SFC optimization in conjunction with the IEPH block
The IEPH block forms a BATCH interface in the automation system. An SFC chart is
interconnected with the IEPH. You also have the option of developing your own blocks to take
over tasks from an SFC.
In terms of timing, optimum processing of step changes can only be achieved in conjunction
with an SFC type or an IEPH/SFC pair. SIMATIC BATCH supports the use of a user block with
the IEPH, but this can lead to a longer step change time under certain circumstances.
Rules for the interface blocks IEPH/IEOP
● The IEPH, IEOP interface blocks for controlling the process must be inserted in sequences
before the processing block in the CFC chart.
● The IEPH block is used with a recipe step of the type equipment phase, the IEOP is used
with a recipe step of the type equipment operation.
● The phase/operation type name is derived from the F_TYPE input of the IEPH/IEOP block.
Rules for interconnecting the IEPH/IEOP interface blocks and the SFC chart
● To pass control commands from SIMATIC BATCH to the SFC, the following
interconnections between IEPH, IEOP and the SFC external view must be configured:
IEPH/IEOP SFC external view
QBA_EN (OUT) BA_EN (IN)
VSTEP_NO (OUT) STEP_NO (IN)
VBA_ID (OUT) BA_ID (IN)
VBA_NAME (OUT) BA_NA (IN)
Q_OCCUPI (OUT) OCCUPIED (IN)
QSTART (OUT) START (IN)
QHOLD (OUT) HOLD (IN)
QSTOP (OUT) STOP (IN)
QABORT (OUT) ABORT (IN)
QRESET (OUT) RESET (IN)
QTERM (OUT) COMPLETE (IN)
QCONT (OUT) CONT (IN)
● The equipment procedural element must return the actual status to SIMATIC BATCH. This
requires the following interconnection:
SFC external view IEPH/IEOP
BA_STATE (OUT) USTAT_L (IN)
● The IEPH and IEOP blocks map the RESUME command to the START command. The
RESUME I/O remains unconnected. The SFC chart interprets START independent of its
actual status as START or RESUME respectively.
Engineering
7.1 Basic engineering for PCS 7
SIMATIC BATCH V8.2
152 Operating Manual, 02/2016, A5E35958174-AA
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