Spectrum-controls 1771sc-IFE32 Manual de usuario descargar pdf (Pagina 37)

Chapter 5: Module Status and Input Data 27

Chapter 5

Module Status and Input Data

Chapter Objectives:Chapter Objectives:

Chapter Objectives:

In this chapter, we describe:

· reading data from your module

· block transfer read block format

Reading Data frReading Data fr

Reading Data fr

om om

our Moduleour Module

our Module

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.

Module input data is passed from the 1771sc-IFE32 to the PLC via a Block Transfer

Read. Two BTR formats are supported.

BlocBloc

Bloc

k k

ransfransf

ransf

er Read (BTR) Mapser Read (BTR) Maps

er Read (BTR) Maps

Purpose:

41 Module data only

64 Module data and configuration

During normal operation, the processor transfers 41 words to the module when you

program a BTR instruction to the module’s address. When user scaling and configu-

ration echo are desired 64 words are transfered.

The block memory maps are shown below:

Module Data BTRModule Data BTR

Module Data BTR

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

0 Diagnostic Data Byte CE HF EE CS RT IS OR PU Diagnostics

1 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Channel Fault

2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Channel Fault

3 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Under Range

4 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Under Range

5 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Over Range

5 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Over Range

7 16151413121110 9 8 7 6 5 4 3 2 1 Sign

8 3231302928272625 2423222120191817 Sign

9 Channel 1 Data Data

10 Channel 2 Data Data

...

40 Channel 32 Data Data

In differential mode every other channel is skipped. For example: Word 9 = Channel 1,

Word 11 = Channel 2, Word 13 = Channel 3...

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 49 50

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