W5K_DI_Reads_Ex
This function code is used to read the status of a group of contiguous D/I channels.
C/C++
int W5K_DI_Reads_Ex( int hConnection,
BYTE bytStartChannel,
BYTE bytCount,
DWORD * dwValue,
BYTE BytSlot);
Visual Basic
Declare Function W5K_DI_Reads_Ex Lib "MXIO.dll" (ByVal hConnection As Long,
ByVal bytStartChannel As Byte, ByVal bytCount As Byte, nValue As Long, ByVal bytSlot As Byte) As Long
Arguments:
hConnection |
The handle for an I/O device's connection. |
bytStartChannel |
Specifies the starting channel. |
wCount |
The number of channels to be read. |
dwValue |
A pointer that stores the contiguous D/I channel's values; each bit holds one channel value. A bit value of 0 represents the digital input status of the start channel. A bit value of 1 represents the second digital input channel's status. The values of the unused bits are random. |
bytSlot |
Slot number of the I/O module. The Slot number ranges from 0 to 3. (0 for W5000 module) |
Return Value:
Succeed |
MXIO_OK |
Fail |
Refer to Return Codes. |