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      Q.series X Diagnostic LED Codes

      This article provides details about the diagnostic LED codes for Q.series X (XL/XE/XP) modules.

      LED Codes for Module Status

      The Q.series X modules feature three LEDs (A = Blue, B = Green, C = Red) that provide status information.

      • Blue LED – Indicates the module status.
      • Green LED – Indicates the communication bus status:
        • Q.series XL: Localbus status (Configuration | Run | Timeout)
        • Q.series XE: EtherCAT bus status (INIT | PRE_OP | SAFE_OP | OP)

      • Red/Green LED – Indicates the analog input status:

        • Green: The analog input is configured, and no range error is detected.

        • Red: The analog input is configured, but a range error has occurred.

      When a configuration file is downloaded via Localbus, the red/green LED flashes to indicate that the download is active.


      The Q.series XE EtherCAT Slave modules have specific LED codes to indicate module status:

      • Blue LED: 5s ON - 500ms OFF - 5s ON
        This flashing sequence indicates that the module is in configuration mode. After a GetLifeList command, the module can be configured differently through the RS485 interface. The GetLifeList is only possible when the module is in PRE_OP or INIT state. After this, a file can be downloaded, and the module can be reconfigured.

      • Blue LED: 5s ON - 500ms OFF - 500ms ON - 500ms OFF - 5s ON
        This flashing sequence indicates that the module is in sniffer mode. In sniffer mode, the module is only used to read the measured results. This mode allows the module to be checked using the USB-RS485 interface without the EtherCAT interface. The sniffer mode can be started with ICP100 when the COM interface is configured to RS232 RF-modem at 115.200 baud, 8e1.

      LED Fault Code Explanation

      When a hardware or configuration failure is detected, the blue and red/green LEDs signal the failure code.

      1. Blue LED: Flash 1x - Break - Flash 1x
        This flashing sequence indicates a problem with the module's application program. The flashing sequence of the red LED indicates the specific failure:

        • Flash 1x - Break - Flash 1x: Incorrect calibration file
        • Flash 2x - Break - Flash 2x: Incorrect FPGA code
        • Flash 3x - Break - Flash 3x: DIP switch access failure (timeout)
        • Flash 4x - Break - Flash 4x: Socket EEPROM access failure (timeout)
        • SOS (Blue and Red LED): A mismatch between the configuration file in the socket EEPROM and the module EEPROM.
      2. Blue LED: Flash 2x - Break - Flash 2x
        This flashing sequence indicates a problem with the module's operating system. The flashing sequence of the red LED indicates the specific failure:
        • Flash 1x - Break - Flash 1x: Incorrect calibration file
        • Flash 2x - Break - Flash 2x: Incorrect FPGA code
        • Flash 3x - Break - Flash 3x: Application (APP) cannot be read
        • Flash 4x - Break - Flash 4x: FPGA cannot be found
        • Flash 5x - Break - Flash 5x: Calibration file codes are not accepted for this module
        • Flash 6x - Break - Flash 6x: ET1100 configuration file cannot be read
        • Flash 7x - Break - Flash 7x: DDR access or reset failure