4DIN E,ZEIN A S. High performance PLC controlled stepper motor in robot manipulator. IEEE Intenmtional Symposium on Industrial Elec- tronics, 1996,2:974 - 978.
5WANG L H, ZHAO Y L. Design of stepping motor position closed loop control system based on PLC. Applied Mechanics and Materials, 2011,127:126 - 129.
6LIU W. Application of PLC pulse command in the step motor position control. Applied Mechanics and Materials, 2011,130 : 3954 - 3957.