CntReadCount

Function

Reads the count value of specified channel. Supports multi-processing.

Format

Ret = CntReadCount ( Id , ChNo , ChNum , CntDat )

Parameters

Id [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the device ID retrieved from CntInit.

ChNo [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the base address of array to store the channel number of you want to get count.

ChNum [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the number of channels in array ChNo.

CntDat [ VB.NET: Integer ] [ C, C++: unsigned long * ] [ C#: out uint ] [ Python: ctypes.POINTER(ctypes.c_ulong) ]
Specify the base address of array to store the count value.

Return Value

Ret [ VB.NET: Integer ] [ C, C++: long ] [ C#: int ] [ Python: ctypes.c_long ]

Definition	Value	Description
CNT_ERR_SUCCESS	0	Normality completion
CNT_ERR_SYS_RECOVERED_FROM_STANDBY	7	Execute the function CntResetDevice to return from the standby mode.
CNT_ERR_DLL_INVALID_ID	10001	Invalid ID was specified.
CNT_ERR_DLL_CALL_DRIVER	10002	CNT driver can't be called (Failed in the device I/O control).
CNT_ERR_DLL_BUFF_ADDRESS	10101	Invalid data buffer address.
CNT_ERR_SYS_BOARD_EXECUTING	20002	Cannot use while by another device works.
CNT_ERR_SYS_CH_NO	20201	Channel number is out of range.
CNT_ERR_SYS_CH_NUM	20202	Number of channels is out of range.

The others: (See also: Details of Error Code)

Initial Value

None

Remarks

Reads the count value of specified channel. Passes the channel number in array. Corresponding count value is stored in the array in the order of storing the channel number in the array.

Example

Reads the count value of channel 0 and 1.

VB.NET	Dim Ret As Integer Dim ChNo(1) As Short ChNo(0) = 0 ChNo(1) = 1 Dim CntDat(1) As Integer Ret = CntReadCount ( Id , ChNo , 2 , CntDat )
C, C++	long Ret; short ChNo[2]; ChNo[0] = 0; ChNo[1] = 1; unsigned long CntDat[2]; Ret = CntReadCount ( Id , ChNo , 2 , CntDat );
C#	int Ret; short[] ChNo = new short[2]; ChNo[0] = 0; ChNo[1] = 1; uint[] CntDat = new uint[2]; Ret = cnt.ReadCount ( Id , out ChNo , 2 , out CntDat );
Python	Ret = ctypes.c_long() ChNoType = ctypes.c_short * 2 ChNo = ChNoType() ChNo[0] = 0 ChNo[1] = 1 CntDatType = ctypes.c_ulong * 2 CntDat = CntDatType() Ret.value = ccnt.CntReadCount ( Id , ChNo , 2 , CntDat )