Rockwell Automation 1756-L53 Logix5553 Controller Installation Instructions - Manual (Page 13)

Logix5553 Controller 13
Publication 1756-IN017A-EN-P - August 2000
Interpret the controller LEDs
Indicator: Color: Description:
RUN off The controller is in Program or Test mode.
green The controller is in Run mode.
I/O off Either:
•
There are no devices in the I/O
configuration of the controller.
• The controller does not contain a
project (controller memory is
empty).
green The controller is communicating with all the
devices in its I/O configuration.
green flashing One or more devices in the I/O configuration
of the controller are
not responding.
red flashing The chassis is bad. Replace the chassis.
RS232 off There is no activity.
green flashing Data is being received or transmitted.
BAT off The battery will support memory.
red The battery is not present or may not support
memory. Replace the battery.
OK off No power is applied.
red flashing Recoverable fault
red Non-recoverable fault. To correct:
1. Cycle the chassis power.
2. Download the project.
3. Place the controller in Run mode.
If the problem continues to occur, contact
your Rockwell Automation representative or
local distributor.
green The controller is OK.
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