1. Basic Program Design Examples 1.16 Selective Execution of Programs Green Yellow Blue X3 Y0 Y1 Yellow Blue X1 X2 Color Selection X0 Control Purpose: z There are pigments of 3 colors. By controlling different switches, operators can fill the cans with corresponding pigments. Devices: DVP-PLC Application Examples 1-19 Device Function X0 Filling Start switch. X0 will be ON when turned on. X1 Yellow control switch. X1 will be ON when turned on. X2 Blue control switch. Turn it on, X2 will be On X3 Green (mixing of yellow and blue) control switch. X3 will be ON when turned on Y0 Yellow control valve Y1 Blue control valve