1. Home
2. Modbus register maps
3. Buderus

Manufacturer

Buderus Modbus register maps

Updated 29 October 2026

2 Buderus models, 159 registers in all, each re-typed from Buderus’s own free documentation and checked against it.

• Boiler / heating system controller

  Buderus Logamatic 5000 boiler and system controller (Modbus TCP, datapoint list 4.0)

  Buderus Logamatic 5313 and 5311 (and the Bosch Control 8313/8311 equivalents) acting as master, firmware 1.3 or later with the 4.0 datapoint list; addresses for slave controllers differ.

  109 registers · 26 writable · TCP
  Also known as: Logamatic 5313, Logamatic 5311, Bosch Control 8313, Bosch Control 8311, Control 8000, BCT 531, Logamatic 5000 Modbus
• Boiler

  Buderus SSB condensing boilers (built-in Modbus RTU)

  Buderus SSB series condensing boilers (Bosch Thermotechnology, North America) using the Modbus terminals on the boiler's internal terminal strip, per installation instructions 6720818450 (2015/10).

  50 registers · 10 writable · RTU
  Also known as: SSB, Buderus SSB boiler, Bosch SSB, 6720818450

Buderus: 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).