Line Logic

The Line Logic camera feature allows you to determine the logic of an I/O line.

The logic of an I/O line can either be positive or negative.

Using the Feature

Determining the Line Logic

To determine the logic of an I/O line:

1. Set the LineSelectorparameter to the desired I/O line.
2. Get the value of the LineLogic parameter.
   This parameter is read-only.

Line Logic Overview

Positive Line Logic

If the line logic is positive, the relation between the electrical status of an I/O line and the LineStatus parameter is as follows:

Electrical Status	LineStatus Parameter Value
Voltage level high	True
Voltage level low	False

Negative Line Logic

If the line logic is negative, the relation between the electrical status of an I/O line and the LineStatus parameter is as follows:

Electrical Status	LineStatus Parameter Value
Voltage level high	False
Voltage level low	True

Sample Code

C++ (Native)

// Select a line
camera.LineSelector.SetValue(LineSelector_Line1);
// Get the logic of the line
LineLogicEnums e = camera.LineLogic.GetValue();

C++ (Generic)

INodeMap& nodemap = camera.GetNodeMap();
// Select a line
CEnumParameter(nodemap, "LineSelector").SetValue("Line1");
// Get the logic of the line
String_t e = CEnumParameter(nodemap, "LineLogic").GetValue();

C#

// Select a line
camera.Parameters[PLCamera.LineSelector].SetValue(PLCamera.LineSelector.Line1);
// Get the logic of the line
string e = camera.Parameters[PLCamera.LineLogic].GetValue();

C (Generic)

/* Macro to check for errors */
#define CHECK(errc) if (GENAPI_E_OK != errc) printErrorAndExit(errc)
GENAPIC_RESULT errRes = GENAPI_E_OK;  /* Return value of pylon methods */
size_t len = 0;
char e_str[64] = {0};
/* Select a line */
errRes = PylonDeviceFeatureFromString(hdev, "LineSelector", "Line1");
CHECK(errRes);
/* Get the logic of the line */
len = sizeof(e_str);
errRes = PylonDeviceFeatureToString(hdev, "LineLogic", e_str, &len);
CHECK(errRes);

You can also use the pylon Viewer to easily set the parameters.