Permanently store memory values(Memory words) %MW?

[Penko Mitev 0]

Hello everybody! Here is what I am trying to find implementation for: By default, when writing to the Schneider Twido PLC, all memory variables are set to a value of 0. This is very awkward according to my mind because if you have a ready application which has some values it uses and suddenly the customer calls you and wants some modification of the PLC program - all values will be lost. If not something else, I would like to let the customer has the possibility to modify Timers via the HMI and this has to be done with %MW words, but they are lost after you upload a program at a future point? To summarize, is there a way to update the application, but do not touch %MW memory words and leave their values dependent on the execution, not to pre-configured values or 0? Edited 26 Mar 2010 by Penko Mitev