AioStartCnt

Function

Starts the counter action according to the set condition.

Format

Ret = AioStartCnt ( Id , CntChannel)

Parameters

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

CntChannel [ VB.NET : Short ] [ C, C++ : short ] [ C# : short ] [ Python : ctypes.c_short ]
Sets the channel of counter.

Return value

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

Return values	Content
0	Normality completion
7	Execute AioResetDevice function because the device has recovered from standby mode
10001	Invalid Id was specified Use the Id retrieved from AioInit to specify the Id in this function.
10002	AIO driver can't be called At first, perform AioInit function.
15140	The value of CntChannel is outside the designated range of the function
20001	This function can't be used by this device
20002	Can not use while by another device works To use this function, counter operation must be stopped.
20003	Can not use because another process is using the device When another process is using the device, all functions except for those that support multi-process can not be performed.
25140	The value of CntChannel is outside the designated range of the device being used

Remarks

The counter operation starts according to the set condition as soon as this function is performed.

After the counter operation was started, its status becomes ON when the comparison count match occurs.
The status is set back to OFF by performing the function AioResetCntStatus.

If the status of comparison count match is in ON, the overrun status becomes ON when the comparison count match occurs again.
The status is set back to OFF by performing the function AioResetCntStatus.
Even if the overrun status changes to ON, the counter operation isn't stopped.

This function cannot be used on devices without counter functionality.
If the device is in operation, the function cannot be performed.

Example

Starts the counter action for channel 0.

VB.NET	Dim Ret As Integer Ret = AioStartCnt ( Id , 0 )
C, C++	long Ret; Ret = AioStartCnt ( Id , 0 );
C#	int Ret; Ret = aio.StartCnt ( Id , 0 );
Python	Ret = ctypes.c_long() Ret.value = caio.AioStartCnt ( Id , 0 )