1 Preparation a) Read the instructions provided and show the scaling calculations to be implemented in the PLC program using Data conversion and Math functions for this lab (5 marks)

Please create the drawing for this, thanks.

Background Information: Commercial bread toasters are used in restaurants, hotels or anywhere that serves a lot of toast within a short period of time. A simple commercial bread toaster contains a small steel conveyer belt, a high power heater in an oven, and a collector tray at the end. The bread is loaded into a feeding area at the front of the toaster, the conveyor draws the bread through the heating oven elements towards the back of the unit, and the toasted bread will be ready at the end on a conveyer belt. Operators start the conveyor belt by pressing a NO pushbutton named START. The conveyor belt keeps running until an operator presses an NC pushbutton which is called STOP. There are two proximity sensors installed at both ends of the toaster oven. The feeding proximity sensors are NO contact sensor. The heater is OFF until bread enters the toaster, then the heater must turn ON after adjustable 2 sec- 6 sec delay. The timer used is called Delay_timer. The heater remains ON for adjustable 5.5 to 10.5 sec (timer used for this is called ON_timer. Both sensors transmit signals for a short period of time when an object is in front of them. When the conveyor belt is OFF, operator may clean the conveyor belt, sensors, or oven. This does not mean the bread moved in or out of the oven. If the belt has stopped, the heater should stop even if there is a bread in the oven. When the belt restarts, the heater should resume if there is still bread in the oven. Sometimes a sensor may break, transmit, or malfunction. Both sensors cannot transmit active signals simultaneously when the belt is running. In the default situation, PROX_1 is OPEN and PROX_2 is OPEN. We assume a loaf of bread must completely leave the oven before the next loaf enters. This means it is not possible to have PROX_1 closed and PROX_2 open simultaneously when the belt is running. This combination is considered as a broken sensor and you need to stop the system immediately. The system remains off until the faulty condition has been addressed and the start button is pressed. You need to set an output when a fault occurs. The fault light remains ON until the stop button is pressed.

List of input tags: START (NO), STOP (NC), PROX_IN (NO), PROX_OUT (NO)

List of output tags:

BELT, HEATER, FAULT

Please create the drawing for this, thanks.