5/1/2012 10:55 AM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (308) |
Hello, In the manual of the CM (http://support.automation.siemens.com/WW/view/en/49851842) it is stated at page 9: "For the constellation STEP 7 V11.0 and CPU firmware V2.0, resources are available for a maximum 16 DP slaves in total per station." |
Best regards |
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This contribution was helpful to1 thankful Users |
5/1/2012 11:32 AM | |
Posts: 272 Rating: (4) |
you can use a distributed S7 1200-S7 1200 communication system....it works fine... |
5/1/2012 12:26 PM | |
Joined: 4/24/2006 Last visit: 9/20/2024 Posts: 8742 Rating: (1168) |
Hello, Think about the Fiber optic solution, when you want long distance Best regards, Wizard |
5/1/2012 12:51 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (308) |
Hello, Have a look to the familiy XB000 of switches: http://support.automation.siemens.com/WW/view/en/32983806 There are copper models, andmodels with fiber optic (XB004-1). Pay attention that the number of PNIO devices supported by a S7-1200 as controller has also limits. Extract of thesystem manual of S7-1200 V2.0: "extract of the For PROFINET and PROFIBUS, the CPU supports a total of 16 devices. As an IO controller using PROFINET RT, the S7-1200 communicates with up to 8 PN devices on the local PN network or through a PN/PN coupler (link).". And this is also true for S7 connections. Extract of the system manual: Number of asynchronous communication connections supported - 3 CPU-to-CPU S7 connections for server GET/PUT data - 8 CPU-to-CPU S7 connections for client GET/PUT data |
Last edited by: jklm at: 5/1/2012 1:31 PMsystem limitations added Last edited by: jklm at: 5/1/2012 12:56 PMBest regards |
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5/2/2012 8:27 AM | |
Posts: 150 Rating: (17) |
AutoMaster I think the implementation that you intend to use is impossible. If I understand correctly, you want to install three Profibus Master modules (CM 1243-5) to one CPU. Unfortunatelly as stated at the CM 1243-5 manual page 25, paragraph 4.1: "You can configure a maximum of three CMs/CPs per station, of which only one may be a DP master (CM 1243-5)." If you try adding three CM1243-5 modules on CPU, step7 will not compile the setup. Further to that, without knowing the application and the number of IO my feeling is that if you have 30 slave plcs then it is quite an extended application with quite an extended programm. Assuming you use a 1214 CPU, are you sure that the 50kB of program memory are enough for your application? If the application is extended with lots of IO and with the prospect to grow, then you may have to consider moving up a notch and using a more powerfull and extendable platform like the 300. Regards |
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