Rockwell-automation Logix5000 Controllers Controller Information and S Manual de usuario descargar pdf (Pagina 17)

Chapter 2

Determine controller memory information

Depending on your type of controller, the memory of the controller may be

divided into several areas.

If you have this controller Then it stores this In this memory

1756 ControlLogix

1756 GuardLogix

1768 CompactLogix

1768 Compact GuardLogix

I/O tags I/O memory

Produced / Consumed tags

Communication via Message (MSG) instructions

Communication with workstations

Communication with polled (OPC/DDE) tags that

use RSLinx software

Tags other than I/O, produced, or consumed tags Data and logic memory

Logic routines

Communication with polled (OPC/DDE) tags that

use RSLinx software

1769-L2x CompactLogix

1769-L3x CompactLogix

FlexLogix

DriveLogix

SoftLogix5800

These controllers do not divide their memory. They store all elements in one

common memory area.

(1) To communicate with polled tags, the controller uses both I/O data and logic

memory.

(2) 1756-L55M16 controllers have an additional memory section for logic.

To estimate how much controller memory your project requires, use the Memory

tab of the Controller Properties dialog box. For each of the memory areas of your

controller, the dialog box lets you estimate number of bytes of:

• Free (unused) memory.

• Used memory.

• Largest free contiguous block of memory.

Use the following steps to estimate the controller memory.

1. Start the Logix Designer application and open a controller project.

Introduction

Estimate memory

information offline

Rockwell Automation Publication 1756-PM015F-EN-P – October 2014 17

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Rockwell-automation Logix5000 Controllers Controller Information and S Manual de usuario Pagina 17