Generation - Siemens SIMATIC PCS 7 Function Manual

Archive management
8.1 FB_XXXA (FB_XXXAI, FB_XXXAR)
8.1.2

Generation

Using the APF Engineering Tool, the following blocks are generated on the basis of the
"FB_XXXA" (FB1793) block for each archive group created:
FB_XXXAI
FB_XXXAR
The "FB_XXXAI" and "FB_XXXAR" blocks differ in their display of format-related numerical
values for FORMAT= 54 and 70. These values are displayed as INTEGER (32-bit) in
FB_XXXAI and as REAL in FB_XXXAR. The two blocks write to the same archive (as DOUBLE
64-bit).
The input and output parameters of the function blocks depend on the structure of the
"FB_ARCHIVING_XXX" user archive. The blocks are numbered consecutively in line with the
user archives.
The figure below provides an overview of the "FB_XXXA" block structure:
212
Function block (FB) Number
Specified by the "FB Number
(I)" field of the APF engineer‐
ing tool
Specified by the "FB Number
(R)" field of the APF engineer‐
ing tool
Function
Creates, updates, and deletes archive
data records of format "INTEGER (32)"
(for format-related numerical values)
Creates, updates, and deletes archive
data records of format "REAL" (for for‐
mat-related numerical values)
Advanced Process Functions (APF)
Function Manual, 07/2016, A5E38719883-AA