AioSetAiStartLevelEx

Function

Sets the level when the Level comparison is started. The level is stored in Voltage or Current.
This settings is necessary when the conversion start condition that is set by AioSetAiStartTrigger function is the level comparison.
It isn't necessary to be set except for the conversion start condition is the level comparison.

Only one level comparison setting can be set for one device. If specified multiple times, only the last data is valid.

Format

Ret = AioSetAiStartLevelEx ( 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 ]
Specifies the channel that performs the level comparison.

AiStartLevel [ VB.NET : Single ] [ C, C++ : float ] [ C# : float ] [ Python : ctypes.c_float ]
Sets the data that performs the level comparison in Voltage or Current.

AiDirection [ VB.NET : Short ] [ C, C++ : short ] [ C# : short ] [ Python : ctypes.c_short ]
Sets the direction of the level comparison from the following range.

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.
11920	The value of AiChannel is outside the designated range of the function Specify the channel setting in range: 0 <= AiChannel <= Max channel.
11921	The value of AiDirection is outside the designated range of the function Set 0(both sides), 1(rising) or 2(falling) to AiDirection.
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.
21920	The value of AiChannel is outside the designated range of the device being used
21921	The value of AiStartLevel is outside the designated range of the device being used
21923	The value of AiDirection 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 = Voltage or Current value equals to 800H in binary value
Resolution of device is 16 bit	AiStartLevel = Voltage or Current value equals to 8000H in binary value

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

Starts channel 0 by the level comparison.
Level data is 5.0V, Level direction is both edges.

VB.NET	Dim Ret As Integer Ret = AioSetAiStartLevelEx ( Id , 0 , 5.0 , 0 )
C, C++	long Ret; Ret = AioSetAiStartLevelEx ( Id , 0 , 5.0 , 0 );
C#	int Ret; Ret = aio.SetAiStartLevelEx ( Id , 0 , 5.0F , 0 );
Python	Ret = ctypes.c_long() Ret.value = caio.AioSetAiStartLevelEx ( Id , 0 , 5.0 , 0 )