DO_Read

 

This function code is used to read the output status of a specific D/O channel.

 

C/C++

int DO_Read( int hConnection,

BYTE bytSlot,

BYTE bytChannel,

BYTE * bytValue);

 

Visual Basic

Declare Function DO_Read Lib "MXIO.dll" (ByVal hConnection As Long, ByVal bytSlot As Byte, ByVal bytChannel As Byte, bytValue As Byte) As Long

 

Arguments:

hConnection

The handle for an I/O device connection.

bytSlot

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

bytChannel

The specific channel to be read.

bytValue

A pointer that stores the specific channel output value to be read.

 

Return Value:

Succeed

MXIO_OK

Fail

Refer to Return Codes.