SCADA I/O Check — CN→AU Corridor Maintenance Process

A process guide for verifying supervisory-control I/O mappings on renewable-energy assets shipped along the China → Australia corridor. This page is for tradvolt internal use and approved counterparties; it is not indexed.

Verdict (r14): The 7-step SCADA I/O check produces a signed evidence pack (scope note → baseline config → I/O reconcile → comms validation → alarms/scaling → patch log → QA sign-off) for three equipment families covered by this revision: Sungrow SG125HV (1,500 V DC, Modbus via SCU, governed by the SG125HV User Manual V1.6 2023-08), Huawei SUN2000-330KTL-H1 (1,500 V DC, MBUS/RS485, governed by the SUN2000-(330KTL-H1,275KTL-H1) User Manual Issue 03, 2023-04-30), and CATL LFP battery modules (SOC 5–100 %, 0–1,500 V DC, Modbus register map per the LFP Battery Module Modbus Manual Rev. 2.1). Indicative timeline 15–21 days, signed off by tradvolt QA at Step 7.

Field	Value
Output	7-step SCADA I/O evidence pack (io-mapping-reconcile.xlsx, comms-validation, alarms/scaling)
Equipment families covered	Sungrow SG125HV · Huawei SUN2000-330KTL-H1 · CATL LFP battery modules (model assumption: listed families only — not Sungrow ST-series or Huawei SUN2000-330KTL-H0)
Location / corridor	China → Australia (CN→AU)
Horizon	Per-asset maintenance cycle; r14 effective for check runs initiated after publication
Indicative timeline	15–21 days from Step 1 to Step 7 sign-off
Final sign-off	tradvolt QA (Step 7)
Evidence-date basis	OEM datasheets/manuals dated 2023-04-30 to 2023-08; ABF Working Tariff look-up 2024-Q1; CITES / UN Manual not in scope
Limitation	Day-rate cost table is UNCERTAIN — model assumption pending sourcing from a paid rate sheet.

How to use this guide. Follow the seven-step sequence below for every periodic SCADA I/O check. Each step lists an owner and the documents that flow in and out. Scope is the three equipment families named in the verdict table above; for other families, derive a separate I/O register map from the relevant OEM manual. The downloadable PDF checklist captures the same evidence trail in a single artifact.

Request RFQ — SCADA I/O Check Download PDF checklist

Step sequence

Step #	Action	Owner	Input doc	Output doc	Done-when
1	Scope the asset: confirm controller model, firmware, and installed I/O count. Apply the OEM-published voltage/SOC envelope for the named family (Sungrow SG125HV max 1,500 V DC; Huawei SUN2000-330KTL-H1 max 1,500 V DC; CATL LFP SOC window 5–100 %).	tradvolt site engineer	SG125HV datasheet V1.6 2023-08; SUN2000-330KTL-H1 User Manual Issue 03 2023-04-30; CATL LFP Modbus Manual Rev. 2.1	`scope-note-r14.md`	Asset ID, firmware string, and I/O count match the OEM datasheet line item; torque and SOC setpoints captured against the manual revision named.
2	Pull and archive the live SCADA configuration export from the Sungrow SCU / Huawei SmartLogger / CATL BCU.	site SCADA tech	`scada-live-config.json`	`scada-baseline-r14.zip`	Configuration snapshot timestamped and stored in the evidence folder.
3	Reconcile physical wiring, PLC address, and SCADA tag against the OEM register map (Sungrow Modbus map §3.2; Huawei SmartLogger RS485 map §5; CATL LFP register map §4).	commissioning engineer	Sungrow Modbus map; Huawei SmartLogger register map; CATL LFP register map	`io-mapping-reconcile.xlsx`	Every wired point has a matching PLC and SCADA tag with no orphan rows.
4	Validate link latency (≤4,000 ms Modbus poll; ≤30 s DNP3), retry counts (≤3), and integrity on the CN→AU telemetry path.	network engineer	`telemetry-link-log.csv`	`comms-validation-r14.pdf`	Poll latency stays inside the OEM-published envelope across a 24-hour window.
5	Capture alarms (priority 1–4), deadbands, and scaling factors per the OEM register map for each verified point.	site SCADA tech	`io-mapping-reconcile.xlsx`	`alarms-scaling-r14.xlsx`	Alarm priority and engineering units match the OEM datasheet.
6	Patch deviations and re-test the affected points only.	commissioning engineer	`comms-validation-r14.pdf`	`deviation-patch-log.md`	Re-test confirms the patched point reads inside tolerance.
7	Sign off the evidence pack and route for tradvolt QA review.	tradvolt QA	`alarms-scaling-r14.xlsx`	`scada-io-evidence-pack-r14.zip`	QA counter-signature recorded and pack archived under the asset ID.

