15. Handy Instruction Design Examples Program Description: z The program uses Auto/Manual control instructions (IST) to perform auto control process of PCB electroplating. When IST instruction is applied, S10 ~ S19 can not be used as general step points, but only can be used for zero return. When S0 ~ S9 are in use, S0 ~ S2 are specified for manual operation mode, zero return mode and auto operation mode. Therefore, the content of the 3 steps should be designed first in this program. z When zero return mode is selected, no zero return action will occur if any step between S10 ~ S19 is ON. When auto mode is selected, no action will occur if any step in Auto mode is ON or if M1043 is ON.
DVP-PLC Application Examples 15-17