用K0-K2做为通电方式选择键，K0为三相单三拍，K1为三相双三拍，K2为三相六拍；K3为启动/停止控制；K4方向控制（正反转）；K5速度控制（快慢两档）；用4位LED数码管显示工作步数。用3个发光二极管显示状态：正转时红灯亮，反转时黄灯亮，不转时绿灯亮。-Use K0-K2 as energized mode selection keys, K0 is a three-phase three single, K1 is a three-phase double three beat, K2 is a three-phase six beat　 K3 for start/stop control　K4 direction control ( positive )　 K5 speed control ( speed two )　 with 4 LED digital tube display work steps. With 3 light emitting diode display status : forward when the red light, a reversal of the yellow light, does not turn when the green light.