AioGetAiStartLevel

Function

Retrieves the level when the level comparison is started.

Format

Ret = AioGetAiStartLevel ( Id , AiChannel , AiStartLevel , AiDirection )

Parameters

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

AiChannel [ VB.NET : Short ] [ C, C++ : short ] [ C# : short ] [ Python : ctypes.c_short ]
Fixed to 0. (Reserved)

AiStartLevel [ VB.NET : Integer ] [ C, C++ : long * ] [ C# : out int ] [ Python : ctypes.POINTER(ctypes.c_long) ]
Specifies the address of the variable that stores the data of the level comparison. The data are stored in binary value.

AiDirection [ VB.NET : Short ] [ C, C++ : short * ] [ C# : out short ] [ Python : ctypes.POINTER(ctypes.c_short) ]
Specifies the address of the variable that stores the direction of the level comparison.

0	Both edges
1	Rising edge
2	Falling edge

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.
11190	The value of AiChannel is outside the designated range of the function Specify the channel setting in range: 0 <= AiChannel <= Max channel.
11191	Pointer to AiStartLevel is NULL Specify the address of variable to parameter.
11192	Pointer to AiDirection is NULL Specify the address of variable to parameter.
20001	This function can't be used by this device
20002	Can not use while by another device works To use this function, analog input 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.
21180	The value of AiChannel is outside the designated range of the device being used

Initial value

In all devices, AiChannel = 0, AiDirection = 0

Resolution of device is 12 bit	AiStartLevel = 800H
Resolution of device is 16 bit	AiStartLevel = 8000H

Remarks

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

Example

Retrieves the level and the direction of the comparison start for channel 0.

VB.NET	Dim Ret As Integer Dim AiStartLevel As Integer Dim AiDirection As Short Ret = AioGetAiStartLevel ( Id , 0 , AiStartLevel , AiDirection )
C, C++	long Ret; long AiStartLevel; short AiDirection; Ret = AioGetAiStartLevel ( Id , 0 , &AiStartLevel , &AiDirection );
C#	int Ret; int AiStartLevel; short AiDirection; Ret = aio.GetAiStartLevel ( Id , 0 , out AiStartLevel , out AiDirection );
Python	Ret = ctypes.c_long() AiStartLevel = ctypes.c_long() AiDirection = ctypes.c_short() Ret.value = caio.AioGetAiStartLevel ( Id , 0 , ctypes.byref(AiStartLevel) , ctypes.byref(AiDirection) )