8-1
OP27,
OP37 Equipment Manual
Release 05/99
Recipes
Recipes
consist of combinations of tags for a specific application. The purpose
of recipes is to transfer several items of data collectively to the PLC. On doing
so, the OP and the PLC are synchronized.
The data structure is defined with the data record in the configuration. Data is
assigned to the structure on the OP
. This data structure (recipe) can be used
more than once and dif
ferent data can be assigned to it. Data which has been
assigned to a recipe is referred to as “data records”. Data records are stored on
the OP
. This saves memory space on the PLC.
The same bottling machine of a fruit juice filling system is to be used to pro
-
duce orange nectar
, an orange drink and orange juice. The mixing ratios are
dif
ferent for each drink, though the ingredients are always the same. The pro
-
duction details are configured in this example as the “Mixture” recipe.
Tank
1
T
ank 2
T
ank 3
T
o bottling machine
MIXER
M
PLC – for example, SIMA
TIC S7
Mixing Unit
Operator Panel, e.g. OP37
Figure 8-1 Example: Fruit juice system
Purpose
Data
records
Example of a
recipe
8
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