//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH008.3D – 98 – [91–104/14] 19.6.2004
9:09PM
Simulation and monitoring procedure
1. Display and monitor the Ladder Diagram PNEU1.
2. Operate the Input Switches X1, X2 and X4.
This will simulate the operation of the stop push button and the A and Blimit
switches.
3. Momentarily operate the Start Switch X0.
Output Y0 will now be energised and this will cause Piston A to operate to the A þ
position.
In a real situation with Piston A moving forward, its limit switches X2 would open
and X3 would close.
4. Open X2 and Close X3.
This will cause Output Y1 to energise and hence enable Piston B to move forward
to its Bþ position.
5. Open X4 and Close X5.
Auxiliary Output M1 will energise and