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Help for selecting a PLC from S7-300 family

Created by: desmul24 at: 11/23/2012 4:08 PM (2 Replies)

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11/23/2012 4:08 PM	Rate (0)
desmul24 Posts: 378 Rating: (73)	Hi All, I have Jacquard Weaving machine(SOMET THEMA-11) it is very old with good mechanical conditions. The control cards are so old(1994) fashion and I couldn't get spares. Therefore I have decided to replace with SIEMENS PLC from s7-300 family and here is the I/O's configurations: 1. Yarn picks => 2000 Digital Outputs (for controlling solonoids). 2. Machine Control => 25 Digital Outputs. 3. Analog Outputs => 5 4. Digital Inputs => 64 5. Analog Inputs => 8 6. Expected Maximum Scan time => 200ms As you can see from above the digital outputs are more than 2000 and I am afraid a PLC can support this. Please any one suggest me a hardware combination that could meet my requirements. Kind Regards
desmul24 Posts: 378 Rating: (73)
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11/23/2012 5:41 PM

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dchartier

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Hello desmul;
The capacity of a S7-317-xxxx or S7-319-xxxx to handle all these I/Os and the amount of programming required should be enough, even though the project looks imposing. See their technical specs in the following links:

6ES7317-2EK14-0AB0	CPU317-2PN/ DP, 1 MB
6ES7318-3EL01-0AB0	CPU319-3 PN/DP, 2 MB

As far as the amount of distributed racks (either Profibus-DP or Profinet) you would require for the DO modules, this would depend a lot on the number and type of signals you can implement in a single DO module.
For example Siemens offers 64-DO and 32-DO modules, 24 V DC; see the following attachment, taken from the S7-300 Module Data manual.
SIMATIC S7-300 S7-300 Automation System Module Data

You have to determine what kind of signal your equipment will respond to, if you require intermediate relays... But let's assume for nowthat 64-DO modules are acceptable; your 2000 DOs could be controlled with 32 DO cards. ET 200M interfaces (IM 153-2HF for DP, IM 153-4 for Profinet) support 12 IO modules on ther rack, so you would need 3 distributed racks to connect the controller toyour equipment. By the same calculation, 32-DO modules would need 6 racks, 16-DO modules... Most of these configurations could be setup in a single (double door) control panel.
Profibus-DP for example can support up to 125 nodes on the bus, so really that would not be a problem.

For your own benefits, I suggest your start out with the S7 controller configurator offered by Siemens in the Siemens Industry Mall. It would be at least a starting point for your project design;

https://eb.automation.siemens.com/goos/catalog/Pages/ProductData.aspx?language=en&nodeid=5000008&tree=CatalogTree&regionUrl=/#topAnch

Hope this helps,
Daniel Chartier

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Last edited by: dchartier at: 11/23/2012 6:47 PM

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11/25/2012 12:53 PM	Rate (0)
desmul24 Posts: 378 Rating: (73)	Hello dchartier, I never get such a clear and excellent answers Thank you so much you have done a part of my project! Once again Thank you!
desmul24 Posts: 378 Rating: (73)
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Created by: desmul24 at: 11/23/2012 4:08 PM (2 Replies)

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