Siemens Sinumerik 840C Diagnostics Manual page 225

04/96
07/97
300783 Rotor resistance invalid
Scan
Power–up and cyclic
Effect
MSD only:
– Pulse suppression, motor coasts down
– SIMODRIVE_READY and DRIVE_READY are canceled.
Explanation
The rotor resistance is less than or equal to zero or a format overflow has occurred.
Remedy
The following machine data may have an incorrect value:
– Speed controller cycle MD 1001
– Motor rated frequency MD 1134
– Rotor resistance cold MD 1138
– Stator leakage reactance MD 1139
– Rotor leakage reactance MD 1140.
Note
Applies as from SW 6
300784 Motor no-load voltage invalid
Scan
Power–up and cyclic
Effect
MSD only:
– Pulse suppression, motor coasts down
– SIMODRIVE_READY and DRIVE_READY are canceled.
Explanation
Error in no–load voltage (MD 1135):
MD 1135 x 0 or
–
– MD 1135 > MD 1132 or
– MD 1135 x MD 1142 / MD 1400 + Vpre>450 V
With
Vpre=0.181 x MD 1136 x MD 1142 x MD 1119
MD 1132: Rated motor voltage
MD 1400: Rated motor speed
MD 1142: Threshold speed field weakening
MD 1136: No–load motor current
MD 1119: Inductance series reactor
Remedy
Correct error when entering
– Rated motor voltage MD 1132 or:
– No–load motor voltage MD 1135 or
– Rated motor speed MD 1400 or
– Rotor resistance cold MD 1138
– Threshold speed field weakening MD 1142 or
– No–load motor current MD 1136.
Note
Applies as from SW 6
Motor no-load current x 0
300785
Scan
Power–up and cyclic
Effect
MSD only:
– Pulse suppression, motor coasts down
– SIMODRIVE_READY and DRIVE_READY are canceled.
Explanation
Motor no–load current MD 1136 is smaller than or equal to zero.
Remedy
Correct the error when entering the motor no–load current MD 1136.
Note
Applies as from SW 6
Field weakening speed x 0
300786
Scan
Power–up and cyclic
Effect
MSD only:
– Pulse suppression, motor coasts down
– SIMODRIVE_READY and DRIVE_READY are canceled.
Explanation
Field weakening speed MD 1142 is smaller than or equal to zero.
Remedy
Correct the error when entering the field weakening speed MD 1142.
Note
Applies as from SW 6
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SINUMERIK 840C / SIMODRIVE 611–D (DA)
1 Alarms
1.5.1 Alarm description
Reset key
Reset key
Reset key
Reset key
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