AioGetAoMaxChannels

Function

Retrieves the maximum number of channels for the analog output. This function supports multi-process.

Format

Ret = AioGetAoMaxChannels ( Id , AoMaxChannels )

Parameters

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

AoMaxChannels [ VB.NET : Short ] [ C, C++ : short * ] [ C# : out short ] [ Python : ctypes.POINTER(ctypes.c_short) ]
Specifies the address of the variable that stores the maximum number of channels.

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.
13080	Pointer to AoMaxChannels is NULL Specify the address of variable to parameter.
20002	Can not use while by another device works When another process is using the device, all functions except for those that support multi-process can not be performed.

Initial value

The maximum number of channels differs by the device that you use.

Remarks

If the device is in operation, the function cannot be performed.

Specifications based on devices

AIO-163202G-PE AIO-163202UG-PE AIO-123202G-PE AIO-123202UG-PE AIO-163202F-PE ADA16-32/2(PCI)F	AoMaxChannels = 2
AIO-160802L-LPE ADA16-8/2(LPCI)L ADAI16-8/2(LPCI)L AIO-160802LI-PE	AoMaxChannels = 2
DA16-16(LPCI)L AO-1616L-LPE	AoMaxChannels = 16
DA16-8(LPCI)L AO-1608L-LPE	AoMaxChannels = 8
AO-1604L-LPE DA16-4(LPCI)L DAI16-4(LPCI)L AO-1604LI-PE AO-1604LX-USB	AoMaxChannels = 4
DA12-16(PCI) DA12-8(PCI) DA12-4(PCI)	AoMaxChannels = 16 AoMaxChannels = 8 AoMaxChannels = 4
AO-1604CI3-PCI	AoMaxChannels = 4
AIO-160802AY-USB AIO-160802GY-USB	AoMaxChannels = 2
AIO-163202FX-USB	AoMaxChannels = 2
AIO-121602LN-USB AIO-120802LN-USB	AoMaxChannels = 2
AO-1604VIN-USB AO-1604AIN-USB AO-1604VIN-ETH AO-1604AIN-ETH	AoMaxChannels = 4
AD12-16(PCI)EV AD12-16U(PCI)EV AD16-16(PCI)EV AD16-16U(PCI)EV AIO-121601E3-PE AIO-121601UE3-PE AIO-161601E3-PE AIO-161601UE3-PE	AoMaxChannels = 1
CPS-AO-1604LI CPS-AO-1604VLI	AoMaxChannels = 4
CPSN-AO-1602LC	AoMaxChannels = 2
DEMO DEVICE	AoMaxChannels = 256

Example

Retrieves the maximum number of channels for the analog output.

VB.NET	Dim Ret As Integer Dim AoMaxChannels As Short Ret = AioGetAoMaxChannels ( Id , AoMaxChannels )
C, C++	long Ret; short AoMaxChannels; Ret = AioGetAoMaxChannels ( Id , &AoMaxChannels );
C#	int Ret; short AoMaxChannels; Ret = aio.GetAoMaxChannels ( Id , out AoMaxChannels );
Python	Ret = ctypes.c_long() AoMaxChannels = ctypes.c_short() Ret.value = caio.AioGetAoMaxChannels ( Id , ctypes.byref(AoMaxChannels) )