Program explanation:
1. In the external interruption program, count the X2 input, when the X2 is 30, set ON
M0
2. In the main program, it controls the Y0 according to the M0 state.
3. When the robot action is completed, X1 changes from OFF to ON once, RST works,
Y0 and C0 are reset, M0 is OFF, wait for the next packing process.