Siemens SINUMERIK 840D sl Series Diagnostics Manual page 395

08/2005
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
Remedy: Reboot the drive, hardware reset.
Program Con- Switch control OFF - ON.
tinuation:
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 sup-
plied the correct result. For example, wrong results can occur if the axis was moved 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
acknowledge the displayed actual position after the first referencing process.
When the user enable has first been set, follow-up referencing must be carried out each
time the control is booted (with absolute encoders, this follow-up referencing is executed
automatically). This procedure is carried out to verify the 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.
Reactions: - Alarm display.
SGA "Axis safely referenced" is not set. SE will be switched off, if the actual safety posi-
tion 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, their signifi-
cance 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 the agreement screen on the
machine. If they match the expected or known position, confirm this by using the toggle
key. If the user agreement has already been set, reference the axis again.
The user agreement can be changed only via keyswitch 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 Con- Alarm display showing cause of alarm disappears. No further operator action necessary.
tinuation:
27001
Axis %1 error in a monitoring channel, code %2, values: NCK %3, drive %4
Parameters: %1 = Axis number
%2 = Additional info cross-comparison index
%3 = NCK comparison value extension
%4 = Additional info comparison value drive
Definitions: The mutual comparison of the two monitoring channels has found a difference between
input data or results of the monitoring operations. One of the monitors no longer functions
reliably, i.e. safe operation is no longer possible.
The following error codes are possible on NCK side:
• 0 No error found in this channel; following alarm to drive alarm 300911.
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
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