4 Step Ladder Instructions 3. Repeated Use of Output Coil: a) You can use output coils of the same No. in different steps. b) See the diagram in the right. There can be the same output device (Y0) among different statuses. Y0 will be On when S10 or S20 is On. Such as right diagram, there is the S10 S Y0 same output device Y0 in the different state. No matter S10 or S20 is On, Y0 will be On. X0 c) Y0 will be Off when S10 is transferring to S20. After S20 is On, Y0 will output again. Therefore in this case, Y0 will be S20 S Y0 d) Normally in a ladder diagram, avoid repeated use of an On when S10 or S20 is On. X1 output coil. The No.
of output coil used by a step should also avoid being used when the step ladder diagram returns to a general ladder diagram. 4. Repeated Use of Timer: The timers in EH2/SV series MPU are the same as general output points and can be repeatedly used in different steps. This is one of the features of the step ladder diagram. S20 However, in a general ladder diagram, it is better not be repeatedly use the output coil. Also avoid using the No. of the X1 output coil used by a step after the step ladder diagram returns S30 to a general ladder diagram. X2 Note: See the figure in the right. The timers in ES/EX/SS/SA/ S40 SX/SC series MPU can be used repeatedly in non-adjacent steps.
DVP-PLC Application Manual 4-5 SET Y1 SET S20 SET S30 TMR T1 K10 TMR T2 K20 TMR T1 K30