Screen Brightness Issue on White TRCs

[StephenYang]

Issue

The first batch of White TRCs (produced in 24H1) could appear too bright in some low-light level situations. All future batches (post 24H1) do not have the issue. See the precise list of affected serial numbers in the appendix section below.

Product Line

EcoStruxure Building Operation

Environment

SpaceLogic Touchscreen Room Controller

Cause

The housing color is set in the device’s manufacturing configuration to tell it what color the screen bezel is (black or white). White TRCs produced with an incorrect housing color will read a higher value for light level. This has a direct impact on the backlight dimming levels, and the only effect will be the screen staying brighter in dark rooms.

Resolution

Customers experiencing brightness issues may simply adjust the backlight brightness parameters to a lower value, which are configurable in the TRC configuration screens and via BACnet/Modbus. This would reduce the overall brightness of the devices immediately, without fixing the housing color. We recommend going with a permanent fix, by setting the housing color via the USB port. The steps to fix this permanently would be:

• Connect USB-C cable to TRC
• Log in as an administrator into the TRC’s configuration screens (to enable USB connection)
• Open a terminal app like hyperterm or putty, with settings:
  • Speed (baud): 115200bps
  • Data bits: 8
  • Stop bits: 1
  • Parity: None
• Paste in the command: #001000061009FE00009C!
  • Device responds: #000E00071009FE0051!
• To confirm or test, paste in the command: #000C00001009FEE8!
  • Device responds:
    • White housing: #001200011009FE000000F9!
    • Black housing: #001200011009FE000001FA!

Examples

Below is an example of 4 white TRCs:

• The two (2) outermost devices are too bright (leftmost and rightmost white TRCs).
• The two (2) devices in the middle have been corrected to show adequate brightness.

Appendix

Since the Touch Room Controller’s serial number includes the date code, knowing whether a unit is impacted is very straightforward.

1. Follow these instructions to determine if the unit of interest is impacted:
   Retrieve the serial number from the unit you suspect has the incorrect housing color.
   1. Example: FL24075TRC00002
2. Examine the serial number date code, wrapped between the “FL” and “TRC” substrings.
   1. Example: 24075
3. Decrypt the date code, using this logic:
   1. 24: year 2024
   2. 07: week 07 of 2024
   3. 5: day 5 of week 7 of 2024
4. If the date code is between the values 24074 and 24285, the product is impacted. Products outside of this date code range are not impacted, and no fix to housing color will be needed.