AioSetAiStartTrigger

Function

Sets the conversion start condition.

Format

Ret = AioSetAiStartTrigger ( Id , AiStartTrigger )

Parameters

Id [ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the Device ID retrieved from AioInit function.

AiStartTrigger [ C, C++ : short ] [ Python : ctypes.c_short ]
Sets the conversion start condition from the following range.
The available value differs by the device.

0	Software
1	External trigger rising edge
2	External trigger falling edge
3	Level comparison
4	In Range comparison
5	Out Range comparison
10	Event controller output

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.
11160	The value of AiStartTrigger 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 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.
21160	The value of AiStartTrigger is outside the designated range of the device being used

Initial value

Software start for all devices

Remarks

If the conversion start condition is "Level comparison", please use AioSetAiStartLevel function to set Level comparison start.
If the conversion start condition is "In Range comparison", please use AioSetAiStartInRange function to set In Range comparison start.
If the conversion start condition is "Out Range comparison", please use AioSetAiStartOutRange function to set Out Range comparison start.
If the event controller output is used as the clock, please use AioSetEcuSignal function to connect Event controller.
If you only perform this function, the connection of the event controller isn't changed.

This function cannot be used on devices without the analog input function.
If the device is in operation, the function cannot be performed.

Specifications based on devices

AI-1204Z-PE	Available AiStartTrigger is 0, 1, 2, 3, 4, 5, 10.
AI-1664UG-PE AIO-163202G-PE AIO-163202UG-PE AIO-123202G-PE AIO-123202UG-PE AIO-163202F-PE ADA16-32/2(PCI)F	Available AiStartTrigger is 0, 1, 2, 3, 4, 5, 10.
AIO-160802L-LPE ADA16-8/2(LPCI)L ADAI16-8/2(LPCI)L AIO-160802LI-PE	Available AiStartTrigger is 0, 1, 2, 3.
AI-1616L-LPE AD16-64(LPCI)LA AD16-16(LPCI)L ADI16-16(LPCI)L AI-1616LI-PE AI-1664LA-LPE	Available AiStartTrigger is 0, 1, 2, 3.
AD12-16(PCI)EV AD12-16U(PCI)EV AD16-16(PCI)EV AD16-16U(PCI)EV AIO-121601E3-PE AIO-121601UE3-PE AIO-161601E3-PE AIO-161601UE3-PE AI-1216I2-PCI	Available AiStartTrigger is 0, 1, 2, 3.
AD12-64(PCI) AD12-16(PCI)	Available AiStartTrigger is 0, 2, 3.
AI-1604CI2-PCI	Available AiStartTrigger is 0, 2, 3.
AI-1608AY-USB AIO-160802AY-USB AI-1608GY-USB AIO-160802GY-USB	Available AiStartTrigger is 0, 1, 2, 3.
AIO-163202FX-USB	Available AiStartTrigger is 0, 1, 2, 3, 4, 5, 10.
AI-1664LAX-USB	Available AiStartTrigger is 0, 1, 2, 3.
AIO-121602LN-USB AIO-120802LN-USB	Available AiStartTrigger is 0, 1, 2, 3.
AI-1608VIN-USB AI-1608AIN-USB AI-1608VIN-ETH AI-1608AIN-ETH	Available AiStartTrigger is 0, 1, 2, 3.
CPS-AI-1608LI CPS-AI-1608ALI	Available AiStartTrigger is 0.
AIO-16256256-DEMO	Available AiStartTrigger is 0, 1, 2, 3.

Precautions when using level comparison (range comparison) as the conversion start condition for USB devices

When using a USB device, level comparison is determined by driver software processing.
Therefore, when the StartAI() function is executed with the level comparison start condition, USB transfer of data between the USB device and the driver software will start.
If the USB transfer is not done in time even before the start condition is satisfied, the buffer overflow error on the USB device may occur.
If an error occurs, it is necessary to execute the AioResetAiMemory() function separately to clear the error.

Note that the following USB devices are designed to perform level comparison judgments in processing on the devices.
Therefore, improvements have been made so that buffer overflow does not occur before the start condition is satisfied.

AI-1608AIN-USB、AI-1608VIN-USB

Example

Sets "Software" as the conversion start condition.

C, C++	long Ret; Ret = AioSetAiStartTrigger ( Id , 0 );
Python	Ret = ctypes.c_long() Ret.value = caio.AioSetAiStartTrigger ( Id , 0 )