The pass/fall parts count program, shown in Figure 11-34, is used to display the number of parts on a conveyor line that pass inspection. Its operation is summarized as follows: The main conveyor has...

The pass/fall parts count program, shown in Figure 11-34, is used to display the number of parts on a conveyor line that pass inspection. Its operation is summarized as follows: The main conveyor has a diverter gate which directs defective parts to a reject conveyor. If a part fails inspection, the diverter gate is energized and the part is routed onto the reject conveyor. Each conveyor has a limit switch used to count items as they pass by. The Subtraction (SUB) instruction is used to find the difference between the two count values and passes this data on to Data_Format_Conversion memory location where the value is converted to BCD format by the TOD instruction. The converted BCD representation of the result is then sent to the BCD_Output display which shows the running count for passed parts. Activating the Reset_PB will rest both counters. Prepare an I/O connection diagram and ladder logic program that will simulate its operation. Use addresses that apply to your PLC installation. Enter the program into the PLC, and verify its operation.