Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual Instrukcja Użytkownika Pobierz pdf (Strona 36)

4–5

Preliminary Operating Considerations

Publication

17466.8 - April 1997

The module update time is defined as the time required for the

module to sample and convert the input signals of all enabled input

channels and provide the resulting data values to the SLC processor.

Module update time can be calculated by adding the the sum of all

enabled channel sample times (0.75 msec per channel).

The 1746-NI8 module sequentially samples the channels in a

continuous loop.

Channel

0 Disabled

Channel 1 Disabled Channel 2 Disabled Channel 3 Disabled

Sample

Channel 0

Sample

Channel 1

Sample

Channel 2

Sample

Channel 3

Enabled Enabled Enabled Enabled

Channel

4 Disabled

Channel 5 Disabled Channel 6 Disabled Channel 7 Disabled

Sample

Channel 4

Sample

Channel 5

Sample

Channel 6

Sample

Channel 7

Enabled Enabled Enabled Enabled

The following table shows the module update time. The module

update time is the same regardless of the filter frequency. The fastest

module update time occurs when only one channel is enabled. The

slowest module update time occurs when 8 channels are enabled.

Module Update Time

Number of Channels Enabled Update Time

1 0.75 msec

2 1.50 msec

3 2.25 msec

4 3.00 msec

5 3.75 msec

6 4.50 msec

7 5.25 msec

8 6.00 msec

Module Update Time

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 90 91

Komentarze do niniejszej Instrukcji

Brak uwag

Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual Instrukcja Użytkownika Strona 36

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Ekwipunek Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual