Code 27000: Axis %1 is not safely referenced

Parameters: %1 = Axis number Definitions: There are two reasons for this alarm: - the machine position has not yet been acknowledged by the user, - the machine position 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. 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 the group alarm 27100 is displayed for all SI axes. 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: Traverse the axis to a known position, change to operating mode "Referencing" and press softkey "Agreement". Check the positions displayed in th e agreement screen on the machine. If they match the expected or known position, confirm this by usi ng the toggle key. If the user agreement has already been set, reference the axis again. The user agreement can be changed only via keys witch position 3 or after password entry. WARNING: If the axis is not referenced safely and the user agreement is not available, the following will apply: - the safe cams are not yet safe - the safe end positions are not yet active. Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary. Diagnostics Manual (DAsl), 03/2009