1. Basic Program Design Examples 1.11 Conditional Control Circuit Y0 X0 START STOP X2 Oil Pump Motor X3 Oil Pump Motor X1 Y1 Main Motor START STOP Control Purpose: Main Motor z Providing lube for the gear box before the lathe spindle starts to run which aims to ensure that the oil pump motor starts first and the main motor starts subsequently. Devices: Control Program: X0 X2 Y0 Y0 X1 X3 Y0 Y1 Y1 Program Description: z This program is a typical application of the conditional control circuit. Y0 = ON when Oil Pump START button is pressed.
Therefore, the oil pump will start to provide lube for the gear box of main motor(Y1) z Under the precondition of the operating state of the Oil pump, the main motor (Y1) will be z During the operation of main motor (Y1), oil pump (Y0) needs to provide lube continuously. ON when the Main motor START button is pressed. z The oil pump will be stopped when Oil pump STOP button X2 is activated, and the main motor will be stopped when Main motor STOP button X3 is activated. DVP-PLC Application Examples 1-12 Device Content X0 Oil pump START button. X0 will be ON when pressed. X1 Main motor START button. X0 will be ON when pressed. X2 Oil pump STOP button. X2 will be ON when pressed.
X3 Main motor STOP button. X3 will be ON when pressed. Y0 Oil pump motor Y1 Main motor