Siemens alarm 300614: Axis %1 drive %2 time monitoring of motor temperature
SINUMERIK 840D/810D powerline drive alarm (SIMODRIVE 611D) · SIMODRIVE 611D/611U
What it means
Motor temperature measured via KTY84 sensor (fed through the motor encoder cable) exceeded MD1602 warn limit longer than permitted by MD1603; drive brakes regeneratively and inhibits pulses.
Likely causes
- genuine motor overload / aggressive acceleration
- blocked or failed motor fan
- winding fault in motor
- KTY84 temperature sensor fault or broken conductor in motor encoder cable
- defective 611D control module evaluating the sensor
- incorrect motor data (MD1102 motor code)
Triage note: Compare realistic temperature reading vs r0035-equivalent drive value; unrealistic readings indicate sensor/circuit, not thermal overload.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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motor fan kit (self-ventilated motors 1FT6/1FT7/1PH)
motor blower/fan · Primary suspect
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6FX5002-2E…
motor encoder cable (carries KTY84 leads) · Common cause
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motor (1FT6/1FT7/1PH series)
motor with integrated KTY84 (winding/sensor fault) · Common cause
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6SN1118-…
SIMODRIVE 611D control board · Check if others ruled out
Need the part urgently?
Send us alarm 300614 with your machine details — typical RFQ turnaround is 24–48h.