69864408_WinCC_TimeSyn_DOC_v40_en.pdf - Time Synchronization with an HMI Operator Panel and a SIMATIC PLC WinCC V13 SP1, Comfort Panels, S7-1200/S7-1500 and S7-300/S7-400
The example describes how to configure an S7 connection between an S7-1500 CPU and an S7-1200 CPU to exchange data between the S7-1500 CPU and the S7-1200 CPU using the PUT and GET instructions.