In a sequential control program, what role does the timer typically play?

In a sequential control program, the timer is fundamental to managing the timing and duration of operations. It provides the ability to introduce delays between different steps, ensuring that actions occur in a specific sequence at designated intervals. For instance, if an industrial process requires a certain action to happen, followed by a wait period before the next action is initiated, the timer facilitates this.

By measuring elapsed time, the timer can trigger the next step in the sequence once the programmed duration has passed. This is vital for maintaining control over processes that have strict timing requirements, such as in manufacturing or automation scenarios, where precision in timing can significantly impact efficiency and safety.