Design for traffic light control program based on increment and comparison instruction

摘要

The traffic light procedure is a classical case using in the pic. It is commonly used for Timers and Step Ladder instruction (STL) to implement in reality. It has a complicated procedure with a low implementing rate. This article uses the increment and the comparison instructions to implement. In concert with the s7-1200 as the design background, the portal software can help the procedures become more straightforward and flexible.