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It is presumed here that the water spray pumps are activated at the same time as the motor which rotates the rollers

Electrical Engineering

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It is presumed here that the water spray pumps are activated at the same time as the motor which rotates the rollers. You are not required to take this action into account! A 5) Forward movement of the gantry is stopped by the gantry forward limit switch. At this point, the gantry reverse command is given. The rollers still rotate; A 6) Gantry reverse operation AND rotation of the rollers are stopped by the gantry rear limit switch. A command is given to raise the horizontal roller up. At this point, the washing counter is updated; A 7) If required, a latching emg push button must stop the cycle at any time (emergency stop of all motors) and activate a buzzer and a 0.5/0.5 sec flasher. Throwing back the eng PB must interrupt the buzzer and flasher immediately. Operation then resumes from where it had been stopped. Use a single pole double throw (SPDT) mushroom PB for this purpose. 6.1) Establish a list of input and output field devices; 6.2) Develop a GRAFCET to solve the automation problem. Keep the original nomenclature when specifying triggers and actions; 6.3) Write the equations for transitions, steps and actions (Use Eq G4); 6.4) Transform the GRAFCET equations into a handwritten PLC ladder program in accordance with the Allen Bradley standards.