Siemens SIMATIC C7-613, Manual

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Integration into the User Program
4-4
C7-613 Control System
A5E00138934-03
Calling the FBs
The FBs are called with an associated instance DB.
Example: Call “HMI API”, DB 11
Note
If you have programmed one of the three HMI FBs in your program, do not call the
same FB again in a program section with a different priority class, since the FB
must not interrupt itself.
Example: It is not permissible to call an FB in OB 1 and then call the same FB in
the alarm OB.
Note
During operation, do not reload the instance DBs of the HMI FBs, since this
causes inconsistent data and undefined user program performance.
Note
The HMI module integrated in the C7-613 is addressed with input/output
addresses that are included in STEP 7/HW Config for the C7-613 panel
(integrated HMI module). These addresses must not be written to, since this can
cause undefined module performance.
Memory Requirement
User Memory :
If you use the FBs for the HMI functions, 16 KB of the 48 KB working memory are
required for these functions. The rest can be used for your user program.
Loading Memory (MMC):
The DBs with configuration data for screens, messages, and info texts are stored
only in the loading memory on the MMC and require the following memory:
• For process screens per language:
– For a maximum of 64 screens: 1 DB with 16240 bytes
– For more than 64 screens: 2 DBs with 16240 bytes each