4 Step Ladder Instructions Example: S10 S10 S Y0 S Y0 X0 When X0=On, S20 = On, S10 = Off. X0 S20 S Y10 S20 S Y10 X1 X1 Explanation: When S10 = On, Y0 and Y1 will be On. When X0 = On, S20 will be On and Y10 will be On. When S10 = Off, Y0 will be Off and Y1 will be On. 2. Timing Diagram of Step Ladder: When the status contact Sn = On, the circuit will be activated. When Sn = Off, the circuit will be inactivated. The actions will delay for 1 scan time. S10 S Executing the timing diagram below. After the status of S10 and S12 are transferred (taking place S12 simultaneously), and after a delay of 1 scan time, S Y10 will be Off and Y11 will be On. There will not be overlapping outputs.
STL S10 Ren ew Input/Out put S10 Y10 X0 S12 Y11 X1 DVP-PLC Application Manual 4-4 SET Y1 SET Y1 SET S20 SET S20 SET S30 SET S30 0 Y10 X0 SET S12 SET S12 2 Y11 X1 SET S14 SET S14 Pro gram execution Pro gram execution Pro gram execution