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Program terminology
A computer controlled system needs a sequence of commands, this is called a program. The program
should give commands in the correct order to tell the computer exactly what to do and when to do it.
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The Control program is the entire set of commands. There is only one control program. It can be
made up of one or more flowcharts.
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A Flowchart - each flowchart begins with a Start. There maybe multiple flowcharts in a control
program.
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A Procedure – a procedure is a subset of a flowchart. It will not run on its own, it must be called up
by a flowchart. There maybe multiple procedures in a flowchart.
Placing symbols and entering commands
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If the Selection icon isn’t already active, click to select.
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Click on the symbol you require in the symbol toolbar (it will highlight to show it has
been selected).
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Move the mouse over into the edit area (the selected symbol will be locked to the cursor), when the
symbol is in the correct location, click to place it.
Note: Usually flowcharts run from the top left of the screen downwards, and if required over to the right.
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Once the symbol has been placed in the edit area, the I/O panel will change to a selection panel
from which you choose the action required. Depending on the symbol placed, the selection panel
will offer different options.
For example:
With the set to Level 2, when you place an Output symbol, the selection panel will look like this
To switch on an output, click on the Switch Output button (1).
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