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Programming – Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers User Manual

Page 85

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Programming Overview

4–9

If retentive data was lost on power down, the backup data from the EEPROM is
transferred to the RAM and used as the retentive data. In addition, status file bit
S2:5/8 (retentive data lost) is set and a recoverable major error occurs when going to
run.

CPU

EEPROM

Backup Data

Retentive Data

Program Files

RAM

CPU Workspace
Retentive Data
Program Files

Programming Device

Programming