Siemens SINUMERIK 840D sl Series Diagnostics Manual page 384

Overview of Alarms
Remedy: Modify the system variable $AA_QEC_COARSE_STEPS accordingly.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
26008
Axis %1 QEC: invalid fine step size
Parameters: %1 = Axis name, spindle number
Definitions: The fine step size for quadrant error compensation must be in the range 1 <= fine step
size <= 16 because this value has an influence on the computation time of the QEC.
Reactions: - Alarm display.
Remedy: Modify the system variable $AA_QEC_FINE_STEPS accordingly.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
26009
Axis %1 QEC: memory overflow
Parameters: %1 = Axis name, spindle number
Definitions: The product of the data $AA_QEC_COARSE_STEPS+1 and $AA_QEC_FINE_STEPS
must not exceed the maximum number of the characteristic curve points (MD 18342
MM_QEC_MAX_POINTS). With a direction-dependent characteristic, this criterion
applies to 2 * ($AA_QEC_COARSE_STEPS+1) * $AA_QEC_FINE_STEPS!
Reactions: - Alarm display.
Remedy: Please inform the authorized personnel/service department. Either increase 18342
MM_QEC_MAX_POINTS or reduce $AA_QEC_COARSE_STEPS and/or
$AA_QEC_FINE_STEPS.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
26010
Axis %1 QEC: invalid acceleration characteristic
Parameters: %1 = Axis name, spindle number
Definitions: $AA_QEC_ACCEL_1/2/3: The acceleration characteristic is divided into three areas. In
each area there is a different quantization of the acceleration steps. The defaults should
be changed only if compensation is inadequate in these acceleration areas.
The defaults are as follows:
• $AA_QEC_ACCEL_1 with approx. 2% of maximum acceleration
($AA_QEC_ACCEL_3),
• $AA_QEC_ACCEL_2 with approx. 60% of maximum acceleration
($AA_QEC_ACCEL_3),
• $AA_QEC_ACCEL_3 with maximum acceleration (32300 MAX_AX_ACCEL).
Reactions: - Alarm display.
Remedy: Please inform the authorized personnel/service department. Enter the values correctly: 0
< $AA_QEC_ACCEL_1 < $AA_QEC_ACCEL_2 < $AA_QEC_ACCEL_3.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
26011
Axis %1 QEC: invalid measuring periods
Parameters: %1 = Axis name, spindle number
Definitions: $AA_QEC_MEAS_TIME_1/2/3: measuring time to determine the error criterion.
The measuring period begins when the criterion for activating the compensation value
has been satisfied (the desired velocity changes the sign). The end is defined by the
machine data values. In general, different measuring times are required for the three
characteristic ranges. The presettings should be changed only if a problem occurs. The
three data apply in each case for the three corresponding acceleration ranges.
1. $AA_QEC_MEAS_TIME_1 specifies the measuring time (for determining the error cri-
terion) for accelerations in the range between 0 and $AA_QEC_ACCEL_1.
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005