Справочник Пользователя для Siemens 090-010
Industry Sector, IA&DT
SCE Training Curriculum
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TIA Portal Module 090-010, Edition 03/2013
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SCE_EN_090-010_R1209_ WinCC Advanced with Runtime and TP700 Comfort Panel
3.2
Plant description
A color mixing station is controlled using a SIMATIC S7-300 in automatic or in manual mode. In
"Automatic" mode, the three tanks are filled using a two-point control mechanism.
At minimum fill level, the supply valve of the corresponding tank is opened automatically and only closed
once the maximum fill level is reached.
The preset program is run when the Start button is pressed.
First, the drain valves are opened and the corresponding default quantities are filled into the reservoir
from the separate tanks.
After the drain valves are closed, the mixer motor is started.
At the end of the mixing process and after a short rest period, the drain valve of the reservoir opens and
the finished color mixture is discharged.
The start function is enabled as soon as the reservoir is empty.
The light in the start button is lit and a new color mixing process can be started.
In "Manual" mode, the automatic draining process is terminated; all valves and the mixer motor can then
be operated manually.
The lights in the buttons for manual operation are lit.
Note
The default quantities and time periods are determined by the program.
If another color mixing process is to be started, the default quantities and time periods must be changed
in the program or a new program must be loaded to the controller.
Auto-Man
START
T1 supply
T1 drain
T2 supply
T2 drain T3 supply
T3 drain
Reservoir
Motor