Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario descargar pdf (Pagina 97)

Advanced Instruction Set

Chapter 6

640

Done

and Enable Bits

The read and write bits are the enable bits for block transfer modules. Either

one (or both for a bidirectional transfer) is set in the program scan when the

rung containing the block transfer instruction is true.

The done bit is set in the I/O scan that the words are transferred, provided that

the transfer was initiated and successfully completed. The done bit remains set

for only one additional program scan.

Block transfer will be requested in each program scan that the read and/or write

bits remain set. The read and/or write bits are turned off when the rung

containing the instruction goes false.

Block

ransfer Read

Symbol: BLOCK

X-FER 1

Purpose: Reading information from a 1771 I/O module to the processor’s input

image table in one I/O scan.

Syntax: Programmed as an output instruction. This instruction requires two

words of your program.

Block Programming

Instructions

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 214 215

Sin comentarios

Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario Pagina 97