Voltage-controlled mode

In voltage-controlled mode, multi-color LEDs must always be used with a series resistor to protect the LEDs against destruction. The commissioning and control of a multi-color Common Anode LED in voltage-controlled mode is described below. Unless stated otherwise, the step described must be performed for all EL2596 terminals with the multi-color Common Anode LED.

  1. Nominal/limit current of the LED in index 0x8000:02 “Target current” in the unit mA.
  2. Input voltage in index 0x8000:03 “Supply voltage” in the unit 0.01 V.
  3. Desired output voltage in index 0x8000:04 “Output voltage” in the unit 0.01 V. This value must be identical for all EL2596 terminals operated with the multi-color Common Anode LED.
  4. Set the operation mode in the CoE directory in index 0x8004:01 to “Voltage Control PWM”
    5. Voltage-controlled mode 1:
    Operation mode setting “Voltage control PWM”
  5. Set Predefined PDO Assignments to “PWM (with info data)”
    6. Voltage-controlled mode 2:
    PDO setting “PWM (with info data)”
  6. The PWM duty cycle can then be specified for each color (each EL2596) under “DOX PWM duty” → “PWM duty”. The higher the specified duty cycle, the brighter the color. The visible emitted color results from the mixture of colors in the multi-color LED.
  7. Check under “DOX Status” → “Status” whether the “Ready to activate” bit is 1.
  8. Activate the control under “DOX Control” → “Control” via the “Enable” bit.
  9. Switch on the LED output under “DOX Control” → “Control” by activating the “Output” bit.
Voltage-controlled mode 3:
Activating the output in the operation mode “Voltage control PWM”