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Output value retain problem

Created by: Ammu at: 2/5/2011 12:48 PM (1 Replies)

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2/5/2011 12:48 PM	Rate (0)
Ammu Posts: 59 Rating: (0)	Dear All, I'm using Step7 V5.4 SP4 with CPU 414-4H & i'm using 4MB Flash Memory. In Process there are 10 Totalizer and all are working fine. The totalized value is calculated from the Input flow per hour and as per that the totalized value is output in particular DB. Now when the CPU is switched OFF, my totalized value becomes zero, but i want to retain the output value in DB even after CPU is switched OFF i.e. i want to retain the last totalized value even after CPU Power is made OFF, but its not happening. As per my knowledge, if the value is to be Input, that we can initalize in the DB, but this is the calculated value and then substuited in the DB. So how can i retain the last value when CPU is switched OFF. Can anybody help me out? Thanks & Regards, AMMU.
Ammu Posts: 59 Rating: (0)
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2/7/2011 1:09 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	Dear member Please check the following link: Retentivity behavior of S7-300 CPU 31x and complete devices C7-6xx with MMC Hope this helps BR
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