Fieldbus / DeviceNet LEDs

DeviceNet Status LED

The red/green LED pair provides information about the device and communication status of the ILxxxx-B520. The LEDs acts as the bi-color combined Module/Network Status LED defined in the DeviceNet Specification.

The LED pair is located next to the configuration interface for adjustment of the DeviceNet address (MacId)

States of Module / Status LED

LED State

Description

Green Flashing

Boot Up OK, Device has executed Duplicate MacId Check and is ON-Line. The ILxxxx-B520 is not allocated by a Master / Scanner, no Data Exchange with a Master / Scanner

Green ON

No Error, ILxxxx-B520 is allocated by a Master / Scanner, Data Exchange (Explicit or IO) with Master / Scanner is OK

Green OFF

  • Bus Sense Error (24V DeviceNet Voltage in not available)
    (all LEDs off, including IO-Run, IO-Error LEDs)
  • No BaudRate, ILxxxx-B520 is not able to detect BaudRate
    (IO-Run, IO-Error LEDs On)

Red Flashing

Time Out, IO-Connection has timed out

Red ON

  • Duplicate MacId Fault, check for same Address in Network
  • Bus-Off, check cabling, check bus termination, check bus
    length
  • Receive/Transmit Overrun, reduce IO-Cycle Time / Interscan
    delay at Master / Scanner

Red OFF

  • Bus Sense Error (24V DeviceNet Voltage in not available)
    (all LEDs off, including IO-Run, IO-Error LEDs)
  • No BaudRate, ILxxxx-B520 is not able to detect BaudRate
    (IO-Run, IO-Error LEDs On)