4.12. Draw Input Port
To input the control object of input port, the user can select the “Input Port”
command in the Draw Menu or click the icon .
After the “Input Port” is selected, the input port properties as shown in Fig. 4-42
will be displayed in the Properties Toolbar.
4-42
Figure 4-42 Input Port Parameters
I/O I/O Control Condition
Prompting Message
Enable
I/O Control Condition: When the marking comes to the current input port, the
system will read the input port and compare the read value with the I/O Control
Condition; if the two equal, the system will proceed to the following ports, and
otherwise it will read the port again.
Prompt Message: It is given by the system when it reads the port repeatedly
and waits for the matching between the port value and the I/O Control
Condition.
4.13. Draw Output Port
To draw the control object of output port, the user can select the "Output Port”
command in the Draw Menu or click the icon
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