AI_Read

 

This function code is used to read the analog input value for a specific channel.

 

C/C++

int AI_Read( int hConnection,

BYTE bytSlot,

BYTE bytChannel,

double * dValue);

 

Visual Basic

Declare Function AI_Read Lib "MXIO.dll" (ByVal hConnection As Long, ByVal bytSlot As Byte, ByVal bytChannel As Byte, dValue As Double) As Long

 

Arguments:

hConnection

The handle for an I/O device connection.

bytSlot

Slot number of the I/O module. The Slot number ranges from 1 to 32. But this parameter is inactive in ioLogik 2000.

bytChannel

The specific channel to be read.

dValue

A pointer that stores the specific channel's analog input value to be read. The unit is Vdc for the voltage module, and mA for the current module.

 

Return Value:

Succeed

MXIO_OK

Fail

Refer to Return Codes.