Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario descargar pdf (Pagina 97)

100

101

Using Analog

5–5

Converting Analog Data

The analog input circuits are able to monitor current and voltage signals and convert

them to digital data. There are six terminals assigned to the input channels that

provide two voltage inputs, two current inputs and two return signals (commons).

The analog outputs can support either a current

voltage function. There are three

terminals assigned to the output channels that provide one voltage output, one

current output and a common (shared) terminal.

The following table shows sample Analog Signal and Data W

ord values using the

nominal transfer function formula:

N=I

x 32767/21 where I

(analog signal) is in milliamperes (mA)

N=V

x 32767/10.5 where Vin (analog signal) is in volts (V)

N=(I

out

– 4 mA) x 32767/16 mA where I

out

(analog signal) is in

milliamperes (mA)

N=V

out

x 32767/10V where V

out

(analog signal) is in volts (V)

Analog Signal Data Word

Input Output

0V 0 0

5V 15603 16384

10V 31207 32767

6241 0

1 mA

17164 14336

20 mA

31207 32767

Converting Analog Input Data

Analog inputs convert current and voltage signals into 16-bit two’

s complement

binary values. To determine an approximate voltage that an input value represents,

use one of the equations shown on the following page.

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 421 422

Comentarios a estos manuales

Sin comentarios

Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario Pagina 97

Comentarios a estos manuales

Relacionado con productos y manuales para Equipo Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers