Siemens Sinumerik 840C Diagnostics Manual page 210

1 Alarms
1.5.1 Alarm description
300727 Reactance <= 0
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
The stator reactance MD 1139 or rotor reactance MD 1140 or magnetizing reactance MD 1141 is less than or
equal to zero.
Remedy
Eliminate error on inputting MD 1139, MD 1140 or MD 1141.
Note
Applies as from SW 4
300728 Torque/current matching factor too large
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
The matching factor (set torque ³ cross current) in the speed controller is too large.
Explanation
Remedy
Eliminate error when inputting
S
Rated motor current MD 1103, or
S
Limit current transistor MD 1107, or
S
Torque constant MD 1113.
Note
Applies as from SW 4
300729 Motor zero-speed current <= 0
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
Motor zero-speed current MD 1118 is less than or equal to zero.
Remedy
Eliminate error on inputting the motor zero-speed current MD 1118
Note
Applies as from SW 4
300730 Rotor resistence invalid
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
Rotor resistence is less than or equal to zero or format overflow has occurred.
Remedy
The following machine data can have an incorrect value:
S
Torque controller clock pulse MD 1001
S
Rated motor frequency MD 1134
S
Rotor resistence cold MD 1138
S
Stator stray reactance MD 1139
S
Rotor stray reactance MD 1140
Note
Applies as from SW 4
300731 Rated power <= 0
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
Rated power MD 1130 is less than or equal to zero.
Remedy
Eliminate error on inputting the rated power MD 1130.
Note
Applies as from SW 4
300732 Rated motor speed <= 0
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
Rated motor speed MD 1140 is less than or equal to zero.
Remedy
Eliminate error on inputting the rated motor speed MD 1140.
Note
Applies as from SW 4
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Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
04/96
POWER ON
POWER ON
POWER ON
POWER ON
POWER ON
POWER ON