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FIFO Buffer → Buffer Parameter |
A FIFO buffer has a couple of parameters. For each FIFO buffer you can specify the buffer name, the buffer
size, the data transfer direction, the row height and the width.
The name of the buffer is displayed at the upper left corner of the buffer symbol as shown in
Figure 9 (buffer name X).
The buffer size is the storage capacity of the FIFO buffer. That means it is the maximal number
of data values the buffer could hold. It is repesented by the number of rows in the corresponding
buffer symbol.
The data transfer direction defines the direction of the data value
shifting (topdown or bottomup) within the buffer symobl.
The values for the row height, the width and the buffer size determine
the measures of the buffer symbol in the network editor.
Figure 9
The FIFO buffer as shown in Figure 9 has the name X and a size of 5. The selected data transfer
direction is topdown. The values for the row height and the width are 15 pixel and 80 pixel.
These parameters must be specified separately for each FIFO buffer of the process network.
By selecting the toolbar button Show/Hide Parameters in the network editor or the
menu item Process/Buffer → Show Parameters
you can open the buffer parameter frame (see Figure 10).
Figure 10
The parameter frame shows the parameter values for the currently selected FIFO buffer.
By editing the text input fields Name:, Buffer Size:,
Row Height: und Width: you can enter or change the values for the corresponding
parameters. By using the toggle button group Direction: you can choose the
data transfer direction of the buffer. By selecting the toggle button Bottomup
the data values will be shifted from the bottom to the top of the buffer. Therefore the input
port of the buffer is placed at the bottom and the output port is placed at the top of the buffer symbol.
By selecting the toggle button Topdown
the data values will be shifted from the top to the bottom and therfore the input
port of is placed at the top and the output port is placed at the bottom of the buffer symbol.
By selecting the button
Ok you can confirm the current settings and the FIFO buffer
will be updated in the network editor. The parameter frame will be closed.
For closing the parameter frame without an update of the buffer you can use the
the button Cancel of the parameter frame.
In the next chapter you can find details about the specification of processes. You will see how to add, connect and remove processes in the network editor.
Introduction > FIFO Buffer
> Buffer Parameter
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