Siemens SINUMERIK 840D sl Series Diagnostics Manual page 866

Overview of Alarms
Program Con- Switch control OFF - ON.
tinuation:
300748
Axis %1 drive %2 monitoring cycle times of both axes differ
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The monitoring cycles set in MD 1300: $MD_SAFETY_CYCLE_TIME (monitoring cycle)
for the two axes of a 2-axis module are not identical.
Request: During boot-up of the control.
Reactions: - 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, cor-
rect MD 1300: $MD_SAFETY_CYCLE_TIME (monitoring cycle) on all drives of the mod-
ule.
Program Con- Switch control OFF - ON.
tinuation:
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)
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005