Siemens SIMATIC BATCH Operating Manual page 144

Engineering
7.1 Basic engineering for PCS 7
Use of SFC types
To provide better support for the type instance concept, an SFC type (= BATCH type block)
with parameters can be created for each equipment phase type. Each BATCH type block is
displayed in the "Other blocks" block library or the library of the family assigned to the SFC
type (for example Batch) of the CFC and can then be simply inserted in the CFC chart from
there.
Note
Mixed operation possible
Mixed use of both variants (SFC types, BATCH interface blocks) within a project is possible.
Note
Block I/Os
The block I/Os BA_ID_AC for PI/PO (parameters for input materials, parameters, major, minor,
intermediate, waste product) at interface modules or "name"_BX (setpoint tracking ID) at SFC
types are not used in SIMATIC BATCH.
Note
PC-based mode
In the PC-based mode, SFCs are read on the AS in the 1 s cycle. For this reason, in PC-based
mode, the status of the equipment phase may not change faster than once per second. The
status may be lost in the BATCH control server if this condition is violated.
Setpoints
Setpoints are updated by the recipe control of SIMATIC BATCH to influence the equipment
module.
Control strategies
Different and (in terms of the same run) mutually exclusive equipment phases/operations of
the same equipment module are known as control strategies of this equipment module.
Recipe phases/operations can be implemented with various control strategies (set of setpoints)
that can be used in the manual mode or in the automatic mode (recipe mode). To be able to
use the control strategies in the automatic mode, the recipe phases/operations must also be
capable of the control strategies. The control strategies and their corresponding setpoint
parameters are configured in the engineering system in the batch or SFC types. In the Recipe
Editor, the control strategies defined in this way are available as a set of setpoints with a control
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SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA