the technology of flying saw is so easy do by Technology CPU. You could read some document first.

FYI.

1. Technology CPU 31xT-2 DP: Flying shears with print-mark synchronization based on gear synchronism
http://support.automation.siemens.com/CN/view/en/21063352

2.Technology CPU 31xT-2DP: Technology Template "Flying shears"
http://support.automation.siemens.com/CN/view/en/21062270

3. "S7-Technology" manual.
http://support.automation.siemens.com/CN/view/en/22639716