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| 3/23/2009 7:27 AM | |||||||||||||||||||||||
Joined: 9/27/2006 Last visit: 9/16/2024 Posts: 12282 Rating:
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Hello Amitava; Here is one suggestion: As far as the main CPUs go, you don't mention theexpected requirements so it will be difficult to point you to a model: how many local I/Os, what amount of data processing is expected, do they need to exchange data between each other... But basically from the rest of the description you could look at the properties of the CPU 315-PN/DP as a starter; it would be a good compromise between capacity and price:
One possible solution for the RIO could be an ET 200S station on Profibus-DP. Profibus easily allows segments of up to 400m at speeds of 500 kB/s, and the ET 200S should easily interface the number of I/Os you require. The ET 200S is a "granular" slave, each I/O module has 2 or 4 I/O points max, so you can build it up to match your needs very precisely; the IM 151-1 standard would be the right interface m,odule for a project such as yours.. On the following link you will find information on the ET 200S Profibus slave, and a configurator program that would allow you to configure one for your needs, as a test first, but this configuration can also be exported to Step 7 if you decide to implement it. https://www.automation.siemens.com/simatic/dp/html_76/produkte/et200s.htm With the suggested CPU (315-PN/DP) you could use the Profinet or Profibus-DP connections for your SCADA and HMI panels, easily done if you are using WinCC and Siemens panels (programmed with WinCC Flexible). The Siemens HMI portal page will give you links to the presently available operator panels and SCADA software: https://www.automation.siemens.com/simatic/portal/html_76/techdok_simatic/hmi_techdoku.htm?HTTPS=REDIR Hope this helps, Daniel Chartier |
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| 4/1/2009 12:49 PM | |
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Posts: 8 Rating:
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Thx a lot. my required IO in main PLC is 16/16 DI/DO. i have made a configuration like this. pls have a look and comment whether it will work or not.
AttachmentPLC-CONFIGURATION-2.dwg.pdf (412 Downloads) |
| 4/1/2009 4:41 PM | |
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Joined: 9/27/2006 Last visit: 9/16/2024 Posts: 12282 Rating:
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Hello amitava; At first glance it is possible to maske such a network as you prtopose, with the following elements to consider: * presently you are grouping all CPUs , all ET 200S stations and all SCADAs to one single Profibus network. SCADAs (and HMIs) are Masters Class 2 on profibus-DP, CPUs are Masters class 1; the imortant thing is that they all can hold the profibus token as it goes around the bus, so this high number of masters will considerably slow down the network exchanges. It would be better if you could segregate the Profibus networks linking the CPUs with their ET 200S slaves on separate Profibus networks. A little more wiring, but a lot more speed and efficiency in the communication. *if I were designing this system and needed to show data from all CPUs on all SCADA screens, I would suggest a CP 343-1 in each CPU to connect them to the SCADA, with sitches every 100 m to maintain the connections. This would also help to relieve the data echange rate between CPUs and slave stationss without impacting the functionning of the SCADA. You could also plan a second profibus network, only for SCADA stations, using a CP 342-5 in the CPU rack. *CPus 313-2DP have 16 DI/16DO inbuilt, but the addresses are fixed in the configuration: DI:I124.0 to I125.7 DO: I124.0 to I125.7 *If you are connecting the MPI buses of the CPus in order t program and monitor them through a single programming unit, you should create a single project with 10 different CPU programs integrated. That will make all monitoring functions available without problems. These are my first impressions. please come back if you have more questions; I will think about this a bit more and see if I have other thoughts. Regards, Daniel Chartier |
| 4/17/2009 1:08 PM | |
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Posts: 8 Rating:
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sorry for the delay in responce i have come up with a alternative configuration : 1. in the attachment i have shown 2 systems ...but there will be 10 such systems. 2. pls. study the configuration and comment. i will wait for u. regards, Amitava AttachmentPLC-CONFIG-151-8-cust.pdf (382 Downloads) |
| 4/18/2009 7:58 AM | |
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Posts: 8 Rating:
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Dear Sir, kindly find the config attached for better clarity. 1.my main concern is , will the two IM151-8 communicate with each other as shown in the config? 2. my internode distance is 300 m , will profinet support ? can i use fiber optic cable as shown in config for internode connection , though none modules have FO port ? 3. will u suggest a separate bus for the scada ? 4. can i connect the profinet network to form a loop to get redundent effect ? 5. can i generate an alarm , whenever there is disconnection in network ? regards, Amitava AttachmentPLC-CONFIG-151-8-18-cust.pdf (348 Downloads) |
Last edited by: amitava_siemens at: 4/20/2009 9:32 AM |
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