System features
70
X20 system User's Manual 3.10
2.11.1 re LEDs
Each X20 system module has a LEDs for diagnostics at the top.
The operating state of the module firmware is indicated by the two topmost LEDs r (green) and e (red).
Additional LEDs depend on the module and generally indicate the status of I/O channels. Green LEDs are usually
used for inputs, while yellow is used for outputs. These I/O LED status indicators are only operational in RUN
mode on some modules.
There is a difference between "blinking" and "single flash": when blinking, the LED is on 50% of the time and off
50% of the time; with single flash, the LED only flashes quickly. With "double flash", the LED blinks twice quickly
followed by a pause.
LED
r (green)
e (red)
Description
Note
Off
Off
No power to module
Module does not have power.
Single flash
On
Firmware is not valid
Invalid firmware. Occurs when a firmware update has been interrupted.
The firmware is reloaded as soon as the X2X Link master is active again,
but only if the module is also specified in the configuration.
Single flash
Off
RESET mode
Module not yet detected by the X2X Link master
Double flash
Off
BOOT mode
(RESET mode with communi-
cation)
Usually a firmware transfer. Some modules remain in single flash mode
with a firmware transfer. Depending on the configuration, a firmware
transfer can take several minutes.
Blinking
Off
PREOPERATIONAL mode
Modules whose slot is configured for a different module (or none at all)
remain in PREOPERATIONAL mode. It could be that an incorrect mod-
ule is inserted. An incorrect slot number might be set for bus modules
with node number switches.
On
Off
RUN mode
Everything is OK.
On
Blinking
RUN mode with an I/O channel
error
An error or warning is present on one or more I/O channels.
Which channel error on the module is being indicated depends on the
module and can be determined with the respective module description.
On
On
RUN mode with a module error The module has an error that affects all of its channels.
If no LEDs are lit, then the module is not supplied with power.
If the green r LED is constantly lit and the red e LED is off, then everything is OK.
If the modules remain in a green single flash mode, there is no connection to the X2X Link master, or the X2X Link
master is not yet running. Single flash is output for some modules during a firmware update.
If the module outputs a green double flash, the firmware is being updated. This can take several minutes depending
on the configuration. A firmware update usually only takes place once after the module has been replaced or if
new firmware has been loaded to the master CPU during a project update.
If the modules are blinking green, it means that there are different X2X Link modules in that slot (or none at all).
Summary of Contents for X20 System
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