Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual Manual do Utilizador descarregar pdf (Página 67)

8–2

Application Examples

Publication

17466.8 - April 1997

Channel Configuration

Configure channel 0 of the 1746-NI8 module with the following

setup:

• 4–20 mA input type

• engineering units data format

• zero data word in the event of an open circuit

• 10 Hz input filter to reject high frequency noise and provide

rejection of 60 Hz line noise

Channel Configuration Worksheet

(With Settings Established for Channel 0)

•

Input Type

• Data Format

• Open Circuit

• Filter Frequency

• Channel Enable

• Not Used

Channel 0 - N10:0

Channel 1

Channel 2

Channel 3

1112131415

0000

910 8 67450123

0000

Bit Number

Channel 4

Channel 5

Channel 6

Channel 7

0000

1101000100 00

Bit Definitions:

Bits 0-2

Input Type

000 = ±10V dc

001 = 1-5V dc

010 = 0-5V dc

011 = 0-10V dc

100 = 0-20 mA

101 = 4-20 mA

110 = ±20 mA

111 = 0-1 mA

Bits 3- 5 Data Format

000 = engineering units

001 = scaledforPID

010 = proportional counts

011 = 1746NI4 data format

100 = user defined scaling

101 = user defined scaling

110 = illegal

111 = illegal

Bits 6 and 7 Open Circuit 00 = zero 01 = upscale 10 = downscale 11 = illegal

Bits 8-10 Filter Frequency

000 = no filter

001 = 75 Hz

010 = 50 Hz

011 = 20 Hz

100 = 10 Hz

101 = 5 Hz

110 = 2 Hz

111 = 1 Hz

Bit 11 Channel Enable 0 = channel disabled 1 = channel enabled

Bits 12-15 Not Used 0000 = always make this setting

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 90 91

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