Function
Retrieves the number of overwrite if the
user buffer is used in "Overwrite the memory".
This function can only be used when the transfer mode of the conversion
data that is set by AioSetAiTransferMode is User buffer mode.
It cannot be used when the transfer mode of the conversion data is Device
buffer mode.
Format
Ret = AioGetAiTransferLap ( ID , Lap )
Parameters
Id
[ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the Device ID retrieved from AioInit function.
Lap
[ C, C++ : long * ] [ Python : ctypes.POINTER(ctypes.c_long) ]
Specifies the address of the variable that stores the number of lap.
Return value
Ret [ C, C++ : long ] [ 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 |
12160 |
Pointer
to Lap is NULL |
20001 |
This function can't be used by this device |
20003 |
Can
not use because another process is using the device |
Initial value
In all devices, Lap = 0
Remarks
Lap is automatically reset to 0 when the conversion is started by AioStartAi.
This function can be executed if the device
is working.
This function cannot be used on devices without the analog input function.
In the case of Z-series devices such as AI-1204Z-PE,
data is transferred to the PC side every 128-512 samplings for optimization.
Therefore, there is such a possibility that the count doesn't work when
the clocks input, but the sampling is performed.
When the transfer is completed, the rest of the data will also be transferred.
Example
Retrieves the number of overwrite.
C, C++ |
long Ret; |
Python |
Ret = ctypes.c_long() |