Setting Timing
③ Analog Input [ai_timing.vi]

 

 

Select for continuous analog input

 

Layout of IN/OUT terminal

 

IN terminal

AiClockType

[-1] Can be set

Initial value: 0 (Internal clock)

Specify the clock type (Internal clock/External clock)

0: Internal clock
1: External clock
2: Synchronous Control Signal 1
3: Synchronous Control Signal 2
4: Synchronous Control Signal 3

 

AiSamplingClock

[-1] Can be set

Initial value: 1000 (uSec)

Specify the speed of internal clock in uSec

*The range of configurable clocks varies depending on the device
  Please refer to [Device-specific Setting List]

 

AiRepeatTimes

[-1] Can be set

Initial value: -1 (Not change)

Specify the number of repeat times

Repeat action is the action from the sampling start to stop, which is performed for multiple times

0  : Repeat action is repeated infinitely
1  : Not perform repeat action (Stop for sampling 1 time)
2 or more: Repeat action is performed in the specified times

*In the initial state and if terminal is not connected, which is same as specify this terminal to 1. Not perform repeat action

*The USB devices except for AIO-163202FX-USB do not support repeat action
  Specify -1 to cancel this terminal, or specify 1

*Whether repeat action can be performed and the upper limit of repeat times depend on devices
  Please refer to [Device-specific Setting List]

 

AiClockEdge

[-1] Can be set

Initial value: -1 (Not change)

Specify the edge of external clock (Rising/Falling)

0: Falling edge
1: Rising edge

*In the initial state and if terminal is not connected, which is same as specify this terminal to 0. Falling Edge is set

*The configurable external clock edge varies depending on the device
  Please refer to [Device-specific Setting List]

 

AiMemoryType

[-1] Can be set

Initial value: 0 (FIFO)

Specify the memory type (FIFO memory/RING memory)

0: FIFO
1: RING

 

About memory type (FIFO/RING)

Memory for data storage of analog input/output devices can be used in two formats, they are FIFO and RING.
Generally, memory is used in FIFO, but depending on the application, memory will be used in RING.

Please refer to the table below for features of each format and proper usage.

Analog input

FIFO

RING

Acquire data

Get all of the data

Acquire data before and after stop trigger

When buffer was full

Stop by overflow

Overwrite the old data

Analog output

FIFO

RING

Output data

After starting output, add data during the operation

Determine the data before the output

The same data is output repeatedly

When all the data was output

Stop

Repeat output is also possible

 

AiScanClock

[-1] Can be set

Initial value: -1 (Not change)

Specify the scan clock (delay time between 2 channels) in uSec
When analog input by multiple channels, a time difference set in this terminal will be produced by acquiring the analog data for each channel

*In the initial state and if terminal is not connected, the minimum value (the fastest speed) of device is set

*Whether the scan clock can be set or not, and the range of available value depend on device
  Pleasd refer to [Device-specific Setting List]

 

AiStopDelayTimes

[-1] Can be set

Initial value: -1 (Not change)

Specify the number of delay samplings
Delay samplings is the sampling which is performed after the sampling stop conditions are satisfied
If the [Setting for Stop] isn't [Software], this terminal can be used

*In the initial state and if terminal is not connected, which is same as specify this terminal to 0. Not perform delay sampling