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One of the basic concepts of a PLC is that the data table is retained upon program stop, whether that be manually stopping the scan, or the actual powering down of the controller.
Has anyone put any thoughts into how we can handle this? In a real PLC is genuine battery backed up RAM, so their is no "save on power failure", we unfortunately don't have that luxury. Nor can we depend upon every installation having a UPS.
Anyone know a way around this, that doesn't cause us to really spend a lot of time writing changing data table to the disk? Or are we going to have to have a task for this? If so, we need to look at some of the database projects, they have similar issues with recovery logs.
--
Stan Brown [email protected] 843-745-3154
Westvaco
Charleston SC.
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Has anyone put any thoughts into how we can handle this? In a real PLC is genuine battery backed up RAM, so their is no "save on power failure", we unfortunately don't have that luxury. Nor can we depend upon every installation having a UPS.
Anyone know a way around this, that doesn't cause us to really spend a lot of time writing changing data table to the disk? Or are we going to have to have a task for this? If so, we need to look at some of the database projects, they have similar issues with recovery logs.
--
Stan Brown [email protected] 843-745-3154
Westvaco
Charleston SC.
_______________________________________________
LinuxPLC mailing list
[email protected]
http://linuxplc.org/mailman/listinfo/linuxplc