Siemens Sinumerik 840D sl Diagnostic Manual page 319

03/2009
20003 [Channel %1: ] Axis %2 measuring system error
Parameters: %1 = Channel number
%2 = Axis name, spindle number
Definitions: In a measuring system with distance-coded reference marks, the distance between two adjacent
markers has been found to be more than twice the value entered in MD34300
$MA_ENC_REFP_MARKER_DIST. The control does not issue the alarm until it has again detected
a distance that is too long after having made a 2nd attempt in reverse direction with half the traversing
velocity.
Reaction: NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Determine the distance between 2 odd reference marks (reference mark interval). This value (which
is 20.00 mm on Heidenhain scales) must be entered in MD34060 $MA_REFP_MAX_MARKER_DIST.
Check the reference track of the scale including the electronics for the evaluation.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
20004 [Channel %1: ] Axis %2 reference mark missing
Parameters: %1 = Channel number
%2 = Axis name, spindle number
Definitions: In the distance-coded length measurement system, 2 reference marks were not found within the
defined searching distance (axis-specific MD34060 $MA_REFP_MAX_MARKER_DIST).
A reduction cam is not required for distance-coded scales (but an existing cam will be evaluated). The
conventional direction key determines the direction of search.
The searching distance MD34060 $MA_REFP_MAX_MARKER_DIST, within which the two reference
marks are expected is counted commencing at the start point.
Reaction: NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Please inform the authorized personnel/service department.
Determine the distance between 2 odd reference point markers (reference point marker interval). This
value (which is 20.00 mm on Heidenhain scales) must be entered in the MD34060
$MA_REFP_MAX_MARKER_DIST.
Check the reference point track of the scale including the electronics for the evaluation.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
20005 [Channel %1: ] Axis %2 reference point approach aborted
Parameters: %1 = Channel number
%2 = Axis name, spindle number
Definitions: Referencing could not be completed for all stated axes (e.g., abort caused by missing servo enable,
measuring system switchover, release of direction key, etc.).
In distance-coded measuring systems, the alarm will also be displayed if the value 1 has been set in
MD34000 $MA_REFP_CAM_IS_ACTIV (reference cams) and one of the conditions stated in the rem-
edy has been fulfilled.
Reaction: NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
© Siemens AG, 2009. All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
NCK alarms
2-319