Timers and Counters in PLCs

You have explored the architecture of Allen Bradley PLCs and the core instructions that these PLCs have including the basic relay instructions, latch and unlatch instructions, one shots, timers, and counters. In this discussion, you will focus on timers how Allen Bradley PLCs and Siemens PLCs use timer instructions and the ample differences in these two PLCs implement timers. 

  Explain Timers as a logical device. How does Studio 5000 implement Timers as a PLC instruction? What are the different types of Timers in Studio 5000? Explain their input and output signals.