Siemens SIMATIC PCS7 Manual page 227

BATCH flexible -specific block types
A.2
Batch flexible , Manual
C79000-G7076-C650-02
Three specific block types are available as interfaces between BATCH
flexible and basic control :
UNIT for equipment occupancy and allocation (see Page A-4).
AF_n for transferring setpoint and actual values between batch control
and automation function (see Page A-5).
TRANS for the transition conditions of the process variables (see
Page A-9).
As a further BATCH-specific addition to the standard function blocks the
corresponding I/O bar is shown on Page A-10.
Technical Data
A-3