Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario descargar pdf (Pagina 189)

100

101

Using

Application Specific Instructions

11–1

Using Application Specific

Instructions

This chapter contains general information about the application specific instructions

and explains how they function in your application program. Each of the

instructions includes information on:

• what the instruction symbol looks like

• typical execution time for the instruction

• how to use the instruction

In addition, the last section contains an application example for a paper drilling

machine that shows the application specific instructions in use.

Application Specific Instructions

Instruction

Purpose

Page

Mnemonic Name

Purpose

Page

BSL and

BSR

Bit Shift Left and

Bit Shift Right

Loads a bit of data into a bit array, shifts the pattern

of data through the array, and unloads the last bit of

data in the array. The BSL shifts data to the left and

the BSR shifts data to the right.

11–5

SQO and

SQC

Sequencer Output

and Sequencer

Compare

Control sequential machine operations by transfer-

ring 16-bit data through a mask to image addresses.

11–7

SQL Sequencer Load Capture referenced conditions by manually stepping

the machine through its operating sequences.

11–13

STD and

STE

Selectable Timer

Interrupt Disable

and Enable

Output instructions, associated with the Selectable

Timed Interrupt function. STD and STE are used to

prevent an STI from occurring during a portion of

the program.

11–18

Continued on the next page.

Programming

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