Select when you want to check the status of continuous analog input
AiSamplingCount |
Get the current number of samplings for 1Ch
e.g.) Sampling for
500 times in 2 channels, the number of data is 1000
AiSamplingCount is 500
AiRepeatCount |
Get the current number of repeat times
* For devices that cannot use repeat operation, the value that can be acquired
is "0".
AiStatus |
Get the current status of analog input
The followings are the meanings in bit of hexadecimal notation
Value |
Status |
Meaning |
00000001H |
Device is running |
This status is ON from performing [Start] to conversion stop/stop by error/stop by [Stop] This status is also ON when wait for the start trigger/delay sampling/ repeat operation |
00000002H |
Wait for the start trigger |
Range comparison, this status is ON from performing [Start] to satisfying the trigger condition. As the conversion starts, this status changes to be OFF Even if repeat operation, this status changes to be ON each time the state is waiting for a trigger |
00000010H |
Store up to the specified number of data |
When the conversion data stored in the memory is up to the number of samplings set by AiSamplingTimes of [Start], this status changes to be ON In the case of FIFO memory, perform [Read] when this status is ON. If the number of data in buffer is less than the specified number, this status changes to be OFF This status changes to be OFF when performing [Start] or advanced function AioResetDevice_i.vi If AiSamplingTimes in [Start] is specified as 0, this status is always OFF |
00010000H |
Overflow |
When the buffer cannot contain the conversion data, this status changes to be ON At this time, in the case of FIFO memory, conversion stops In the case of RING memory, conversion continues and overwrites the old data This status changes to be OFF when performing [Start] or advanced function AioResetDevice_i.vi. |
00020000H |
Sampling clock error |
As the conversion speed is too fast, the error occurs, conversion stops and this status changes to be ON This status changes to be OFF when performing [Start] or advanced function AioResetDevice_i.vi |
00040000H |
AD conversion error |
Usually, this status is OFF, but when any error occurred, this status changes to be ON If this status changed to be ON, there may be a failure of the device If the problem is not resolved, please contact the window listed in [Contact] |
00080000H |
Driver spec error |
If the driver cannot process in time, the error occurs In the case of the device which uses the driver memory, the conversion needs [the conversion speed of device + the driver processing time] (The driver processing time depends on the environment) This error and [Sampling clock error] occur at the same time |
e.g.) When AiStatus is [11H] (In decimal
it's [17])
[Device is running] and [Store up to the specified
number of data] are ON
AiStopTriggerCount |
Get the number of sampling for 1Ch when a
stop trigger is input
* Since the CPS-AI-1608LI and CPS-AI-1608ALI cannot acquire the number
of sampling when the stop trigger is input, the value that can be acquired
is "0".
When performing continuous sampling for a long time in the FIFO memory, if [Read] is not executed at a certain period, convention data will over the amount of data the device or driver can hold, and sampling will stop. (Overflow) The [Store up to the specified number of data] (00000010H) status can be used for this reading period. There is a way to periodically read all the data like sample InfiniteAi.vi. You can also try to read a certain amount of data every time.
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