Справочник Пользователя для National Instruments 321645c-01

Chapter 2

Function Reference — GPCTR_Change_Parameter

NI-DAQ FRM for PC Compatibles

2-200

National Instruments Corporation

Note

The default source selection for all other applications is

ND_INTERNAL_20_MHZ.

Use this function with paramID =

ND_SOURCE_POLARITY

to select polarity of transitions to

use for counting.

Note

If you have configured an analog hardware trigger using the

Config_HW_Analog_Trigger

function, the resulting analog trigger circuitry

output is available as

ND_PFI_0

Table 2-22. Definition of Other Counter for paramValue Set to

ND_OTHER_GPCTR_TC

gpctrNum

Other Counter: E Series,

All DSA (445X and 455X)

Devices

Other Counter: 6602 Devices

ND_COUNTER_0

ND_COUNTER_1

ND_COUNTER_0

ND_COUNTER_2

N/A

ND_COUNTER_3

N/A

ND_COUNTER_2

ND_COUNTER_4

N/A

ND_COUNTER_5

N/A

ND_COUNTER_4

ND_COUNTER_6

N/A

ND_COUNTER_7

N/A

ND_COUNTER_6

Table 2-23. Default Source Selection for

ND_SIMPLE_EVENT_CNT

ND_BUFFERED_EVENT_CNT

gpctrNum

E Series and 445X Devices

6602 Devices

455X Devices

ND_COUNTER_0

ND_PFI_8

ND_PFI_39

ND_PFI_31

ND_COUNTER_1

ND_PFI_3

ND_PFI_35

ND_PFI_27

ND_COUNTER_2

N/A

ND_PFI_31

N/A

ND_COUNTER_3

N/A

ND_PFI_27

N/A

ND_COUNTER_4

N/A

ND_PFI_23

N/A

ND_COUNTER_5

N/A

ND_PFI_19

N/A

ND_COUNTER_6

N/A

ND_PFI_15

N/A

ND_COUNTER_7

N/A

ND_PFI_11

N/A