AioGetAiChannel


Function

Retrieves whether the analog input channel used for conversion is used/unused.
This function is used by Z-series only.

Format

Ret = AioGetAiChannel ( Id , AiChannel, Enabled )

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# : out short ] [ Python : ctypes.c_short ]
Specifies the channel number to retrieve whether it is used/unused.

Enabled
[ VB.NET : Short ] [ C, C++ : short * ] [ C# : out short ] [ Python : ctypes.POINTER(ctypes.c_short) ]
The address of the variable that stores whether the channel is used/unused.

0

Unused channel

1

Used channel

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.

11030

Pointer to AiChannel is NULL
Specify the address of variable to parameter.

20001

This function can't be used by this device

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.

Initial value

All devices, channel 0 is used,
and channel 1, channel 2, channel 3 are unused.

Remarks

This function cannot be used on devices without the analog input function.
This function can be executed if the device is working.
This function is used by Z-series only.

Example

Retrieves whether the set channel is used/unused.

VB.NET

Dim Ret As Integer
Dim AiChannel As Short
Dim Enabled As Short
Ret = AioGetAiChannel ( Id , AiChannel, Enabled )
 

C, C++

long Ret;
short AiChannel;
short Enabled;
Ret = AioGetAiChannel ( Id , AiChannel, &Enabled );
 

C#

int Ret;
short AiChannel;
short Enabled;
Ret = aio.GetAiChannel ( Id ,AiChannel, out Enabled );
 

Python

Ret = ctypes.c_long()
AiChannel = ctypes.c_short()
Enabled = ctypes.c_short()
Ret.value = caio.AioGetAiChannel ( Id , AiChannel, ctypes.byref(Enabled) )
 

See also

AioSetAiChannel ,AioSetAiChannels AioGetAiMaxChannels