Interpret the controller leds – Rockwell Automation 1756-L53 Logix5553 Controller Installation Instructions User 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.
40002
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