S7 Trends is a free and easy-to-use software to trace what is going on in Siemens PLC. You can watch & record in real time the state of all types of variables:
- Markers
- Inputs/Outputs
- Timers
- Counters
- Databases
It is written in C# and it is using Snap7 library. It should work also with S1200.
Current state is stable.
If you encounter any problems or you have any idea for a new feature - write a review https://sourceforge.net/projects/s7-trends/reviews/new
Testing and criticism is very...