CntNotifyCounterError

Function

Sets the notify of counter error (Abnormal input error, Filter error, Alarm error). Supports multi-processing.

Format

Ret =CntNotifyCounterError ( Id , hWnd )

Parameters

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

hWnd [ VB.NET: IntPtr ] [ C, C++: HWND ] [ C#: IntPtr ] [ Python: ctypes.wintypes.HANDLE ]
Specify the window handle that receives the notify of counter error.
The window handle can be retrieved by m_hWnd for VC.
Specify 0 when using callback without using window message.

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_CREATE_THREAD	10005	Failed in the creation of the thread (Failed in CreateThread).
CNT_ERR_DLL_HWND	10200	Window handle is invalid.
CNT_ERR_SYS_NOT_SUPPORTED	20001	This function can't be used by this device.

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

Remarks

Execute this function before the counter starts.

Interrupt is invalid if CntResetDevice is called.

The number of processes that can receive events varies depending on the device used.
For details, please refer to the list of the number of available processes.

The following message is posted to the specified window handle when interrupt occurs.

Definition	Value
CNTM_COUNTER_ERROR	1141H

The following information are contained in wParam and lParam that is the parameter of the message respectively.
* HIWORD and LOWORD show the high-word and low-word.

Definition	Description
LOWORD(wParam)	Device ID Retrieved from CntInit
HIWORD(wParam)	Channel Number
LOWORD(lParam)	Error kind

[Definition of error kind]

Definition	Value	Description
CNT_AI_ERROR	1	Abnormal input error
CNT_FLT_ERROR	2	Filter error
CNT_ALM_ERROR	3	Alarm error

Please refer to the sample program of each language for the describing details of message processing.

For Ethernet devices
  If communication with the device is lost, the process will be unregistered and events will no longer be notified.
  If you want to perform event notification again, please make the settings again using this function.

  You can check the registration status of the current process using the CntGetNetCommunicationInfo function.

Example

Sets the notify of counter error.

VB.NET	Dim Ret As Integer Ret = CntNotifyCounterError ( Id , Handle )
C, C++	long Ret; Ret = CntNotifyCounterError ( Id , m_hWnd );
C#	int Ret; Ret = cnt.NotifyCounterError ( Id , Handle );
Python	Ret = ctypes.c_long() handle = ctypes.windll.user32.FindWindowW(0, "Interrupt") Ret.value = ccnt.CntNotifyCounterError ( Id , handle )