Dick Morley is considered by many to be the father of the programmable logic controller (PLC). His involvement with the creation of the first Modicon PLC for General Motors in 1968 was a historic step in the development of industrial controls.

We had the chance to sit down with Morley and ask him a variety of questions. In this fourth installment of our series, Morley explains the difference between the PLC and the PAC.

Watch the previous three installments here: 

• The father of the PLC talks about the Internet of Things

• The father of the PLC explains its birth

• The father of the PLC explains the difference between the PLC and PC-based control