Modbus tools
Modbus tools for the field
Fast, free tools for technicians, integrators and home-automation users. Paste values from your meter, inverter or PLC and get an answer straight away.
Tools
- Register DecoderFloat32, Int32, UInt16 and bits in every byte order, plus Find my value.
- Address ConverterComing soon40001 ↔ offset 0, 4x/3x/0x/1x notation, 5- and 6-digit addresses.
- Value EncoderComing soonTurn a value like 230.5 into registers for every byte order.
- CRC-16 CalculatorComing soonModbus RTU checksum in wire order, plus a full frame check.
- Frame DecoderComing soonRead RTU and TCP frames from Wireshark or a serial log.
- Function & Exception CodesComing soonWhat each code means and the usual cause in practice.
- Status Word DecoderComing soonName each bit of a 16- or 32-bit status register.
- 4–20 mA ScalingComing soonRaw values to engineering units, 0–10 V and 4–20 mA with fault detection.
Why PLCBytes
- Runs in your browser. Nothing you enter leaves your device.
- No sign-up, no pop-ups.
- Loads fast on a phone with a weak signal.
- Every result comes with a short, plain explanation.