Sinumerik Alarm 300730 Axis %1 drive %2 rotor resistance invalid
Parameters:
%1 = NC axis number
%2 = Drive number
Definitions:
The value in drive MD 1138: $MD_ROTOR_COLD_RESISTANCE (cold rotor resistance) is less than or equal to zero or a format overflow has occurred.
Reactions:
– NC not ready.
– Channel not ready.
– NC Stop on alarm.
– NC Start disable in this channel.
– The NC switches to follow-up mode.
– Alarm display.
– Interface signals are set.
Remedy:
Please inform the authorized personnel/service department. For standard motors: Reset the drive (delete the bootfile) and repeat the startup. For third-party motors: One of the following machine data may contain an invalid value:
• Modify MD 1001: $MD_SPEEDCTRL_CYCLE_TIME (speed controller cycle)
• Modify MD 1134: $MD_MOTOR_NOMINAL_FREQUENCY (rated motor frequency)
• Modify MD 1138: $MD_ROTOR_COLD_RESISTANCE (cold rotor resistance)
• Modify MD 1139: $MD_STATOR_LEAKAGE_REACTANCE (stator leakage reactance)
• Modify MD 1140: $MD_ROTOR_LEAKAGE_REACTANCE (rotor leakage reactance)
• Modify MD 1141: $MD_MAGNETIZING_REACTANCE (magnetizing reactance) Fulfill the condition according to the following formula: 16 * MD1001 * 0.00003125 * MD1138 * 2PI * MD1134 / (MD1140 + MD1141) < 1 Call the SIEMENS AG, SIMODRIVE Hotline.Program Continuation:
Switch control OFF – ON.
References
- Siemens Diagnostics Guide by Siemens