Einführung

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.

FIFO-Buffer
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.

FIFO-Buffer   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).

FIFO-Buffer einfügen
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.

Parameteränderungen übernehmen   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.

FIFO-Buffer   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

Back Next

Startseite   Tutorials   Einführung