7
7.3
List of faults and warnings
7-691
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
781
No-load current, motor \%d > rated power section cur-
rent
Cause
The motor no-load current (P1136) has been set to higher values than
the rated power section current.
before SW 2.4 the following is valid: Rated power section current =
P1111
from SW 2.4 the following is valid: Rated power section current = P1111
* P1099
Remedy
– Enter the valid current for the motor used in P1136.
Third-party motor:
The required currents should be determined using a motor data sheet.
Siemens motor:
The currents are determined using the motor code (P1102).
– Reduce the power section pulse frequency P1100.
– Use a higher-rating power section (re-commission).
Acknowledgement RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
782
Reactance motor \%d invalid
Cause
The stator leakage reactance (P1139) or the rotor leakage reactance
(P1140) or the magnetizing reactance (P1141) of the motor is incorrect
(less than/equal to zero).
Remedy
Determine the stator, rotor leakage reactance and magnetizing reac-
tance of the motor used and enter in P1139, P1140 and P1141.
Third-party motor:
The values should be determined from a motor data sheet.
Siemens motor:
The values are determined from the motor code (P1102).
Acknowledgement RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
783
Rotor resistance, motor \%d invalid
Cause
The rotor resistance (P1138, cold) of the motor is zero or there was a
format overflow for an internal conversion.
Remedy
The following parameters can have incorrect values:
P1001 (speed controller cycle)
P1134 (rated motor frequency)
P1138 (rotor resistance)
P1139 (leakage stator reactance)
P1140 (leakage rotor reactance)
P1141 (magnetizing field reactance)
Check the parameter, and if required, correct using the motor data
sheet.
The following condition must be fulfilled:
16 * P1001 * 0.00003125 * P1138 * 2PI * P1134 / (P1140 + P1141) < 1
Acknowledgement RESET FAULT MEMORY
Stop response
STOP II (SRM, SLM) STOP I (ARM)
7 Fault Handling/Diagnostics
01.99
04.05