ABB ACH580 Modbus register map

Sources and notes

• ACH580 HVAC control program firmware manual · version 3AXD50000027537 revision J, 2026-02-23
  chapter Modbus RTU control through the embedded fieldbus interface (EFB), chapter Parameters and Additional parameter data

Source: ABB, "ACH580 HVAC control program firmware manual", 3AXD50000027537 revision J (2026-02-23); https://library.abb.com/d/3AXD50000027537

• Embedded fieldbus (terminals on the control unit), 58.01 Protocol enable = Modbus RTU. Defaults: node address 1, 19.2 kbit/s, 8 even 1.
• Addresses are 1-based register numbers (400001 = 1). Parameters use 58.33 Addressing mode = Mode 0, the default.
• Real-type parameters are read as 32-bit values (register 420000 + 200 × group + 2 × index) with the FbEq32 scaling of the chapter Additional parameter data; their 16-bit copies at 400000 + 100 × group + index use the FbEq16 scalings of the Parameters chapter (several depend on group 46) and are not in this map.
• 32-bit values use 58.34 Word order = LO-HI (the default): low word first.
• Lists, sources (Analog src, Binary src), packed Boolean words (PB) and data parameters are read as 16-bit values (400000 + 100 × group + index). Bits of packed Boolean words are listed where the manual names them; reserved bits are left out.
• Parameters with an index above 99 (for example 01.102 Line current of the ACH580-31 and -34, or 58.101 Data I/O 1) are only reachable with addressing mode 1 or 2 and are not in this map.
• Date, time and duration parameters (for example 34.12 Timer 1 start time, 34.72 Exception 1 start) have no FbEq16 or FbEq32 scaling in the manual (shown as a dash) and are not in this map.
• 23.33, 40.41, 40.42, 41.41, 41.42 and 83.04 are listed in the chapter Additional parameter data but their entries are missing from the parameter listing; they have no default or selection labels here. 47.05-47.08 and 47.25-47.28 are in the parameter listing but missing from the additional data and are taken to have the type and scaling of their neighbours (47.04, 47.24).
• Some units depend on settings: power in kW or hp and torque in N·m or lb·ft (96.16), temperatures in °C or °F, analog values in mA or V, process values in the PID units of group 40. Where the unit is not fixed it is given in the description.
• Registers 1-14 carry the data selected by 58.101-58.114; the defaults are shown. Coils and discrete inputs follow the ABB Drives profile (58.25 = ABB Drives); coils 9 and 10 (jogging) are not used by the ACH580.
• Parameters without a default value in the manual (actual signals, status words) are read-only; the others are writable within the range given by write_min and write_max. Defaults that differ between 50 Hz and 60 Hz supply (95.20 bit 0) are shown as written in the manual.
• 96.78 appears twice in the manual (550 Compatibility mode, a list 0...2, and Legacy Modbus mapping, disable/enable) with different selections and is not in this map.
• Parameters of the ACH580-31 and ACH580-34 supply unit (groups 94 and others marked as only visible for those types) appear only where their index is 99 or lower.