Teltonika RUT200 / RUT241 Modbus register map

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Sources and notes

• RUT200 Modbus (Teltonika Networks Wiki)
  Modbus Registers: get and set parameter tables; identical register tables to the RUT241 page, retrieved 2026-10-18
• RUT241 Modbus (Teltonika Networks Wiki) · version wiki revision 144664
  Modbus Registers: get and set parameter tables

Source: Teltonika Networks Wiki, "RUT200 Modbus"; https://wiki.teltonika-networks.com/view/RUT200_Modbus; Teltonika Networks Wiki, "RUT241 Modbus"; https://wiki.teltonika-networks.com/view/RUT241_Modbus

• Teltonika RUT200 and RUT241 LTE routers: the Modbus TCP server and the serial Modbus server both answer with the same system values. The registers are holding registers (function 3 to read, 6 and 16 to write).
• The manual lists a register address (0-based, as sent on the bus) and a register number (address + 1). This map uses the address.
• Text values take 2 characters per register. Numbers take 2 registers; the manual gives no word order, so big is assumed.
• Mobile data counters are in bytes, kilobytes or megabytes, as chosen by the Mobile data type setting of the Modbus server.
• The server is off by default. Factory settings: TCP port 502, device ID 1 (0 answers to any ID), serial 9600 baud, 8 data bits, no parity, 1 stop bit.
• With 'Enable custom register block' on, registers from 1025 onward are a user-defined block that is not in this map.
• Left out because the manual is not clear: Mobile data received last month (SIM1), Mobile data sent last month (SIM1), Mobile data received last week (SIM1), Mobile data sent last week (SIM1), Change APN (length not fixed).
• Teltonika RUT241 LTE router: the Modbus TCP server and the serial Modbus server both answer with the same system values. The registers are holding registers (function 3 to read, 6 and 16 to write).