Checking The State Of The I/O Lines; Checking The State Of The Output Line; Checking The State Of All Lines - Basler ace acA640-90gm User Manual

I/O Control
6.3

Checking the State of the I/O Lines

6.3.1

Checking the State of the Output Line

You can determine the current state of the output line. To check the state of the output line:
Use the Line Selector parameter to select output line 1.
Read the value of the Line Status parameter to determine the current state of the 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 Basler 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( );
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon API and the pylon Viewer, see Section 3.1.1 on
6.3.2

Checking the State of All Lines

You can determine the current state of the input line and the output line 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
Basler 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 33, 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.
Fig. 33: Line Status All Parameter Bits
62
Indicates output line 1 state
page 28.
Indicates input line 1 state
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