Code 4402: %1 causes a machine data reset

Parameters: %1 = Machine data Definitions: If this machine data is set, the current machine dat a values are overwritten by the default values at the next ramp-up. Under certain circumstances, th is may cause data loss (even in the buffered memory). Reaction: Alarm display. Remedy: Please inform the authorized personnel/service departm ent. If the control includes user data that has not yet been saved, then a data backup must be performed before the next NCK power-up. By manually resetting the altered MD to the value it had before the last power-up, reorganization of the memory can be avoided. Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary.