How to Program Function Key through PI Studio

1.General
Function key can implement functions like switch between different screens, copy data to UDisk, file transfer, etc.
This project shows some functions of Function Key, such as switch screen, open and close sub-screen, and copy data to U disk.
2.Function Key settings
This sector introduces the [General] settings of Function Key. [Text], [Graphic], [Security] and [Animation] settings are the same as other objects. The setting screen as Figure 1 shows.
Function key can implement functions like switch between different screens, copy data to UDisk, file transfer, etc
1)Screen No.: Switch to the selected screen, but this screen must be based screen;
2)Open sub screen: Open to the selected sub-screen;
3)Previous: Switch to previous screen, for example, now HMI displays No.3 based screen, when click this function key, HMI will switch to No.2 based screen;
4)Next: Switch to next screen, for example, now HMI displays No. 3 based screen, when click this function key, HMI will switch to No. 4 based screen;
5)Go Back: Switch to last screen, for example, now HMI displays No.3 based screen, but before it, HMI displayed No.5 screen, when click function key, HMI will switch to No.5 screen again;
6)Close sub screen: Close the current sub-screen;
7)Instalment screen: Open instalment screen;
8)FLASH data to U Disk: Transfer data (data record files and alarm record files) from FLASH to U disk for data backup.
9)SD data to U Disk: Transfer data (data record files and alarm record files) from SD card to U disk for data backup.