10/1/2019 3:44 PM | |
Joined: 9/27/2006 Last visit: 9/18/2024 Posts: 12282 Rating: (2684)
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Hello Honganh; Replacing a S7 314 IFM with a CPU 313C(-2DP ?) can be done, actually it is one of the recommended alternatives suggested by Siemens: Total Discontinuation of CPU 312 IFM and CPU 314 IFM https://support.industry.siemens.com/cs/ww/en/view/62830422 However this cannot be done automatically. The CPU 314 IFM is one of the earliest S7-300 CPUs, with a small amount of work memory (32 kB only), some integrated I/O and available technological functions based on these integrated I/O.(counting, frequency measurement...). The replacement CPU 313C is of a more recent generation, has much more memory (128 kB in most models); it has integrated I/Os, but the address numbers and type will depend on the part number of the CPU. See this document for details, on pages 231 and 248. SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications https://support.industry.siemens.com/cs/us/en/view/12996906 The compact S7 CPUs (S7-312C-xx, S7-313C-xx, S7-314C-xx) also integrate technological functions, simlar to those of the CPU 314 IFM, but they have neen recoded as SFCs and SFBs. In your new perogram you will have to use these function designations. SIMATIC S7-300 CPU 31xC Technological Functions https://support.industry.siemens.com/cs/us/en/view/12429336 So there needs to be an examination of the existing program of the CPU 314 IFM, and a comparison (with modifications) with the specifications of the replacement CPU, before you try to download the existing program. There have been other discussions on the forum that cover thje same subject, here is one. Please follow the suggestions of the forum members: CPU314 IFM Problem https://support.industry.siemens.com/tf//us/en/posts/cpu314-ifm-problem/167285/?page=0&pageSize=10 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 10/01/2019 16:40:08 |
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10/2/2019 6:22 AM | |
Joined: 1/5/2016 Last visit: 6/14/2024 Posts: 49 Rating: (1) |
Thank you so much for your advices. i want to use CPU313C (not DP) to replace CPU314 IFM. is that possible? |
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