Answer to Question #269053 in Chemical Engineering for Ash

Question #269053

When doing a PLC project, there are 5 steps that are typically followed. Please list and describe these steps in your own words.

Expert's answer

Five Steps to PLC Program Development

Step 1 – Define the task

Step 2 – Define the Inputs and Outputs

Step 3 – Develop a logical sequence of operation

Step 4 – Develop the PLC program

Step 5 – Test the program"."

In step 1, the operation to be done is written down and summarised. It is better to also make inquiries from several people on how the machine should operate.

In step 2, you as the operator have to determine the inputs and outputs to the PLC required to develop what has to happen.

In step 3, most of time is spent in the program development. It is also the easiest stage to modify and edit the program. Based on the logic, you may have to modify the sequence of the program.

In step 4, you the operator get to actually write the plc program.

In step 5, the logic developed will be tested. This is an important step to test for all conditions of the logic (e.g Power Cycle, Sensors Fail, Safety, etc.)

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