Easy ModbusManufacturer
Wilo Modbus register maps
Updated 25 October 2026
2 Wilo models, 84 registers in all, each re-typed from Wilo’s own free documentation and checked against it.
2 of 2 shown
- Pump (high-efficiency circulator)
Wilo Para MAXO (built-in Modbus RTU)
Wilo-Para MAXO OEM circulators with the built-in Modbus RTU interface (module versions 1.00-99.99).
Also known as: Para MAXO, Wilo-Para MAXO, Para MAXO Modbus - Pump (smart circulator)
Wilo Stratos MAXO with CIF module Modbus RTU
Wilo-Stratos MAXO single and twin-head circulators fitted with the plug-in CIF module Modbus RTU (article 2190368, UL 2237080), module firmware 1.00-99.99; some registers need a newer module version as noted.
Also known as: Wilo-Stratos MAXO, Stratos MAXO-D, Stratos MAXO-Z, CIF-Module Modbus RTU, CIF Modbus RTU 2190368, CIF Modbus RTU UL 2237080
Wilo: default communication settings
Factory defaults as the manufacturer documents them. Change one setting at a time on site and write down what you changed. Word order applies to 32-bit values; the addressing column says how the manufacturer prints register numbers (every map on this site also gives the 0-based wire address).
| Model | Transport | Unit ID | Serial | Word order | Documented addressing | Registers |
|---|---|---|---|---|---|---|
| Para MAXO (built-in Modbus RTU) | RTU | 101 | 19200 baud, 8E1 | 16-bit only | 0-based | 28 |
| Stratos MAXO with CIF module Modbus RTU | RTU | Not stated | - | ABCD | 0-based | 56 |