AioGetAiStopLevelEx

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 Use the Id retrieved from AioInit to specify the Id in this function.
10002	AIO driver can't be called At first, perform AioInit function.
11950	The value of AiChannel is outside the designated range of the function
11951	Pointer to AiStopLevel is NULL Specify the address of variable to parameter.
11952	Pointer to AiDirection is NULL Specify the address of variable to parameter.
20001	This function can't be used by this device
20002	Can not use while by another device works To use this function, analog input operation must be stopped.
20003	Can not use because another process is using the device When another process is using the device, all functions except for those that support multi-process can not be performed.
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; float AiStopLevel; short AiDirection; Ret = AioGetAiStopLevelEx ( Id , 0 , &AiStopLevel , &AiDirection );
Python	Ret = ctypes.c_long() AiStopLevel = ctypes.c_float() AiDirection = ctypes.c_short() Ret.value = caio.AioGetAiStopLevelEx ( Id , 0 , ctypes.byref(AiStopLevel) , ctypes.byref(AiDirection) )