Servilink Systems Project Engineer Interview Questions and Answers

A PLC program is used to control industrial processes by programming logic sequences.

• PLC programs are written using ladder logic, function block diagrams, or structured text.

• Inputs and outputs are defined in the program to control machinery and equipment.

• Programs can include timers, counters, and other logic functions to automate processes.

• Example: A PLC program to control a conveyor belt system by starting and stoppin

A PLC program using a TOD Timer

• Use the TOD (Time of Day) Timer instruction in the PLC program

• Set the timer parameters such as preset time, enable bit, and timer done bit

• Use the timer done bit to trigger specific actions in the program

• Example: Set a TOD Timer to turn on a motor for 10 minutes every day at 8:00 AM