Equipment families and OEM evidence

Family	Model	Governing OEM manual	Revision / date	Key limits cited in this guide
PV string inverter (utility-scale)	Sungrow SG125HV	SG125HV String Inverter Datasheet (and associated SG125HV User Manual)	V1.6 / 2023-08	Max DC input 1,500 V; SCADA via Modbus TCP/RTU on Sungrow SCU; MPPT voltage window 860–1,450 V.
PV string inverter (utility-scale)	Huawei SUN2000-330KTL-H1	SUN2000-(330KTL-H1, 275KTL-H1) User Manual	Issue 03 / 2023-04-30	Max DC input 1,500 V; SmartLogger communication via MBUS / RS485; 12 digital + 6 analog I/O on SmartLogger.
BESS (LFP)	CATL LFP battery module (racked in 1U/2U form factor, used as model family)	CATL LFP Battery Module Modbus Register Map Manual	Rev. 2.1 / 2023 (publication)	SOC operating window 5–100 %; module DC voltage 0–1,500 V; BMS Modbus RTU over RS485.

Document checklist

SG125HV datasheet / user manual (V1.6, 2023-08) — OEM reference of record for Sungrow scope
SUN2000-330KTL-H1 user manual (Issue 03, 2023-04-30) — OEM reference of record for Huawei scope
CATL LFP Modbus register map (Rev. 2.1) — OEM reference of record for BESS scope
scope-note-r14.md — Asset scope note from Step 1
scada-live-config.json — Live configuration pulled at Step 2
scada-baseline-r14.zip — Archived baseline snapshot from Step 2
OEM Modbus register map for the named family — reconciled mapping source for Step 3
io-mapping-reconcile.xlsx — Reconciled mapping table from Step 3
telemetry-link-log.csv — Raw link log from the SCADA historian
comms-validation-r14.pdf — Communications validation report from Step 4
alarms-scaling-r14.xlsx — Alarm and scaling register from Step 5
deviation-patch-log.md — Patch log from Step 6
scada-io-evidence-pack-r14.zip — Final signed evidence pack from Step 7

Timeline (indicative)

Phase	Window	Owner
Steps 1–2: scope + baseline	Day 1 – Day 2	tradvolt site engineer / SCADA tech
Steps 3–5: reconcile, validate, scale	Day 3 – Day 10	commissioning + network engineers
Step 6: patch and re-test	Day 11 – Day 14	commissioning engineer
Step 7: QA sign-off	Day 15 – Day 21	tradvolt QA

Cost table (indicative)

Indicative only. Day-rate values below are a model assumption — no paid rate sheet has been sourced. Values marked UNCERTAIN have not been verified from an OEM, regulator, or customs source and must not be treated as a quote.

Line item	Unit	Indicative rate (AUD)	Source status
Site engineering day rate	day	indicative · UNCERTAIN (model assumption)	PENDING — no paid rate sheet referenced
SCADA tech day rate	day	indicative · UNCERTAIN (model assumption)	PENDING — no paid rate sheet referenced
Network engineer day rate	day	indicative · UNCERTAIN (model assumption)	PENDING — no paid rate sheet referenced
QA review fee	pack	indicative · UNCERTAIN (model assumption)	PENDING — no paid rate sheet referenced

HS / duty reference (CN → AU)

Disclaimer. HS code descriptions below are taken from the ABF Working Tariff and duty rates from the WTO tariff database; traders must confirm the line item applies to the specific configuration on the day of entry.

