As you know, the maximum amount of time that you can use on S7 or SIMATIC timers for timing is 2 hours 46 seconds. If you need larger timing values, one of the options might be using the IEC timers.
If you're not interested in using IEC timers, the other option is to build your own customized timer by combining S7 timers with S7 counters.
In the previous lessons, I wrote a PLC program that could easily extend timing to the desired amount for S7 timers by combining these timers with S7 counters. In this lesson, I'm going to write another PLC program with similar functionality but this time, I will make use of comparator operations as well.