Code 27100: At least one axis is not safely referenced

Definitions: There are two reasons for this alarm: - the machine position of at least one of the ax es monitored with SI has not yet been acknowledged by the user, or - the machine position of at least one of the axes monitored with SI has not yet been verified through follow-up referencing. Even if the axis is already referenced, there is no confirmation that referencing has supplied the correct result. For example, wrong resu lts can occur if the axis was mo ved after the control was switched off, with the result that the standstill position saved prior to switching off is no longer correct. To make sure that this does not happen, the user must ack nowledge the displayed actual position after the first referencing process. Diagnostics Manual (DAsl), 03/2009 When the user enable has first been set, follow-up refe rencing must be carried out each time the control is booted (with absolute encoders, this followup referencing is executed automatically). This procedure is carried out to verify t he standstill position saved prior to switching off of the control. Via the MD $MN_SAFE_ALARM_SUPPRESS_LEVEL (MD>=3 ), the alarm display can be set in such a way that an alarm is given for each axis i ndividually which has not been safely referenced. Reaction: Alarm display. SGA "Axis safely referenced" is not set. SE will be switched off, if the actual safety position has not yet been confirmed by a user agreement. If the user agreement has been set, SE will remain active. The safe cams are calculated and output. However, thei r significance is limited as referencing has not been confirmed. Remedy: Move all SI axes to known positions and change to "Referencing" mode. Check the positions on the machine displayed in the user c onfirmation field and set "User conf irmation" via the selection/toggle key. If the user confirmation for the axes has already been set, reference the axes again. Changing the user confirmation will be possible onl y in key switch position 3 or after password entry Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary.