Siemens SINUMERIK 840D Series Diagnostics Manual page 540

1 Alarms
Remedy:
Program Continuation:
301705
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
301706
Parameters:
Definitions:
1-540
Please inform the authorized personnel/service department.
• Long traversing paths: It is advisable to use a length measuring system where the
encoder marks match x* pole pair widths as integer.
• Short traversing paths: With short traversing paths, only a small error can accumulate
and hardly affect the heating and the maximum power that can be reached if the
encoder marks do not comply with the +/-0.001 tolerance. Then it is advisable to slightly
modify the pole pair width:
Example:
Pole pair width: 56.8 mm, graduations: 2.7 µm
=> Pole pair number = 1, encoder marks = 21037.037 => error
Avoid the error by entering pole pair width = 56.7999 mm.
=> Pole pair number = 1, encoder marks = 21037.0 => no error
Switch control OFF - ON.
Axis %1 drive %2 distance-coded scale incorrectly parameterized
%1 = NC axis number
%2 = Drive number
When selecting a distance-coded scale (MD_1011.7=1) it is also necessary to configure a
length measuring system (MD_1011.4=1). In addition, the MDs 1040, 1041 and 1042
must not be zero or negative.
- Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- NC Stop on alarm.
- Alarm display.
- Interface signals are set.
Please inform the authorized personnel/service department. Check and, if necessary, cor-
rect MDs 1011: $MD_ACTUAL_VALUE_CONFIG (actual value sensing configuration IM),
1040, 1041 and 1042.
Switch control OFF - ON.
Axis %1 drive %2 parameterization of cam position invalid
%1 = NC axis number
%2 = Drive number
At least one of the parameterized cams enabled via MD 1301:
$MD_SAFE_FUNCTION_ENABLE (safe functions enable) does not comply with the rule
stating that cam positions are not allowed to be within the tolerance range around the
modulo position.
The valid tolerance range is:
• With inactive cam synchronization (MD 1301 bit 7 = 0):
Lower modulo value + POS_TOL <= cam position
Upper modulo value - POS_TOL > cam position
• With active cam synchronization (MD 1301 bit 7 = 1):
Lower modulo value + POS_TOL <= cam position
Upper modulo value - POS_TOL - CAM_TOL > cam position
Explanations:
• POS_TOL: Actual value tolerance (MD 1342: $MD_SAFE_POS_TOL (actual value tol-
erance cross-comparison))
• CAM_TOL: Cam tolerance (MD 1340: $MD_SAFE_CAM_TOL (tolerance for safe
cams))
• Upper/lower modulo value: is determined by MD 1305:
$MD_SAFE_MODULO_RANGE (actual value range for safe cam with rotary axes)
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
 Siemens AG, 2002. All rights reserved
11.02