E251 Motor Overtemperature Warning電機過熱警告
Description:說明：
As soon as the temperwature warning threshold (145°C) is exceeded,
warnig E251 is generated and the drive complies with the command
value.一旦超過溫度警告閾值（145°C），warnig E251生成，驅動器符合命令價值
This state can last infinitely without a powering down occurring.
這種狀態可以無限持續，而不會發生斷電。
Not until the temperature error threshold is exceeded will an immediate powering down take place.
直到超過溫度誤差閾值，才會立即斷電。
See also F219 Motor Overtemperature Shutdown
另請參閱F219電機過熱停機
Cause:原因：
The motor became overloaded.
電動機過載了。
The effective torque required of the motor was above the allowable standstill continuous torque for too long.
電機所需的有效扭矩超過允許的靜止連續扭矩太長時間。
Remedy:解決措施：
Check the installation of the motor.
檢查電機的安裝情況。
For systems which have been in use for a long time, check to see if the drive conditions have changed (inregards to pollution, friction, components which have been moved, etc).對于長期使用的系統，檢查驅動條件是否發生了變化（導致污染、摩擦、部件移動等）。
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