Siemens SINUMERIK 840Di Diagnostic Manual page 773

11/2006
301704 Axis %1 drive %2 pole pair width/division of linear scale (internal) out of
range
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: With linear motors the pole-pair width and graduations data is used for calculating the equivalent
(internal) pole pair number and (internal) encoder marks. For this it is necessary that the encoder
marks correspond to one or x pole pair widths as an integer. This error message is output if the result
is not an integer pole pair width/graduations*x (to x=16) or if the calculated internal encoder marks
value is too high. Absolute interpretation as an integer if the result is within a +/- 0.001 tolerance.
Reaction: Mode group not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: 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
Program Switch control OFF - ON.
Continuation:
301705 Axis %1 drive %2 distance-coded scale incorrectly parameterized
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: 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.
Reaction: Mode group not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Please inform the authorized personnel/service department. Check and, if necessary, correct MDs
1011: $MD_ACTUAL_VALUE_CONFIG (actual value sensing configuration IM), 1040, 1041 and
1042.
Program Switch control OFF - ON.
Continuation:
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
Overview of Alarms
SIMODRIVE alarms
2-773