System Maintenance Notice for T&D WebStorage Service (Completed)
(Updated: January 22, 2026)
Scheduled Maintenance has been completed successfully and now the service is available as usual.
Actual Maintenance Time: January 22, 2026 1:00 - 2:23 (UTC+0)
(Updated: December 24, 2025)
Please note that the originally scheduled maintenance for December 23 has been postponed to January 22, 2026, due to an issue with the implementation procedure.
We apologize for the delayed notice and appreciate your understanding.
New Schedule
Date: December 23, 2025 → January 22, 2026
Time: 1:00 – 2:00 (UTC)
*The end time is subject to change.
(The rest of the announcement remains unchanged.)
Affected Products/Apps
Access to the T&D WebStorage Service will be unavailable from the following products/apps and browsers.
Affected Devices
TR7A2 Series, TR7A Series
TR-7nw/wb/wf Series
TR4A Series, TR4 Series, TR32B
RTR500BW, RTR500BM (HTTPS)
RTR500BW, RTR500BM (FTP)
RTR500BC, RTR-500
RTR-500NW/AW, RTR-500MBS-A/GSM
TR-701NW/AW, TR-702NW/AW
Affected Applications
T&D Thermo
T&D 500B Utility
ThermoREC
ThermoStorage
T&D Graph
RTR500BC for Windows
T&D WebStorage Viewer
Details by Products
TR7A2 Series, TR7A Series
[Recorded Data]
Unsent data will be transmitted upon the first successful connection after maintenance.
Device Logging Capacity: Up to 30,000 readings
[Warning Data]
Up to 5 unsent warnings (2 for battery) will be sent after maintenance.
*If transmission fails, the data will be sent again at the next scheduled auto-upload.
TR-7nw/wb/wf Series
[Recorded Data]
Unsent data will be transmitted upon the first successful connection after maintenance.
Device Logging Capacity: Up to 8,000 readings
[Warning Data]
The most recent unsent warning will be sent after maintenance.
*If transmission fails, the data will be sent again at the next scheduled auto-upload.
TR4A Series, TR4 Series, TR32B
[Recorded Data sent from App]
During the maintenance period, data downloaded from the device to the mobile app cannot be uploaded to the T&D WebStorage Service. However, any unsent data will be automatically transmitted when the app is launched after maintenance.
Device Logging Capacity:
Up to 16,000 readings - TR41A/42A/45, TR41/42
Up to 8,000 readings - TR43A, TR32B
RTR500BW/BM (HTTPS)
[Current Readings Data]
Up to 10 current readings (including the latest value obtained at the first successful connection after maintenance) will be sent. Other unsent current readings will be lost.
[Recorded Data Files (TRZ/PRZ)]
Unsent recorded data files will be sent at the next scheduled transmission after maintenance.
Device Logging Capacity:
Up to 16,000 readings - RTR501B/502B/505B, RTR-501/502/505
Up to 8,000 readings - RTR503B/507B, RTR-574/576, RTR-503/507
*If recorded data transmission fails, the device will retry once after 30 minutes (only when the transmission interval is set to 60 minutes or more).
[Warning Data]
The most recent unsent warning will be sent after maintenance. This includes the latest status of each warning type (upper/lower limit, battery, sensor error, communication error, etc.).
RTR500BW/BM (FTP), RTR500BC
RTR-500NW/AW, RTR-500MBS-A/GSM, RTR-500
TR-701NW/AW, TR-702NW/AW
[Current Readings Data]
Current readings transmitted during maintenance will not be received and will be lost.
[Recorded Data]
Unsent recorded data will be sent at the next scheduled transmission after maintenance.
Device Logging Capacity:
Up to 16,000 readings - RTR501B/502B/505B, RTR-501/502/505
Up to 8,000 readings - RTR503B/507B, RTR-574/576, RTR-503/507, TR-701NW/AW, TR-702NW/AW
*If recorded data transmission fails, RTR500BW/BM will retry once after 30 minutes (only when the transmission interval is set to 60 minutes or more).
*If recorded data transmission fails, the TR-700NW Series will retry up to two times at 10-minute intervals.