Siemens simatic hmi op7 Equipment Manual page 76

Components of a
recipe
Data records on
the OP
Identification of
recipes and data
records
8-2
A recipe consists of a series of recipe entries. Each entry contains a maxi-
mum of one input field (i.e., tag). Depending on the configuration,
either direct or symbolic value input can be used in an input field.
The recipe called Mixture could be set up from the following entries.
Name:
Orange:
Water:
Sugar:
Flavoring:
Input fields (tags)
In contrast to screens, several entries are displayed on the OP simultaneously
for recipes.
On the OP, the tags allocated to the input fields are assigned with values and
stored on the OP. Together, these values form one data record of the recipe.
Several data records can be created for one recipe. This permits a fruit juice
plant to operate with different types of drinks, for example, by using a diffe-
rent data record for each type of drink.
Name: Drink
Orange: 90 l
Water: 10 l
Sugar: 1.5 kg
Flavoring: 200 g
Entries of the recipe Data record 1
"Mixture"
All data records are stored in the OP. Only the data record which is active at
the moment is stored in the PLC. This saves memory space in the PLC.
A recipe is identified by a recipe number and a recipe title specified during
configuration. A data record is identified by a data record number and a data
record name assigned in the OP.
The clear and unmistakable identification factor for a data record is the data
record number and not the data record name.
This means that, although several data records with the same name may
exist, several data records with the same number cannot exist. If no name is
assigned to a data record, it is assigned the name "data record".
l
l
kg
g
Nectar
70 l
30 l
1.5 kg
400 g
Data record 2
Equipment Manual OP7, OP17
Juice
95 l
5 l
0.5 kg
100 g
Data record 3
Release 04/99