Exit to the Main Menu and select the Batch Mixing
simulation.
Using your knowledge of PLC instructions, design a program to
meet the following requirements:
The batch mixing process will run as a continuous operation
which may be stopped or started at any time using switches S1
and S2.
The tank is to be filled with a mixture obtained from the
separate fill lines using pumps P1 and P2. A counter will control
the quantity of product obtained from Line 1 (P1) while the
remainder will come from Line 2 (P2). The tank is to be filled
to the point where the Hi-Level sensor goes
true.
When filling is complete, the Full light will turn On. Heater
O:1/04 and Mixer O:1/00 will be started allowing the mixture to
begin heating. Thermostat I:1/04 is used to control the temperature
limit.
The mixer will continue to run for 4 seconds after the mixture
reaches the desired temperature. When the mixer stops, pump P3 will
be used to drain the product from the tank. The tank will be
drained to the point where the Lo-Level sensor trips.
Once emptied, the fill, mix, heat process will repeat.
A second counter will be used to track the number of batches
that have been mixed. The batch count will be controllable by
adjusting the counter's preset.
Separate counters will be used to track the quantity of product
that has been taken from the 2 individual fill lines.
Run-time timers will be used to keep track of The accumalated
Mixer, and Heater operation times.
Once you have the program designed
enter it into the PLC and confirm it's operation.
