1/2/2013 10:05 AM | |
Posts: 6 Rating:
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My Dear Friend , I am also facing this problem in my PLC S1214C. can you give clear idea on this. pls ...
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7/13/2013 4:17 AM | |
Posts: 111 Rating:
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Hi, Do you mean I have to save it in DBs or Retentive memory of CPU can keep data? I'm working with CPU313C Regards
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7/13/2013 6:31 AM | |
Joined: 1/28/2009 Last visit: 8/26/2024 Posts: 6846 Rating:
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For each CPU in range of S7 300 you should check their Spec(attatchment): https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=6ES73135BF030AB0&caller=view In the case of mentioned hardware, It is possible for both memories and DBs.
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7/13/2013 9:10 AM | |
Joined: 5/28/2008 Last visit: 8/29/2024 Posts: 4515 Rating:
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I do not know from where Grop get this piece of info
It is mentioned here thatRetention duration is 20 days / 12 days min. at 40 deg. See Appendix 2 ofSIMATIC S7-1200 Easy Book If I remember well, retentive memory duration was 50-190 hours in S7-200. Hope this helps.
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Ayman Elotaify |
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7/13/2013 9:18 AM | |
Joined: 11/8/2011 Last visit: 8/21/2024 Posts: 387 Rating:
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The retentive memory is a Nonvolaltile, there is no specific days after which the memory will erase. Have look on this threads retentive memory and db problemand How can you back up the actual values of DBs and markers? |
7/14/2013 2:43 PM | |
Joined: 1/28/2009 Last visit: 8/26/2024 Posts: 6846 Rating:
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Hello again, Memories and DBs are resources in the CPU with different structure and capabillities.You can refer to "Programming With STEP 7" manual for more help.OK,you have selected the the memories in the H.W Config to be retentive.That is the procedure and about the time data "Kept" intact even machine power off, read post published by my friend "Ayman Elotaify". Best regards Hamid Hosseini |
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