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| 4/9/2010 7:07 PM | |
Joined: 9/27/2006 Last visit: 9/10/2024 Posts: 12282 Rating:
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Hello umair; You don't mention the number of analog channels that you will need, but at first glance it seems that most S7-300 CPUs could all handle the number of modules you require. Selection criteria should look also on the size and complexity of your program and alsoyour communication requirements. For a medium-sized program (single-machine or limited-complexity process) withlittle high-speed comms, even a S7-314C-2DP would be very sufficient, it seems. Note that on the central rack a S7-300 can only have up to 8modules attached. You will have to deport the remaining ones (I do not believe at first glance that you can fit all your design in 8 signal modules only), either by using a deported rack (using an interface module IM 365 or a combination IM 360/IM 361) or use a Profibus-DP slave for your remaining IOs(the ET 200M DP-slavecan use S7-300 signal modules, the ET 200S uses granular IO modules of its own design...). To help you select your signal modules and CPU, here is one available ressource: https://www.automation.siemens.com/mcms/programmable-logic-controller/en/simatic-s7-controller/s7-300/Pages/Default.aspx You will find information pageson available digital and analog signal modules (with their technical caracteristics), and a link to the description of S7-300 CPUs on this Siemens Controller Portal. Going up one more level ( to the link "Industrial Automation Simatic systems" ) would also show you ET 200 options (for Profibus slaves). Hope this helps, Daniel Chartier |
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