Retrieves the level when the level comparison is started.
Ret = AioGetAiStartLevel ( Id , AiChannel , AiStartLevel , AiDirection )
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 |
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 |
10002 |
AIO
driver can't be called |
11190 |
The
value of AiChannel is outside the designated range of the function |
11191 |
Pointer
to AiStartLevel is NULL |
11192 |
Pointer
to AiDirection is NULL |
20001 |
This function can't be used by this device |
20002 |
Can
not use while by another device works |
20003 |
Can
not use because another process is using the device |
21180 |
The value of AiChannel is outside the designated range of the device being used |
In all devices, AiChannel = 0, AiDirection = 0
Resolution of device is 12 bit |
AiStartLevel = 800H |
Resolution of device is 16 bit |
AiStartLevel = 8000H |
This function cannot be used on devices without
the analog input function.
If the device is in operation, the function cannot be performed.
Retrieves the level and the direction of the comparison start for channel 0.
VB.NET |
Dim
Ret As Integer |
C, C++ |
long
Ret; |
C# |
int
Ret; |
Python |
Ret
= ctypes.c_long() |