The ProSim-II Silo Simulation
From the Simulations Menu at the top of the screen, Select the Silo Simulation
Exercise #1 -- Continuous Operation
Completely design and de-bug a
ladder control circuit which will automatically position and fill
the boxes which are continuously sequenced along the conveyor.
Ensure that the following details are also met:
- The sequence can be stopped
and re-started at any time using the panel mounted Stop and Start
switches.
- The RUN light will remain energized as long as the system is
operating automatically.
- The RUN light, Conveyor Motor and Solenoid will de-energize
whenever the system is halted via the STOP switch.
- The FILL light will be energized while the box is filling.
- The FULL light will energize when the box is full and will
remain that way until the box has moved clear of the prox-sensor.
Exercise #2 -- Container Filling with Manual Restart
Alter or re-write your program so
that it incorporates the following changes:
- Stop the conveyor when the right edge of the box
is first sensed by the prox-sensor.
- With the box in position and the conveyor stopped, open the
solenoid valve and allow the box to fill. Filling should stop when
the Level sensor goes true.
- The FILL light will be energized while the box is filling.
- The FULL light will energize when the box is full and will
remain that way until the box has moved clear of the prox-sensor.
- Once the box is full, momentarily pressing the Start Switch will
move the box off the conveyor and bring a new box into position.
Forcing the operator to hold the Start button down until the box
clears the prox-sensor is not acceptable.
Exercise #3 -- Selectable Mode of Operation
Alter or re-write your program so
that the panel mounted Selector switch can be utilized to select
one of 3 different modes of operation. The 3 modes shall operate
as follows:
- When the selector switch is in position "A", the system shall
operate in the "Continuous" mode of operation. This is the mode of
operation which was used in Exercise #1.
- When the selector switch is in position "B", the system shall
operate in the "Manual Restart" mode of operation. This is the mode of
operation which was used in Exercise #2.
- When the selector switch is in position "C", the system shall
operate in the "Fill Bypass" mode of operation. In this mode, the
boxes will simply move down the conveyor continuously and bypass the
fill operation. As in the other modes, the Start and Stop pushbuttons
will control the conveyor motion and the Run Lamp will operate as
expected.
......