Question

3- [15 Marks] Design a LD for the process below to control a double acting cylinder using two solenoid valve A for extraction and B for retracting through Start PB, hence interlock should be added to your diagram, +24V o Start PB EN 1 LS2 LS2 LSI LSI 1 1 A1 OV o iva iyo +24V 1v1 2001 12 13 14 15 16 17 18 ZAZI OV 21 22 23 04 05 06 07 08 OV ov O

Answer 1

>> Wiring diaqram 4247 K K 152 LSI KA OV A B Control Relay I0-00 +24V (CR Hontrol relay 0:010 Ladder Diagram 10.03 И START STOP 4:1 0-010 10:01 가 0:010 LS) 10.02 HE 0-010 LS2 CAH Extraction (BH Retracting Descriptima As start button is pressed, then control relay is activated At Home position of cylinder, Ls 2 is changed its position from NC to NO, & LSI is at NC position, Both 'limit Switches are NC limit switches, When CR energized then coil A for extraction is energized through LSI e as cylinder reaches at position of is 1 then Lsiposition changed from Neto Mo, hence extraction coil A denergized, at the same time LS2 also changed to Ne from NO & Coil B energized, which will retrach Cylinder to home position d again cycle repeated till stop button is pressed.