There are a few different ways: – via UniLogic: First, establish a PC-PLC connection. Next, select the PLC tab on the UniLogic ribbon, clicck UniStream Management, and select Set RTC. – via UniApps: Press and hold the top right corner of the HMI screen to enter UniApps, selectTime & Dateand edit the values. – Via the HMI Time & Date widgets Digital Timeand Digital Date.