CntGetCountDirection

Function

Retrieves the count direction (Up count/Down count). Supports multi-processing.

Format

Ret = CntGetCountDirection ( Id , ChNo , Dir )

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#: short ] [ Python: ctypes.c_short ]
Specify the channel number for retrieving.

Dir [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the address of the variable that stores the retrieved count direction. Count direction is returned in the following Definition Value.

Definition	Value	Description
CNT_DIR_DOWN	0	Down count
CNT_DIR_UP	1	Up count

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.

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

Initial Value

Up count

Remarks

Retrieves the count direction of specified channel.

Example

Retrieves the count direction of channel 0.

VB.NET	Dim Ret As Integer Dim Dir As Short Ret = CntGetCountDirection ( Id , 0 , Dir )
C, C++	long Ret; short Dir; Ret = CntGetCountDirection ( Id , 0 , &Dir );
C#	int Ret; short Dir; Ret = cnt.GetCountDirection ( Id , 0 , out Dir );
Python	Ret = ctypes.c_long() Dir = ctypes.c_short() Ret.value = ccnt.CntGetCountDirection ( Id , 0 , ctypes.byref(Dir) )