Function
Sets the level when the conversion start
condition is level comparison.
This settings is necessary when the conversion start condition that is
set by AioSetAiStartTrigger function is the level comparison.
This function doesn't need to be executed when the conversion start condition
is not level comparison.
It can be set only 1ch for each device. The latest setting is available when you set it several times.
Format
Ret = AioSetAiStartLevel ( Id , AiChannel , AiStartLevel , 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.
AiStartLevel
[ C, C++ : long ] [ Python : ctypes.c_long ]
Sets the data that performs the level comparison from the following range.
The available value differs by the device.
Resolution of device is 12 bit |
0 to 4095 |
Resolution of device is 16 bit |
0 to 65535 |
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 |
11180 |
The
value of AiChannel is outside the designated range of the function |
11181 |
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 |
21180 |
The value of AiChannel is outside the designated range of the device being used |
21181 |
Data to establish in the 12 bits device are within the range of 0 to 4095 |
21182 |
Data to establish in the 16 bits device are within the range of 0 to 65535 |
21184 |
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 = 800H |
Resolution of device is 16 bit |
AiStartLevel = 8000H |
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
Sets level comparison start
for channel 0.
Level data is 800H, Level direction is Both edges.
C, C++ |
long
Ret; |
Python |
Ret
= ctypes.c_long() |
See also