Rockwell-automation 1771-IFE ANALOG INPUT MODULE Manual de usuario descargar pdf (Pagina 43)

Chapter

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    

In this chapter, we describe:

• reading data from your module

• block transfer read block format

Block transfer read programming moves status and data from the

input module to the processor’s data table in one I/O scan

(Figure 5.1). The processor’s user program initiates the request to

transfer data from the input module to the processor.

Figure 5.1

Word Assignments for Analog Input Module (1771ĆIFE/C) Block Transfer Read

Dec. Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Description

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Description

!.0%         *"(-.12*$1

                 "2" 3-%&00"-(& '.0 $)"--&+1 



                 "2" .4&00"-(& '.0 $)"--&+1 



                 "2" /.+"0*27 '.0 $)"--&+1 

 )"--&+  -/32 )"--&+  -/32

 )"--&+  -/32 )"--&+  -/32

 )"--&+  -/32 )"--&+  -/32

 )"--&+  -/32 )"--&+  -/32

⇓⇓⇓⇓

 )"--&+  -/32 )"--&+  -/32

                 ''1&2 "+*#0"2*.- &13+21

                 "*- "+*#0"2*.- &13+21

!)&0&   .5&0 3/ #*2

  32 .' 0"-(& #*2

  -4"+*% 1$"+*-( #*2

  &"+ 2*,& 1",/+*-( #*2

  "0%5"0& "3+2

   12"231 #*21

  "+*#0"2*.- 12"231 #*21



)&1& #*21 "0& 1&2  "2 "//0.6*,"2&+7 2)& *-/32 0"-(& +*,*21 1&+&$2&% "#+& 

During normal operation, the processor transfers up to 20 words (22

during calibration) to the module when you program a BTR

instruction to the module’s address.

When a BTR length of 0 is programmed, the 1771-IFE/C will

respond with the series A module default length of 20.

Chapter Objectives

Reading Data From Your

Module

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 81 82

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