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01.99
04.05
766
Blocking frequency > Shannon frequency
Cause
The bandstop frequency of a speed setpoint filter is greater than the
Shannon sampling frequency from the sampling theorem.
Remedy
The bandstop frequency for P1514, filter 1 or P1517 for filter 2 must be
less than the inverse value of two speed controller clock cycles 1/ (2 *
P1001 * 31.23 microseconds).
Acknowledgement
RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
767
Natural frequency > Shannon frequency
Cause
The natural frequency of a speed setpoint filter is greater than the
Shannon sampling frequency from the sampling theorem.
Remedy
The natural frequency of a speed setpoint filter must be lower than the
reciprocal of two speed controller cycles.
Speed setpoint filter 1:
P1520 * 0.01 * P1514 < 1 / (2 * P1001 * 31.25 microseconds)
Speed setpoint filter 2:
P1521 * 0.01 * P1517 < 1 / (2 * P1001 * 31.25 microseconds)
Acknowledgement
RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
768
Numerator bandwidth > twice the blocking frequency
Cause
The numerator bandwidth of a current or speed setpoint filter is greater
than twice the bandstop frequency.
This alarm is only generated for the general bandstop, if the following is
valid:
Speed setpoint filter 1: P1516 > 2 * P1514 or P1520 <> 100.0
Speed setpoint filter 2: P1519 > 0.0 or P1521 <> 100.0
Current setpoint filter 1: P1212 > 0.0
Current setpoint filter 2: P1215 > 0.0
Current setpoint filter 3: P1218 > 0.0
Current setpoint filter 4: P1221 > 0.0
Remedy
The numerator bandwidth must be less than twice the bandstop fre-
quency.
Current setpoint filter 1: P1212 <= 2 * P1210
Current setpoint filter 2: P1215 <= 2 * P1213
Current setpoint filter 3: P1218 <= 2 * P1216
Current setpoint filter 4: P1221 <= 2 * P1219
Speed setpoint filter 1: P1516 <= 2 * P1514
Speed setpoint filter 2: P1519 <= 2 * P1517
Acknowledgement
RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
7 Fault Handling/Diagnostics
7.3
List of faults and warnings
7
7-687
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