Siemens SIMATIC PCS 7 Function Manual page 10

BATCH interface blocks
2.1 IEPH
The IEPH block allows the following status changes:
Operating principle
● Allocate / Enable
● Control commands
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A recipe step can occupy the block by setting the identifier OCCUPIED = 1. It also enters
an occupied information based on the batch name, batch number, the step number
(UBA_NAME, UBA_ID, USTEP_NO) and, if necessary, the step monitoring time
(STEP_T). The block is only occupied if enabled for BATCH (BA_EN = 1), if set to auto
mode (status word bit 17 = 1), and if there is no active group error (status word bit
31 = 0).
The block is controlled by way of the ISTART, IHOLD, IABORT, ISTOP, ITERM, IRESET
(for interconnection in CFC) control inputs, or by means of control word ICTRL (used only
in BATCH). The active control commands can be read from the corresponding outputs,
for example, QSTART and QHOLD. Control word ICTRL enables the consistent writing of
control commands in BATCH. Example: ICTRL = 1 ensures that ISTART = 1 and
IHOLD = 0 are written simultaneously. The control inputs are reset automatically after the
corresponding end status was reached (reset of ISTART at the positive of the RUNNING
bit in USTAT_L, for example).
SIMATIC BATCH Interface Blocks V7.1
Function Manual, 03/2009, A5E02171101-01