Prepare the controller for updating, Controller configuration, Sequence of operation – Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers User Manual
Page 130: Missing/corrupt os led pattern
Publication 1762-UM001G-EN-P - March 2011
D-2 Use Control Flash to Upgrade Your Operating System
Prepare the Controller for Updating
Controller Configuration
The controller must be configured for default communications (use
communications toggle push button; DCOMM LED on) and be in the
Program mode to allow the download of a new operating system.
Sequence of Operation
The following steps detail the key events in the upgrade process.
1.
Controller mode and communications parameters are checked.
2.
Download begins.
3.
During the download, the Force, Battery, and Comms LEDs perform a
walking bit pattern.
4.
When the download is complete, the integrity of the new OS is checked.
If the new OS is corrupt, the controller sends an error message to the
download tool and flashes the Missing or Corrupt OS LED pattern. See
Missing/Corrupt OS LED Pattern below.
5.
Following a successful transfer, the Power, Force, and Battery LEDs
flash on and remain on for five seconds. Then the controller resets.
Missing/Corrupt OS LED
Pattern
When an operating system download is not successful or if the controller does
not contain a valid operating system, the controller flashes the Run, Force, and
Fault LEDS on and off.