Siemens SIMATIC BATCH Operating Manual page 360

BATCH Control Center
9.6 Batch Planning
Rule 1: Times in the tooltip, Gantt symbol, properties dialog and tree view
● In the case of non-chained batches, the displayed times are identical everywhere.
● If, in the case of chained batches, the planned starting time of a successor batch lies after
the end time of its predecessor batch, the displayed times are identical everywhere.
● If, in the case of chained batches, the planned starting time of a successor batch lies before
the end time of its predecessor batch, the planned start time is displayed in the properties
dialog. All other dialogs display the actual start time.
Rule 2: Start mode
● A batch in "Immediate" start mode is positioned in a chaining directly at the end time of the
predecessor batch and is started immediately after completion of the predecessor batch.
● If the planned starting time lies after the end time of the predecessor batch, a batch in "Time-
driven" start mode is started. If the planned starting time lies before the end time of the
predecessor batch, the chaining algorithm is used as the basis for positioning and starting.
● All batches in "Manual" start mode must always be started via an operator action, even if
they are chained. Therefore, the use of this start mode is recommended at most for the first
batch of a chain. All subsequent batches should have the "Immediate" or "Time-driven"
start mode.
Rule 3: Minimum intervals for chaining batches (GAP time)
● The GAP time guarantees a minimum interval between two chained batches.
● In the start mode "time-driven", a time-based offset t to the predecessor batch results,
depending on the planned starting time of the successor batch. At a configured GAP time
≥ t, the actual time offset corresponds to the GAP time; at a GAP time < t, the time offset
is equal to t, meaning that the successor batch starts at the planned starting time.
● In the start mode "immediately", the planned starting time does not play any role; the time-
based offset corresponds to the GAP time.
● At a manual start of a batch (chained or not), a configured GAP time is never considered.
Rule 4: Shifting in the Gantt chart
● Batches of a batch chain with the start mode "time-driven" or "manual" can be shifted in
the Gantt chart in both directions (menu Planning > Set batch order).
● A shift to the left is possible at the most up to the end time of the predecessor batch. In this
action, the planned starting time is always adapted.
● Shifting to the right is possible as far as you like. When the planned starting time of its
successor batch is reached, it and correspondingly all further ones are shifted to the right.
The planned starting time is updated for all the batches that are shifted to the right by this
action.
● In the start mode "immediately", only the first batch of a batch chain can be shifted to the
left or right.
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SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA