MXIO_ReadCoils_Ex
This function reads the fix modbus address on/off status for a contiguous group of coils on the same I/O device.
C/C++
int MXIO_ReadCoils_Ex( int hConnection,
BYTE bytCoilType,
WORD wStartCoil,
WORD wCount,
BYTE bytCoils[ ]);
Visual Basic
Declare Function MXIO_ReadCoils_Ex Lib "MXIO.dll" (ByVal hConnection As Long, ByVal bytCoilType As Byte, ByVal iStartCoil As Integer, ByVal iCount As Integer, bytCoils As Byte) As Long
Arguments:
hConnection |
Handle for the I/O device connection. |
bytCoilType |
Coil type to be read. |
wStartCoil |
Specifies the starting coil address to be read. The address is beginning at 0. |
wCount |
The number of coils to be read. |
bytCoils |
An array that stores the status of coils; each byte holds eight coil values. Bit 0 of 1st byte represents 1st coil status. |
Return Value:
Succeed |
MXIO_OK |
Fail |
Refer to Return Codes. |