Siemens SINUMERIK 840Di Diagnostic Manual page 739

11/2006
300749 Axis %1 drive %2 conversion factor between motor and load too large
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The conversion factor from the motor system [increments] to the load system [µm/mdeg] is larger than
1 or the factor which converts the load system to the motor system is larger than 65535.
Conditions:
The condition for the factor load system to motor system is: µm_to_incr <= 65535
The condition for the factor motor system to load system is: incr_to_µm <= 1
with µm_to_incr = 1 / incr_to_µm
Formula for rotary axis:
The following applies for rotary motor encoder and rotary axis:
incr_to_µm(n) = (MD1321 SAFE_ENC_GEAR_DENOM(n) / (MD1322 SAFE_ENC_NUMERA(n)) *
incr_to_µm_rot_rotax
with n = 0 ... 7 (gear stage) and
incr_to_µm_rot_rotax = (360000 / 8192) * (1 / MD1318 SAFE_ENC_RESOL)
- MD 1318 SAFE_ENC_RESOL (number of encoder lines per revolution)
- MD 1321 SAFE_ENC_GEAR_DENOM[n] (encoder/load gear denominator)
- MD 1322 SAFE_ENC_GEAR_NUMERA[n] (encoder/load gear numerator)
Formula for linear axis:
The following applies for rotary motor encoder and linear axis:
incr_to_µm(n) = (MD1321 SAFE_ ENC_ GEAR_ DENOM(n) / (MD1322 SAFE_ ENC_ NUMERA(n))
* incr_to_µm_rot_lin
incr_to_µm_rot_lin = (1000 / 8192) * (1 / MD1318 SAFE_ENC_RESOL) * MD1320
SAFE_ENC_GEAR_PITCH
Explanations:
- MD 1318 SAFE_ENC_RESOL (number of encoder lines per revolution)
- MD 1320 SAFE_ENC_GEAR_PITCH (spindle pitch)
- MD 1321 SAFE_ENC_GEAR_DENOM[n] (encoder/load gear denominator)
- MD 1322 SAFE_ENC_GEAR_NUMERA[n] (encoder/load gear numerator)
- n = 0 ... 7 (gear stage)
Request: During boot-up of the control.
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 the following safety-relevant MDs
depending on the motor encoder type and axis type and correct, if necessary.
- MD 1317 SAFE_ENC_GRID_POINT_DIST Grid division linear scale (for linear encoder)
- MD 1318 SAFE_ENC_RESOL Encoder marks per revolution (for rotary encoder)
- MD 1318 SAFE_ENC_RESOL
- MD 1320 SAFE_ENC_GEAR_PITCH (for rotary encoder and linear axis)
- MD 1321 SAFE_ENC_GEAR_DENOM
- MD 1322 SAFE_ENC_GEAR_NUMERA (when using a gear)
- The motor encoder type and the axis type are determined via MD 1302: SAFE_IS_ROT_AX.
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
2-739