E42_DO_Reads
This function code is used to read the output statuses of contiguous D/O channels.
C/C++
int E42_DO_Reads( int hConnection,
BYTE bytSlot,
BYTE bytStartChannel,
BYTE bytCount,
DWORD * dwValue);
Visual Basic
Declare Function E42_DO_Reads Lib "MXIO.dll" (ByVal hConnection As Long, ByVal bytSlot As Byte, ByVal bytStartChannel As Byte, ByVal bytCount As Byte, nValue As Long) 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 16. But this parameter is inactive in ioLogik 2000. |
bytStartChannel |
Specifies the starting channel. |
bytCount |
The number of channels to be read. |
dwValue |
A pointer that stores the contiguous D/O channel's status; each bit holds one channel value. A bit value of 0 represents the digital output status of the start channel. A bit value of 1 represents the status of the second digital output channel. The values of the unused bits are random. |
Return Value:
Succeed |
MXIO_OK |
Fail |
Refer to Return Codes. |