Siemens SIMATIC C7-613 Manual page 59

FBs for the HMI Functions
• FB "HMI API"
The FB "HMI API" contains the following functions for executing the HMI
functions:
– Loading the screens, messages, and info texts to the memory of the
integrated HMI module of the C7-613
– Screen display
– Message display
– Info text display
– Executing control requests
– Transmitting keyboard and LED states
– Managing passwords
The contents of the screens, messages and info texts are created by using the
configuration interface. The parameters are stored in the "CONFIG",
"SCREEN", "MESSAGE" and "INFO" DBs (not relevant for sequence)
• FB "HMI EVENT"
If you want to generate messages for your application, you will also need the
"HMI EVENT" FB. It handles incoming messages and their acknowledgement.
For each message, the following information is provided:
– Message text
– Date and time
– "Coming, going, acknowledged" status
As an option, you can set up the "EVENT_BUFFER" DB to save the event
buffer to the MMC.
• FB "HMI MENU"
You will need the "HMI MENU" FB only if you do not program the screen
hierarchy yourself. To this purpose you specify the screen hierarchy in the
"MENU" DB by means of the configuration interface. The screens can be
changed by using the softkeys and the cursor keys. When a key is pressed, the
"HMI MENU" FB evaluates the information in the "MENU" DB and displays the
corresponding screens.
C7-613 Control System
A5E00138934-03
Integration into the User Program
4-3