Siemens SIMATIC BATCH Operating Manual page 366

BATCH Control Center
9.6 Batch Planning
Recipe header
Besides other data, the recipe header contains the standard mix as well as an upper and lower
recipe limit. All set parameter values set within the basic recipe are related to this standard
mix. The standard mix is normally set within the stipulated recipe limits. for flexibility, a standard
mix is also possible outside of the recipe limits for smaller and larger volumes although this
limits the intended support of the recipe manufacturer by the system. Such master recipes can
always be released.
Recipe step
All recipe steps (RUP, ROP, SUB, RPH) contain set values such as the process parameters,
materials used and raw materials. The following takes into consideration only those recipe
steps that accord to an EPH or EOP function block. within the automation system The set
values of these recipe steps have an upper and a lower limit (also referred to as parameter
limits) that are configured within the engineering system and can no longer be changed within
the basic recipe. For each set value, an individual configuration can be made as an option
when creating the basic recipes of whether the volume of this value is to be adjusted when
releasing the control recipe (possible volume adjustments: linear and quadratic).
Unit
A unit recipe contains a candidate list of used units. The candidates result either by manual
selection of the unit in the candidate list (candidate mode) or by evaluation of configured
conditions (constraints mode).
Adjusting the recipe parameters
If an adjustment has been selected at a recipe parameter then set values can be optimally
entered when creating the recipe by dynamically calculated limit values in the displayed tooltip.
These limits calculated dynamically by the system are based on the candidate list and the
assignment strategy of the respective RUP (hierarchical recipe) or of the respective RPH (flat
recipe). If the set nominal value is within the recipe limits calculated by the system then no
parameter limits are violated when releasing the control recipe (batch release). However, this
presupposes that the mix is within the set recipe limits! If the standard mix is outside of the
recipe limits then a limit violation can not be excluded even if the set value is within the tooltip
limits.
With linear adjustment selected, the parameter limits are adjusted in the recipe editor according
to the following formula and then displayed in the tooltip:
● Adjusted parameter lower limit = ( standard mix / recipe lower limit) * Parameter lower limit
● Adjusted parameter upper limit = ( standard mix / recipe upper limit ) * Parameter upper
limit
Visualization / Tooltip highlighted in green
When adjusted nominal values are used, a check is made on the release of a control recipe
(batch release) whether the adjusted nominal values are within the limits defined by the
engineering system. Candidates that are no longer permitted are thereby removed from the
candidate list. It may also occur that no valid candidate exists any longer for this control recipe.
However, to ensure that such problems are not noticed for the first time at a later time, i.e. as
plausibility errors (limit value violations) on release of the batch, the creator of the recipe is
already supported by the system when working within the recipe editor and possible conflicts
are shown for prepared amounts within the set recipe limits.
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SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA