Problem Setting the LED Notification Duration on Red Series

Product Support Hardware & Firmware Help
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I am trying to use the notification LED bar across 3 Z-Wave products. It’s not working as I expected.

Environment:

  • Controller: Home Assistant with Z-Wave JS

  • Devices: LZW30-SN (Switches), LZW31-SN (Dimmers), LZW36 (Fan/Light Combo)

Objective: Trigger a synchronized LED notification across 15 switches.

  • Effect: Solid

  • Color: Red (0)

  • Brightness: 10% (Level 1)

  • Duration: 10 Hours

The Setup: According to the documentation and the Inovelli Switch Toolbox, a duration between 121 and 254 calculates hours using the formula value - 120. To achieve 10 hours, the duration byte must be 130.

The resulting 4-byte integer is 25297152.

  • Byte 4 (Effect): 1

  • Byte 3 (Duration): 130

  • Byte 2 (Level): 1

  • Byte 1 (Color): 0

The Problem: I am broadcasting this configuration to all switches simultaneously at exactly 9:00 PM. The command is successfully received and executed by all nodes. However, the duration behavior varies strictly by hardware model:

  1. LZW30-SN: Behaves exactly as documented. The notification remains active through the night and clears after 10 hours.

  2. LZW31-SN & LZW36: The notification clears prematurely. By midnight, all dimmers and fan/light combos have reverted to their default LED state.

Our Hypothesis: Given the timeline, it appears the LZW31-SN and LZW36 firmwares are failing to apply the value - 120 hour math to the duration byte. Instead, they seem to be interpreting the 130 byte linearly as 130 minutes (2 hours and 10 minutes).

If an automation fires at 9:00 PM, a 130-minute timer expires at exactly 11:10 PM, which perfectly matches the observation that they are off when checked at midnight.

What We Have Already Ruled Out:

  • Z-Wave JS Command Syntax: We are using zwave_js.bulk_set_partial_config_parameters for the LZW31-SNs and zwave_js.set_config_parameter (with explicit value_size: 4 and value_format: 0) for the LZW30-SNs and LZW36s to account for missing partial parameter metadata in the Z-Wave JS database. The commands are verified to be arriving and activating the correct colors/effects.

  • Value Calculation: Verified the 25297152 integer multiple times via the Inovelli Switch Toolbox.

Questions:

  1. Can anyone confirm if the LZW31-SN and LZW36 firmware handles the 121-254 duration byte differently than the LZW30-SN?

  2. Is this a known bug where the hour mapping was omitted and defaults to minutes, or is there an undocumented parameter setting causing this behavior?