Siemens SIMATIC S7-1200 - Page 508

Extended instructions
9.9 Recipes and Data logs
S7-1200 Programmable controller
508 System Manual, V4.2, 09/2016, A5E02486680-AK
Network 5
READ_DBL copies the start values from one recipe "Recipe_DB". Products[1] (in
CPU load memory) to the Active_Recipe DB current values (in CPU work memory). After
READ_DBL execution, your program logic can access the recipe component values by
addressing locations in the Active_Recipe DB. For example, the symbolic addresses (
"Active_Recipe".productname) and ("Active_Recipe.water) provide your program logic with
the current recipe name and quantity of water.
Network 6
During run time, An HMI device could modify a component value stored in the
Active_Recipe DB. Improved recipe data can be stored by executing WRIT_DBL. In the
example, all Recipe_DB start values for the single recipe "Recipe_DB". Products[1] are
overwritten by the current values from the "Active_Recipe" DB.