User`s manual

AW00104701000 I/O Control
Basler scout light GigE 81
8.3 Checking the State of the I/O Lines
8.3.1 Checking the State of the Output Line
You can determine the current state of the output line. To check the state of the line:
 Use the Line Selector parameter to select the output line.
 Read the value of the Line Status parameter to determine the current state of the selected line.
A value of true means the line’s state is currently high and a value of false means the line’s
state is currently low.
You can set the Line Selector and read the Line Status parameter value from within your application
software by using the pylon API. The following code snippet illustrates using the API to set the
selector and read the parameter value:
// Select output line 1 and read the state
Camera.LineSelector.SetValue( LineSelector_Out1 );
bool outputLine1State = Camera.LineStatus.GetValue( );
For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guide
and API Reference.
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon Viewer, see Section 3.1 on page 25.
8.3.2 Checking the State of Both Lines
You can determine the current state of the input and output lines with a single operation. To check
the state of both lines:
 Read the value of the Line Status All parameter.
You can read the Line Status All parameter value from within your application software by using the
pylon API. The following code snippet illustrates using the API to read the parameter value:
int64_t lineState = Camera.LineStatusAll.GetValue( );
The Line Status All parameter is a 32 bit value. As shown in Figure 25, certain bits in the value are
associated with each line, and the bits will indicate the state of the lines. If a bit is 0, it indicates that
the state of the associated line is currently low. If a bit is 1, it indicates that the state of the associated
line is currently high.
Indicates output line 1 state
Indicates input line 1 state
Fig. 25: Line Status All Parameter Bits