8. Rotation and Shift Design Examples Program Description: z Every time the cam rotates once, the product will be moved from one position to another position. X4 will be activated to execute SFTL instruction once. The content in M0~M4 will be shift to left for one bit and the state of X0 will be sent to M0. z When X0 = ON (defective products detected), the value “1” will be sent to M0 and achieve the 5 th position after 4 times of shift. In this case, M4 = ON and the electromagnetic valve Y0 will be ON to push the defective product into the recycle box. z When the falling of the defective product is detected, X5 will be activated to execute [RST Y0] and [RST M4] instructions.
Y0 and M4 will be reset. The electromagnetic valve will be OFF till next defective product is detected. z When RESET is pressed, X6 will be activated to reset M0~M4, so as to ensure that the system restart the detecting process when the memory which records defective products is in disorder. DVP-PLC Application Examples 8-4