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控制器一直是有報錯，E6D，錯誤碼解釋為Drive-source cutoff relay error.

錯誤解釋：The drive-source cutoff relay may have melted.
This error occurs on QX type controllers. When turning on the power, turn on the
control power first, confirm that the SDN contacts are closed, and then turn on the
drive power. (This error will occur if the control power and drive power are turned on
simultaneously.)
我是先開的控制器電源，再接通伺服驅動電源，還是出現這個

驅動源切斷繼電器可能已熔化