User Manual
Chapter 2
GFK-2849A
Oct 2019
Installation
23
2.8
Powerup Indicator LED Patterns
At powerup, the indicator LEDs show the blink patterns described below. The LEDs also blink
diagnostic patterns for certa
in operating errors and for module identification. See “
” for a description of the blink patterns.
Step LED/ Blink pattern
Description
1
All LEDs off
Normal operation, unpowered state
2
STATUS LED solid Green
Normal operation, power on
OK LED blinks Amber with coded
blink pattern
Fatal Initialization or Diagnostics Failure, H/W
Module Identity Information not available
OK, LAN, and STATUS LEDs blink
green in unison (0.5 second ON/
0.5 second OFF)
Invalid firmware detected. Module is waiting for
firmware update. Blink pattern continues during
firmware update.
3
LAN and STATUS LED solid Green
Normal operation
4
LAN LED solid Green
Normal operation
LAN and STATUS LED blink Green
(0.5 second ON and 0.5 second
OFF)
Update of module firmware. After the automatic
update completes, the LEDs blink Amber and the
module resets, which restarts the powerup process.
5
OK LED blinks Green (0.5 second
ON and 0.5 second OFF)
Module powerup completed, but communication
not yet established over the RX3i backplane.
OK LED solid Green
Normal operation. Powerup completed and
backplane communications established.
Note:
Under certain ambient operating temperatures, the ECM850 may momentarily display the
overtemperature pattern during power up, while it is calibrating its thermal protection
functions. This indication may be ignored, and no overtemperature entry is added to the
Local Log table, the Controller Fault table or I/O Fault table
2.8.1
Detailed Indicator LED Descriptions
OK LED
The OK LED indicates whether the module is able to perform normal operation.
Green, ON steady
OK
Green, blink pattern
Fatal error. Flashes once between error codes blinked on
the STATUS LED.
OFF
Not OK
LAN LED
The LAN LED indicates access to and activity on the Ethernet network. The LAN LED indicates
network packets are being processed by the network interface (not just passing through the
embedded switch).
Blinking ON
The m
odule’s network interface is active
Blink pattern
Fatal error. Flashes once between error codes blinked on
the STATUS LED