Function
Sets the level when the conversion stop condition
is Level comparison. Level settings are stored in Voltage or Current.
This settings is necessary when the conversion stop condition that is set
by AioSetAiStopTrigger function is the level comparison.
It isn't necessary to be set except for the conversion stop condition is
the level comparison.
It can be set only 1ch for each device. The latest setting is available when you set it several times.
Format
Ret = AioSetAiStopLevelEx ( 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 ]
Specifies the channel that performs the level comparison.
AiStopLevel
[ C, C++ : float ] [ Python : ctypes.c_float ]
Sets the data that performs the level comparison in voltage or current.
AiDirection
[ C, C++ : short ] [ Python : ctypes.c_short ]
Sets the direction of the level comparison from the following range.
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 |
11940 |
The
value of AiChannel is outside the designated range of the function |
11941 |
The
value of AiDirection is outside the designated range of the function |
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 |
21940 |
The value of AiChannel is outside the designated range of the device being used |
21941 |
The value of AiStopLevel is outside the designated range of the device being used |
21943 |
The value of AiDirection 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
Stops channel 0 by the
level comparison.
Level data is 5.0V, Level direction is both edges.
C, C++ |
long
Ret; |
Python |
Ret
= ctypes.c_long() |
See also