PLC Count-Up instruction

  1. List 5 application where count up instruction (up-counter) in a PLC is used?
  2. Explain why reset instruction is used along with count-up instruction.
  3. Explain the working of count-up instruction along with its timing diagram.
  4. Choose any one variant of PLC in all major PLC manufacturing company and find out how many counters are present in each of them.