Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario descargar pdf (Pagina 308)

100

101

Preface

MicroLogix 1000 Programmable Controllers User Manual

B–20

Address DescriptionClassificationBit

S:23 Reserved NA NA

S:24 Index

Status

This word indicates the element offset used in

indexed addressing.

When an STI, high-speed counter, or Fault

Routine interrupts normal execution of your

program, the original value of this register is

restored when execution resumes.

S:25 to

S:29

Reserved NA NA

S:30 STI

Setpoint

Dynamic

Configuration

You ente

r t

he timebase to be used in the

selectable timed interrup

t (

STI). The time can

range from 10 to 2550 ms. (This is in 10ms

increments, so valid values are from 0–255.)

Your STI routine executes per the value you

enter. Write a zero value to disable the STI.

To provide protection from inadvertent alteration

of your selection, program an unconditional MOV

instruction containing the setpoint value of your

STI to S:30, or program a CLR instruction at S:30

to prevent STI operation.

If the STI is initiated while in the REM Run mode

by loading the status registers, the interrupt starts

timing from the end of the program scan in which

the status registers were loaded.

S:31 to

S:32

Reserved NA NA

1 2 ... 303 304 305 306 307 308 309 310 311 312 313 ... 421 422

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