Function
Retrieves the level when the level comparison is stopped. Level settings are stored in Voltage or Current.
Format
Ret = AioGetAiStopLevelEx ( Id , AiChannel , AiStopLevel , AiDirection )
Parameters
Id
[ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the Device ID retrieved from AioInit function.
AiChannel
[ C, C++ : short ] [ Python : ctypes.c_short ]
Reserved. it should set 0(Zero).
AiStopLevel
[ C, C++ : float * ] [ Python : ctypes.POINTER(ctypes.c_float) ]
Specifies the address of the variable that stores the level comparison
data. The data are stored in Voltage or Current.
AiDirection
[ C, C++ : 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 |
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 |
11950 |
The value of AiChannel is outside the designated range of the function |
11951 |
Pointer
to AiStopLevel is NULL |
11952 |
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 |
21950 |
The value of AiChannel 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
Retrieves the level and the direction of the comparison stop in channel 0.
C, C++ |
long
Ret; |
Python |
Ret
= ctypes.c_long() |
See also