Module Hardware Diagnostics
Original instructions
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LED Indicators
The BMX NOC 0401 module displays the following indicators in the LED display area:
The module also displays the following LED indicators next to each Ethernet port connector:
LED Descriptions
Use the LED display to diagnose the state of the module, as follows:
LED
Color
Description
RUN
Green
  • Off: Indicates that the module is not communicating with the CPU over the backplane.
  • Steady Green: Indicates that the module:
    • has just been turned on and has not yet started the LED power-up test, or
    • is communicating with the CPU over the backplane
ERR
Red
  • Off: The module is operating normally.
  • Blinking Red: The module is not configured (or the configuration is in progress), or backplane communication has stopped.
  • Steady Red: The module has detected an event.
MS (Module Status)
Green/ Red
  • Off: Power is not being supplied to the module.
  • Steady Green: The module is operating normally.
  • Blinking Green: The module has not been configured.
  • Steady Red: The module has detected a major event.
  • Blinking Red: The module has detected a recoverable event.
NS (Network Status)
Green/ Red
  • Off: Power is not being supplied to the module, or the module has not been assigned an IP address.
  • Steady Green: The module has established at least one CIP connection.
  • Blinking Green: The module has obtained an IP address but has not established any CIP connections.
  • Steady Red: The module has detected that its IP address is a duplicate IP address.
  • Blinking Red: One or more CIP connection (with the module as target) have timed out.
ETH STS (Ethernet Status)
Amber
  • Off: No power is supplied to the module.
  • Steady Amber: Indicates that the module is operating normally.
  • Four flashes: The module has detected a duplicate IP address.
  • Five flashes: The module is waiting for a served IP address.
  • Six flashes: The module is using its default IP address.
  • Seven flashes: The module has detected a configuration error.
NOTE: If more than one diagnostic condition exists simultaneously, the Ready LED displays the shortest flash sequence.
LNK (Link)
Yellow/ Green
  • Off: An Ethernet link has not been established.
  • Yellow: A 10 Mbit Ethernet link has been established
  • Green: A 100 Mbit Ethernet link has been established
ACT (Activity)
Green
  • Off: There is no receive or transmit activity.
  • Flashes Green: Indicates activity.