Question

Downloading means
1. Transferring programs from a programming device to a PLC
2. Transferring programs from one PLC to another PLC
3. Transferring programs from memory to PLC's CPU
4. Transferring program from output device to PLC

Answer 1

Correct Answer - Option 1 : Transferring programs from a programming device to a PLC

Explanation:

In the PLC world,

• Upload means transfer from the controller (PLC) to the PC.
• Download means transfer the program from the PC to the controller (PLC).

 

Programmable Logic Controller (PLC):

• It is an industrial computer control system that continuously monitors the state of input devices and makes decisions based upon a custom program to control the state of output devices.
• Almost any production line, machine function, or process can be greatly enhanced using this type of control system. However, the biggest benefit of using a PLC is the ability to change and replicate the operation or process while collecting and communicating vital information.
• Another advantage of a PLC system is that it is modular. That is, you can mix and match the types of Input and Output devices to best suit your application.
• While Ladder Logic is the most commonly used PLC programming language. Ladder Diagram (LD) Traditional ladder logic is a graphical programming language. Initially programmed with simple contacts that simulated the opening and closing of relays,
• Ladder Logic programming has been expanded to include such functions as counters, timers, shift registers, and math operations.
• A PLC would be used for the automation of industrial electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or food processing.