Siemens SIMATIC PCS 7 Function Manual page 172

Order management
7.1 FB_JOB
AS communication
Data exchange with the "FB_XXXPA" block on the AS level is performed via the
"UDT_PA_REQ_ST" (request) and "UDT_PA_CON_ST" (feedback) structures.
Up to 10 jobs can be managed in a job list. Each item in the job list is assigned an "FB_XXXPA"
function block (normal mode) in the AS. The "FB_XXXPA" block manages the parameter set
belonging to the job. A second "FB_XXXPA" block in multiplexer mode can copy the parameter
set of the activated job from the corresponding FB_XXXPA (normal mode) and manage it
(parameter set of the job in the job interface).
The following figure depicts the data communication:
FB_JOB
Note
The "FB_JOB" function block and all corresponding "FB_XXXPA" function blocks must be
located in the same block folder.
The "FB_XXXPA" function block in multiplexer mode must be assigned the name of the
"FB_JOB" function block plus the index 00. The function blocks in normal mode must be
assigned the name of the "FB_JOB" function block plus the index 01 to 10.
Example:
The name "FB_JOB" has been assigned to the "FB_JOB" function block in the CFC.
This results in the following naming convention in the CFC:
The "FB_XXXPA" function block in multiplexer mode has the name "FB_JOB00", and the
"FB_XXXPA" function blocks in normal mode have the names "FB_JOB01", "FB_JOB02,
"FB_JOB03, ..., "FB_JOB10".
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FB_XXXPA
FB_XXXPA
Function Manual, 07/2016, A5E38719883-AA
FB_XXXPA
Advanced Process Functions (APF)