Cold retain value
As you know ,can not save cold retain value cyclic or by function block in redundant controller, so i tried save cold retain value with tools menu n control builder,but is dimmed ,why?
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Saving cold retain values is only possible in online mode. Also you can verify the following setting found in the help (search for "Tools Menu"):
Save Coldretain Values
Normally coldretain values are retrieved from the controller, when going from online to offline mode. By setting the EnableColdRetain variable to True in Tools >Setup>Station>Application, the user can select when coldretain values are to be saved. See also Restart in Go Online and Execution.