Lenze i550 inverter
Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based
as on the wire. Word order and scaling are confirmed at the hardware-verified rung and at no rung below it.
interop-verified
Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
| point | address (0-based) | type | scale | unit |
|---|
| output_frequency | 1000 | I16 | 0.1 | |
| actual_current | 1030 | U16 | 0.1 | |
| motor_voltage | 1060 | U16 | 1 | |
| dc_bus_voltage | 1050 | U16 | 1 | |
| heatsink_temperature | 1171 | I16 | 0.1 | |
| error_code | 1500 | U16 | 1 | |
link settings as documented (unverified): RTU/TCP; For Modbus RTU, the baud rate and parity are detected automatically when DIP switches are in the OFF position. Otherwise, node address and baud rate can be set via DIP switches or parameters P510.01 and P510.02.
⚠ Improper installation of the safety engineering system can cause an uncontrolled starting action of the drives. — Starkest reads only; we never write a control register.
bench facts as documented (unverified)
| terminals | Spring terminal, pluggable |
| termination | DIP switch 'R' to ON at the first and last physical node |
| connector | X216 |
| wiring notes | Max. cable cross-section: 2.5 mm², Stripping length: 10 mm, Required tool: 0.4 x 2.5 screwdriver |
| power | 0.25 ... 132 kW, 1-phase 120 V (90 V ... 132 V, 45 Hz ... 65 Hz), 1-phase 230/240 V, 3-phase 230/240 V, 3-phase 400 V, 3-phase 480 V |
| certifications | Low-Voltage Directive 2014/35/EU, EN IEC 61800-5-1, UL 61800-5-1, CAN/CSA C22.2 No.274, EMC Directive 2014/30/EU, EN IEC 61800-3 |
| doc revision | 01/2023 · EN |
field reports — community-sourced, unverified (checked 2026-06-11)
- Users attempting to integrate the Lenze i550 via Modbus RTU often encounter communication failures (such as warning code W81a2 'Modbus: incorrect request by master' or exception code 8602) due to address offset confusion. The device requires a -1 offset from the documented register number when using native Modbus PDU addressing. [source]
- confirmed: For Modbus RTU, the baud rate and parity are detected automatically when DIP switches are in the OFF position. Otherwise, node address and baud rate can be set via DIP switches or parameters P510.01 and P510.02. — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Connector X216, spring terminal, pluggable, max cable cross-section 2.5 mm², stripping length 10 mm, required tool 0.4 x 2.5 screwdriver, termination DIP switch 'R' to ON — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Power range 0.25 ... 132 kW, 1-phase 120 V, 1-phase 230/240 V, 3-phase 230/240 V, 3-phase 400 V, 3-phase 480 V — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Register map: output_frequency @ 1000, actual_current @ 1030, motor_voltage @ 1060, dc_bus_voltage @ 1050, heatsink_temperature @ 1171, error_code @ 1500 — confirmed by Lenze parameter-to-Modbus mapping formula: Register = (Parameter * 10) + Subindex (e.g., P100.00 = 1000, P117.01 = 1171)
The trust ladder
Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.
- generated — A prompt produced it. Unproven — anyone can regenerate this.
- structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
- interop-verified — Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
- simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
- hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.