S310 Maintenance mode

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S310 is the status code for Maintenance mode.¹² It is used in wind turbine lockout/tagout and SCADA status logs.^{134567891011121314}

Facts

• The isolation sequence starts by informing the control room and setting the turbine to maintenance mode, status S310.¹
• The last person checks that tools are removed and guards are fitted before the turbine leaves maintenance mode.²
• WTG-09 had A3210 Generator brush wear limit reached raised on 2026-07-16 and cleared on 2026-07-18; WTG-09 was also in S310 Maintenance mode on 2026-07-18 from 07:58:12 to 11:52:40.³⁴⁵⁶
• WTG-04 entered S310 Maintenance mode on 2026-08-07, raised and cleared A1001 Emergency stop activated during that maintenance period, and then ended S310.⁷⁸⁹¹⁰
• WTG-02 and WTG-05 entered S310 Maintenance mode on 2026-08-25 in the morning, and both maintenance mode intervals ended later the same day.^11121314

Timeline

• 2026-07-16: WTG-09 had A3210 Generator brush wear limit reached raised on 2026-07-16 and cleared on 2026-07-18; WTG-09 was also in S310 Maintenance mode on 2026-07-18 from 07:58:12 to 11:52:40.³⁴⁵⁶
• 2026-08-07: WTG-04 entered S310 Maintenance mode on 2026-08-07, raised and cleared A1001 Emergency stop activated during that maintenance period, and then ended S310.⁷⁸⁹¹⁰
• 2026-08-25: WTG-02 and WTG-05 entered S310 Maintenance mode on 2026-08-25 in the morning, and both maintenance mode intervals ended later the same day.^11121314

Documents

• SOP-LOTO-001 Rev. C - Lockout/tagout of wind turbines
• SCADA alarm and status log, 2026-04-01 to 2026-08-31

Related

• Topics: Cold-climate operation and icing, Environmental permit and night curtailment, Gearbox lubrication and oil changes, Gearbox temperature, vibration and oil analysis, Generator brushes and electrical systems, Grid connection and grid operator instructions, Safety, isolation and work at height

Sources

Footnotes

1. SOP-LOTO-001 Rev. C - Lockout/tagout of wind turbines — ¶ 15 · ✓ quote verified ↩ ↩² ↩³

2. SOP-LOTO-001 Rev. C - Lockout/tagout of wind turbines — ¶ 24 · ✓ quote verified ↩ ↩²

3. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1281 · table ↩ ↩² ↩³

4. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1317 · table ↩ ↩² ↩³

5. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1313 · table ↩ ↩² ↩³

6. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1318 · table ↩ ↩² ↩³

7. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1548 · table ↩ ↩² ↩³

8. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1549 · table ↩ ↩² ↩³

9. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1550 · table ↩ ↩² ↩³

10. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1551 · table ↩ ↩² ↩³

11. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1850 · table ↩ ↩² ↩³

12. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1851 · table ↩ ↩² ↩³

13. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1856 · table ↩ ↩² ↩³

14. SCADA alarm and status log, 2026-04-01 to 2026-08-31 — row 1857 · table ↩ ↩² ↩³

Provenance badges✓ quote verified the quoted words were found verbatim in the source texttable values parsed deterministically from the cited table rows