Iunit_Block; Iunit_Block: Unit Allocation - Batch Interface - Siemens SIMATIC PCS 7 Function Manual

BATCH interface blocks

2.4 IUNIT_BLOCK

2.4 IUNIT_BLOCK
2.4.1

IUNIT_BLOCK: Unit Allocation - BATCH Interface

IUNIT_BLOCK: Unit allocation - BATCH interface
Object name (type + number)
FB 251 (Page 38)
Calling OBs
The OB in which you install the block (for example, OB1).
Funktion
Using IUNIT_BLOCK, batch control coordinates the allocation of individual units to the active
batches. An IUNIT_BLOCK, an instance in one of the charts of the hierarchy folder, is
required for each unit. The unit name is configured at the UNIT_NAME input.
How the block functions
● Occupy / enable
● Status word
34
To occupy a unit, the batch control sets the OCCUPIED = 1 identifier. It also enters the
following as occupation information:
– Batch name, batch ID (UBA_NAME, UBA_ID),
– recipe name, recipe version, formula (URP_NAME, URP_REL, FORMULA),
– material name and ID (MAT_NAME, MAT_SP) of the product manufactured with the
batch.
The block is only occupied if it is enabled for BATCH (BA_EN = 1) and if there is no
active group error (status word bit 31 = 0).
The OCCUPIED = 0 ID is set when the block is enabled. In addition, the batch name
and ID are reset. The other occupied information for the product is retained and can
be taken into account in the user program and in the planning of further batches. A
process with the same product does not require the interconnection of a cleaning
batch, for example.
The status of IUNIT_BLOCK is returned in status word Q_STATUS and monitored by
BATCH.
SIMATIC BATCH Interface Blocks V7.1
Function Manual, 03/2009, A5E02171101-01