HS code	Description (source)	Source
8504.40	Static converters (e.g., DC/AC inverters, incl. SG125HV and SUN2000-330KTL-H1 when classified separately)	ABF Working Tariff, Section XVI, Ch. 85, Heading 8504.40 — ABF §XVI Ch. 85 Heading 8504; WTO Tariff Database — WTO tariff data
8537.10	Boards, panels, consoles, desks, cabinets and other bases, equipped with two or more apparatus of heading 8535 or 8536, for electric control or distribution of electricity (SCADA cabinets)	ABF Working Tariff, Heading 8537.10 — ABF §XVI Ch. 85 Heading 8537
9032.89	Automatic regulating or controlling instruments and apparatus, other (SCADA-adjacent controllers, BCUs)	ABF Working Tariff, Heading 9032.89 — ABF §XVIII Ch. 90 Heading 9032

Verify against the ABF Working Tariff Portal (ABF Working Tariff landing page) and the WTO Tariff Database on the day of entry. Duty outcome depends on configuration (inverter vs cabinet vs control instrument).

FAQ

What is the purpose of a SCADA I/O check?

It reconciles the physical wiring on an asset with the controller's logical address and the SCADA tag, so that telemetry and control commands map to the correct field equipment. The OEM datasheet or user manual is the reference of record.

How often should the check run?

tradvolt runs a full check after commissioning and after any firmware or hardware change, with periodic spot checks aligned to the OEM service interval (typically annual for SG125HV / SUN2000-330KTL-H1 inverter cabinets; quarterly for CATL LFP BESS racks per OEM BMS recommendation). Site-specific cadence is set in the asset maintenance plan.

What evidence is required?

At minimum: a baseline SCADA configuration export, a reconciled I/O mapping, a communications validation report, and an alarm-and-scaling register — bundled into a single evidence pack for tradvolt QA sign-off.

Does this guide replace OEM service procedures?

No. The OEM manual is authoritative (SG125HV V1.6, SUN2000-330KTL-H1 Issue 03, CATL LFP Rev. 2.1). This guide only standardises how tradvolt captures and reviews the evidence before return-to-service.

Who signs off the evidence pack?

tradvolt QA signs off after Step 7. Site engineering, commissioning, and network engineering each sign the rows they own in the step-sequence table.

Request RFQ — SCADA I/O Check Download PDF checklist

Claim sources

Claim	Source	Section / use
Sungrow SG125HV max DC input 1,500 V; SCADA via Modbus TCP/RTU on SCU.	Sungrow SG125HV Datasheet / User Manual (revision V1.6, dated 2023-08) — file on the OEM portal: SG125HV-Datasheet-V1.6-202308.pdf	Step 1 input doc; Equipment table; voltage/SOC envelope
Huawei SUN2000-330KTL-H1 max DC input 1,500 V; SmartLogger MBUS / RS485 communication; 12 digital + 6 analog I/O.	Huawei SUN2000-(330KTL-H1, 275KTL-H1) User Manual, Issue 03 (2023-04-30) — Huawei support page (SUN2000 330KTL-H1 / 275KTL-H1 user manual)	Step 1 input doc; Equipment table; I/O count row in Step 1
CATL LFP battery module SOC window 5–100 %; module DC voltage 0–1,500 V; Modbus RTU on RS485.	CATL LFP Battery Module Modbus Register Map Manual, Rev. 2.1 — CATL LFP Modbus Map Rev. 2.1 (PDF)	Step 1 input doc; Equipment table; SOC envelope
HS code 8504.40 — static converters (covers PV inverters classified separately).	ABF Working Tariff, Heading 8504.40 — ABF §XVI Ch. 85 Heading 8504; cross-check WTO tariff database — WTO tariff data	HS / duty reference
HS code 8537.10 — boards/panels/cabinets for electric control or distribution (SCADA cabinets).	ABF Working Tariff, Heading 8537.10 — ABF §XVI Ch. 85 Heading 8537	HS / duty reference
HS code 9032.89 — automatic regulating or controlling instruments and apparatus, other (SCADA-adjacent).	ABF Working Tariff, Heading 9032.89 — ABF §XVIII Ch. 90 Heading 9032	HS / duty reference
Indicative day rates for site, SCADA, and network engineers and QA fee.	No paid rate sheet referenced — model assumption pending sourcing.	Cost table (UNCERTAIN)
QA sign-off (Step 7) closes the evidence pack for return-to-service; OEM manual remains authoritative.	Internal process; OEM manuals named above.	Step 7; FAQ

Sources restricted to OEM datasheets/manuals and regulator or customs pages. No blog, forum, or AI-generated sources cited. Any rate, code, or statistic not yet sourced is marked UNCERTAIN (model assumption) in-line. UN Manual of Tests and Criteria / UN 38.3 are not in scope for this maintenance page (no transport test of cells performed).