok for the connection. What is your HW configuration look like? There are two interfaces on the PLC you get. The left is by default the MPI interface, the right is Profibus DP master, but you have to configure it in HW configuration editor, e.g. to set up the Profibus node with the address, type of the Profibus network and the slave configuration. Have you done this? Regards Sydney
	Last edited by: Sydney at: 4/21/2009 4:03 PM
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4/21/2009 4:26 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 5/29/2023 Posts: 12024 Rating: (2594)	Hello guys; Unfortunately, Step 7 Lite is designed for centralised I/O configuration only, on S7300 level CPUs. STEP 7 Lite is designed for traditional PLC applications with centralized I/O. STEP 7 Lite is designed for non-networked automation applications using the SIMATIC S7-300 PLC, the C7 all-in-one PLC and HMI, and the intelligent CPUs of the ET200 distributed I/O family. [From the step 7 Lite presentation page]. Basically that means no remote I/O over Profibus-DP, and no Ethernet CPs; MPI is only used for programming the CPU, no Global Data or S7 functions available. No FM modules eitherYou need Step 7 Basis (or Professional)for this type of configuration. Maybe the table found on the link below can help you sort out the issue: Differences between Step 7 Lite, Step 7 Basis and Step 7 Professional: http://www.plcdev.com/step_7_lite_professional_differences Hope this helps, Daniel Chartier

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4/21/2009 4:34 PM	Rate (0)
Lundin Posts: 4 Rating: (0)	Thanks for your reply. I picked the MPI and connected the USB adapter to the left dsub connector, and then the PLC pops up as "Online CPU". Are you saying that I should connect the USB adapter to the right port as well and pick Profibus? I thought the left one was for PC communication and the right one was dedicated for the application? I did try to meddle with the right one, although I never managed to connect to the PLC through it.
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4/21/2009 4:39 PM	Rate (0)
Lundin Posts: 4 Rating: (0)	dchartier Hello guys; Unfortunately, Step 7 Lite is designed for centralised I/O configuration only, on S7300 level CPUs. STEP 7 Lite is designed for traditional PLC applications with centralized I/O. STEP 7 Lite is designed for non-networked automation applications using the SIMATIC S7-300 PLC, the C7 all-in-one PLC and HMI, and the intelligent CPUs of the ET200 distributed I/O family. [From the step 7 Lite presentation page]. Basically that means no remote I/O over Profibus-DP, and no Ethernet CPs; MPI is only used for programming the CPU, no Global Data or S7 functions available. No FM modules eitherYou need Step 7 Basis (or Professional)for this type of configuration. Maybe the table found on the link below can help you sort out the issue: Differences between Step 7 Lite, Step 7 Basis and Step 7 Professional: http://www.plcdev.com/step_7_lite_professional_differences Hope this helps, Daniel Chartier Ach... as I suspected.Where can I get the Step 7 basic? Is it available for free or do I have to pay yet another fortune to Siemens?
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4/21/2009 5:22 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 3/8/2023 Posts: 703 Rating: (96)	Sorry for mistaking, have so quickly read the information in catalog and didn't catch that with "non-networked" .Step7basic or prof.isn't free of charge and can't be downloaded (just servicepacks),it has to be ordered. Regards Sydney

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4/22/2009 9:41 AM	Rate (0)
Lundin Posts: 4 Rating: (0)	Which part number do I need for the Step 7 basic? The Siemes page is hard to interpret: https://mall.automation.siemens.com/SE/guest/content.asp?aktTab=4&lang=en&nodeID=5000153 I'm assuming 6ES7810-4CC08-0YA5. Also, why do they list documentation as a separate article? I would assume that documentation is included with the product...?
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4/22/2009 11:24 AM

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Sydney

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Joined: 1/4/2008

Last visit: 3/8/2023

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Hello,
yes basic Step7 is this order:

6ES7810-4CC08-0YA5

SIMATIC S7, STEP7 V5.4, FLOATING LICENSE FOR 1 USER, E-SW, SW AND DOCU. ON DVD, LICENSE KEY ON USB STICK, CLASS A, 5 LANGUAGES (GE,EN,FR,IT,SP), EXECUTABLE UNDER WINXPPROF, WIN VISTA ULTIMATE, WIN VISTA BUSINESS REFERENCE-HW: S7-300/400, C7

The documentation comes with the software, but just in electronic form (pdf) which is installed on HDtogether with the SW. In addition you can order the documentation in printed form (books).

Regard
Sydney

Created by: Lundin at: 4/21/2009 3:35 PM (7 Replies)

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Last edited by: Sydney at: 4/21/2009 4:03 PM

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