Description recipe

Important:
To be sure that a recipe value has been taken over into the Excel-worksheet, you have to leave the changed
field button with the “Enter”- button or you have to press the acknowledge button.
To be sure that your recipe has properly taken over all your important changes, just change the Step once
to come back to the original one.
Do not change the name or the place of the data file recipe.xls
5.2.1 Change of Step
The most important parameter is the one where you define how your step is terminated. In this plant
you have the possibilities
"time of step reached"
"temperature of reactor reached"
"pressure of reactor reached" (only possible in overpressure mode)
"dosing mass of liquid feed reached"
"dosing mass of solid feed reached"
"torque of stirrer reactor reached"
"change of step manually"
"purge system w. pressure successful"
"pressure test successful"
5.2.2 Process parameter input
The rest are the process values and set points you can send to the control system during a running
Step. This is more or less self explaining for somebody who knows the plant.
For some set points you have the possibility to enter a value for the Beginning and one for the End of
a Step. A ramp will be calculated between this 2 values. This is only possible for time terminated
steps. If you want a constant value, you have to enter the same value in both fields.
The window structure is dynamic and some values are only visible in a certain constellation. For
example if you are in a step where reaching a certain temperature will terminate the step, nobody
knows exactly when this point is reached. Therefore it does not make a sense to enter a ramp function
for the temperature set point. This is only useful in a time-terminated step. So in this case only one
input field for the temperature set point is given.
IMPORTANT:
If you select or , be sure that your values in the
inertisation sub screen in WinCC are as you want them. They are used and can not be
influenced by the recipe.
DANGER:
If you select be aware of the fact that hydrogen is used to build up
overpressure in any case, except there is Helium connected to the hydrogen input.
5.2.3 Choosing a recipe or create a new one
Recipes can be chosen in the Field right top of the screen left of the button. Please note that
after choosing the recipe you have to press the enter button to show its parameters in the Register.
AP-Miniplant - Operation Manual Mini Batch Plant Page 44