Overview - Siemens SIMATIC S7-200 System Manual

S7-200 Programmable Controller System Manual

Overview

Support for recipes has been incorporated into STEP 7--Micro/WIN and the S7-200 PLC.
STEP 7--Micro/Win provides the Recipe Wizard to help you organize recipes and recipe
definitions.
All recipes are stored in the memory cartridge. Therefore, to use the recipe feature, an optional
64kB or 256kB memory cartridge must be installed in the PLC. See Appendix A for more
Recipe
information about the memory cartridges.
All recipes are stored in the memory cartridge. However, a single recipe is read into PLC memory
when the user program is processing this individual recipe. For example, if you are making
cookies, there may be recipes for chocolate chip, sugar, and oatmeal cookies. Only one type of
cookie can be made at a time, so the proper recipe must be selected and read into PLC memory.
Figure 13-1 illustrates a process for making multiple types of cookies using recipes. The recipe for
each type of cookie is stored in the memory cartridge. Using a TD 200C text display, the operator
selects the type of cookie to be made, and the user program loads that recipe into memory.
Memory Cartridge
S7-200 CPU
TD 200C
Figure 13-1 Example of Recipe Application
366
Recipe Definition: Donuts
Recipe Definition: Cookies
Oatmeal
Butter
Sugar
White sugar
.
Chocolate Chip
.
Butter 8 oz.
.
White sugar 6 oz.
Cook Time
.
.
.
Cook Time 9 minutes
Get Recipe
Chocolate_Chip
8, 6, ... 9
Cookies buffer in V Memory
Request Recipe