Siemens SINUMERIK 840Di Diagnostic Manual page 458

Overview of Alarms
NCK alarms
27005 Axis %1 error in data cross check: static actual value difference
Parameters: %1 = Axis number
Definitions: Via the data cross check between NCK and 611D monitoring channel, a difference in actual values
was detected, which is greater than the maximum tolerance defined in MD $MA_SAFE_POS_TOL.
This can be checked by means of the safe position values for the two monitoring channels displayed
in the service menu.
The alarm is displayed only, if monitoring with absolute reference (SE/SN) has been enabled for the
specified axis and if the user enable has been set. The alarm is cleared, as soon as the user enable
is deleted or the actual value difference between the two monitoring channels falls again below the
maximum permissible difference.
Reaction: Alarm display.
Remedy: If the alarm is present statically, the user enable must be deleted. When the control is then rebooted,
the machine can be brought to the safe state again and operation resumed by a new referencing
process and setting of the user enable. Prior to setting the user enable, the actual position of the axis
displayed in the "User enable" screen must be compared with the current machine position. This is
obligatory to ensure the proper functioning of the safe limit positions (SE) and safe cams (SN).
A change of the user acknowledgement is only possible with key switch position 3 or after input of a
password.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
27006 Axis %1 Test ext. pulse deletion running
Parameters: %1 = Axis number
Definitions: The correct functioning of the external pulse disable is being checked now by setting the "Test stop of
external shutdown" SGE.
Reaction: Alarm display.
Remedy: Alarm disappears automatically when the test has been exited by deleting the "Test stop of external
shutdown" SGE.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
27007 Axis %1 acceptance test mode is active
Parameters: %1 = Axis number
Definitions: Via the operator panel, an SI acceptance test has been started for example with the acceptance test
wizard. The acceptance test mode is activated via the NCK and drive for the time of this acceptance
test. In the acceptance test mode, SI PowerOn alarms can be acknowledged with the Reset key.
Reaction: Alarm display.
Remedy: Deselect the acceptance test, for example with the acceptance test wizard or wait until completed
(acceptance test time can be parameterized via MD $MA_SAFE_ACCEPTANCE_TST_TIMEOUT).
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
27008 Axis %1 SW limit switch deactivated
Parameters: %1 = Axis number
Definitions: Via the HMI, the SI acceptance test Safe limit position has been started, for example with the
acceptance test wizard. For these acceptance tests, the single-channel software limit switches are
deactivated for the axis/spindle, in order to assure that the safe limit positions can be approached.
Reaction: Alarm display.
Deactivation of the single-channel software limit switch for the displayed axis/spindle.
Remedy: Deselect the acceptance test, for example with the acceptance test wizard, or wait until completed.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
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© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006