Lesson 2: PLC Programming

Question 1

List the methods in programming PLC.

Answer 1

1. Ladder Diagram
2. Statement List (Mnemonics)

Question 2

sets of symbols that are commonly used in PLC ladder logic diagrams that represent control components and instructions.

Answer 2

PLC Ladder Symbols

Question 3

this programming is in text form using the STL Instruction lists. It is preferred by programmers whore are familiar with other programming languages.

Answer 3

Statement List (Mnemonics)

Question 3

uses contacts and coils and very popular to people who are used to working with contactors and relays.

Answer 3

Ladder Diagram

Question 3

3 basic rules in PLC programming:

Answer 3

1. A coil must be inserted at the end of the rung/network.
2. All contacts must run horizontally. No vertically oriented contacts are allowed.
3. Only one output may be connected to a group of contacts.

Question 4

represent the contacts of the pushbutton, relay, limits switches, overlay relay, etc.

Answer 4

The contacts

Question 5

represent energized relays or outputs when power flows through them.

Answer 5

coils

Question 6

Also represents the input part of your Ladder Programming.

Answer 6

contacts