at a predele worker on the floor will the and place it in the kit. The circu follows: The operation of this system can be summarized as follows: pushbutton station is used to The conveyor is started by pressing the start button. stop spool motor drive on and off . A throu through-beam sensor counts the resistors in each kit) will automaticall .A second counter is provided to count the . As each box passes the photoelectric sensor. a .When the preset value is reached (in this . The forklift operator removes the loaded pallet. resi count is registered. they pass by case 12), the conveyor belt turns off. A counter preset for 100 (the amount of After the empty pallet is in position, the forklif operator presses the remote reset button, which then starts the whole cycle over again. the take-up spool when the accumulated reaches 100. total used. . Manual reset buttons are provided for each counter 11. Write a program that will latch on a light 20 an input switch has been turned on. The timer w continue to cycle up to 20 s and reset itself unti the input switch has been turned off. After the ta time the timer has timed to 20 s, the light will be unlatched. 12. Write a program that will turn a light on whena count reaches 20. The light is then to go off a count of 30 is reacheu 3. Write a program to implement the box-stacking process illustrated in Figure 8-46. This applic tion requires the control of a conveyor belt thi feeds a mechanical stacker. The stacker can sta various numbers of cartons of ceiling tile onto each pallet (depending on the pallet size and preset value of the counter). When the requn number of cartons has been stacked, the co is stopped until the loaded pallet is remo an empty pallet is placed onto the loading photoelectric sensor will be used to pruussesb to provide av pulses to the counter after each carton p In addition to a conveyor motor a remote reset button is provided ta forkli operator to reset the system fromdng start/stop statin the an empty pallet is placed onto the lo at a predele worker on the floor will the and place it in the kit. The circu follows: The operation of this system can be summarized as follows: pushbutton station is used to The conveyor is started by pressing the start button. stop spool motor drive on and off . A throu through-beam sensor counts the resistors in each kit) will automaticall .A second counter is provided to count the . As each box passes the photoelectric sensor. a .When the preset value is reached (in this . The forklift operator removes the loaded pallet. resi count is registered. they pass by case 12), the conveyor belt turns off. A counter preset for 100 (the amount of After the empty pallet is in position, the forklif operator presses the remote reset button, which then starts the whole cycle over again. the take-up spool when the accumulated reaches 100. total used. . Manual reset buttons are provided for each counter 11. Write a program that will latch on a light 20 an input switch has been turned on. The timer w continue to cycle up to 20 s and reset itself unti the input switch has been turned off. After the ta time the timer has timed to 20 s, the light will be unlatched. 12. Write a program that will turn a light on whena count reaches 20. The light is then to go off a count of 30 is reacheu 3. Write a program to implement the box-stacking process illustrated in Figure 8-46. This applic tion requires the control of a conveyor belt thi feeds a mechanical stacker. The stacker can sta various numbers of cartons of ceiling tile onto each pallet (depending on the pallet size and preset value of the counter). When the requn number of cartons has been stacked, the co is stopped until the loaded pallet is remo an empty pallet is placed onto the loading photoelectric sensor will be used to pruussesb to provide av pulses to the counter after each carton p In addition to a conveyor motor a remote reset button is provided ta forkli operator to reset the system fromdng start/stop statin the an empty pallet is placed onto the lo
