LED Diagnostic
Original instructions
About us
Overview
LED indicators report the behavior of the module and its communications with the network. LED indicators appear as words or abbreviations at the top of the module.
LED Display
This is the LED display located on the front panel of the BMECXM module:
Each LED of the BMECXM module is located with a corresponding positioning letter used in the input parameter CXM_DISPLAY of the module device DDT:
A = RUN
B = ERR
C = I/O
D = BS
E = CAN RUN
–
G = CAN ERR
–
F = CAN COM
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LED State and Flash Rates
This table describes the LED state used in the following tables for diagnosing the module:
LED State
Flash Rate
State Symbol
LED off
Constantly OFF
LED on
Constantly ON
LED blinking
Iso-phase:
  • 200 ms ON
  • 200 ms OFF
LED flashing
One short single flash:
  • 200 ms ON
  • 1200 ms OFF
One of the possible patterns
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LED Description
This table describes the RUN, ERR, I/O, and BS LED states and colors of the BMECXM module:
LED
Color
State
Description
RUN
Green
On
The module is in RUN state.
Off
  • There is no power to the module, or
  • Module configuration failed (see ERR LED for identifying the detected error).
Blinking
  • The power on self-test is running, or
  • A firmware update is in progress (see BS LED to confirm).
ERR
Red
On
  • Critical error detected while running the power-on self-test (INITIALIZATION phase failed), or
  • Error detected while getting IP address via DHCP (duplicate address).
Off
No errors detected.
Blinking
  • The power on self-test is running, or
  • An error detected while retrieving the FDR file.
I/O
Red
Off
Signification is depending on the module status:
  • If the module is in not in RUN state:
    • A firmware update is in progress (see BS LED to confirm).
    • Module configuration failed (see ERR LED for identifying the detected error).
  • If the module is in RUN state, the combination of I/O and CAN ERR LEDs provides a CANopen diagnostic.
On
The CANopen fieldbus state is NO-CONF or BUS OFF.
Blinking
Signification is depending on the module status:
  • If the module is in not in RUN state, the power-on self-test is running.
  • If the module is in RUN state, the combination of I/O and CAN ERR LEDs provides a CANopen diagnostic.
BS (bus status)
–
Off
  • Module is not configured, or
  • Module is waiting for IP address from DHCP.
Green
On
All EtherNet/IP connections are established.
Flashing
The module has an IP address, but there is no EtherNet/IP connection.
Blinking
The power on self-test is in progress.
Red
On
There is a duplicate IP address.
Flashing
At least one EtherNet/IP connection is lost. The LED flashes until the connection is re-established or the module is reset.
Yellow
Blinking
The loading of the firmware is in progress.
This table describes the CAN RUN, CAN ERR, and CAN COM LED states and colors of the CANopen fieldbus:
LED
Color
State
Description
CAN RUN
Green
Off
There is no power to the module.
On
The CANopen fieldbus state is OPERATIONAL.
Blinking
The CANopen fieldbus state is PRE-OPERATIONAL.
Flashing
The CANopen fieldbus state is STOPPED.
CAN ERR
Red
On
  • No CANopen device is configured, or
  • CANopen fieldbus state is BUS OFF
Off
No CANopen error detected.
Flashing
At least one of the detected error counters has reached or exceeded the warning level (too many error frames).
CAN COM
Yellow
Flashing
There is an SDO message.
General Diagnostic
A general diagnostic of the module is possible when you observe the four upper LEDs (RUN, ERR, I/O, and BS) in combination:
LEDs
Condition
RUN
ERR
I/O
BS
Firmware download.
RUN
ERR
I/O
BS
Power is off.
CXM_OP_STATE=IDLE
RUN
ERR
I/O
BS
Power-on self-test is in progress.
CXM_OP_STATE=INITIALIZATION
RUN
ERR
I/O
BS
The power on self-test failed.
CXM_OP_STATE=INITIALIZATION
RUN
ERR
I/O
BS
The power on self-test is completed and the module proceed to:
  • Backplane initialization,
  • Get IP address (from DHCP),
  • Get configuration file (from FDR server).
CXM_OP_STATE=UNCONFIGURED
RUN
ERR
I/O
BS
Error detected while getting IP address via DHCP (duplicate address(2)).
CXM_OP_STATE=UNCONFIGURED
RUN
ERR
I/O
BS
Valid IP address but no EtherNet/IP connection.
CXM_OP_STATE=CONFIGURED
RUN
ERR
I/O(1)
BS
EtherNet/IP connections established.
CXM_OP_STATE=CONNECTED STOP, CONNECTED RUN, or FALLBACK
RUN
ERR
I/O(1)
BS
EtherNet/IP connections are closed.
CXM_OP_STATE=CONNECTED STOP, CONNECTED RUN, or FALLBACK
RUN
ERR
I/O(1)
BS
Detected communication failure.
CXM_OP_STATE=CONNECTED STOP, CONNECTED RUN, or FALLBACK
(1) The status of the I/O LED in combination with CAN ERR LED gives information on I/O exchange with CANopen devices. (2) In case of duplicate IP address, the LED BS is blinking at the start-up phase then the module restarts.
CANopen LED Diagnostic
The module in RUN state is a prerequisite to diagnose the I/O exchange with CANopen devices with the LEDs.
The following tables give diagnostic when you observe the I/O and CAN ERR LEDs in combination:
LEDs
Condition
RUN
ERR
I/O
BS
No device configured, or
CANopen bus is off (physical wire is bus off).
CAN RUN
CAN ERR
CAN COM
LEDs
Condition
RUN
ERR
I/O
BS
Configuration detected error, communication detected error on CANopen device or CANopen device absent on bus.
CAN RUN
CAN ERR
CAN COM
LEDs
Condition
RUN
ERR
I/O
BS
No error detected.
CAN RUN
CAN ERR
CAN COM