Create CSV parse presets

This guide shows how to create a presets.json file so that ModbusScope automatically applies the right parse settings when opening certain CSV files.

Steps

  1. Create a file named presets.json and place it in one of these locations:

    • C:\Users\<USER>\Documents\ModbusScope\presets.json (Windows, checked first)

    • Same folder as the ModbusScope executable (fallback)

  2. Write your presets using this structure:

    {
  "presets": [
    {
      "name": "My preset",
      "keyword": "-mydevice",
      "fieldseparator": ";",
      "decimalseparator": ",",
      "thousandseparator": " ",
      "commentsequence": "//",
      "column": 1,
      "labelrow": 1,
      "datarow": 2
    }
  ]
}

  3. Adjust the values to match your file format. See Reference: Preset file format for all available fields.

  4. Save the file and reopen ModbusScope (or open a CSV file — presets are loaded when the import dialog opens).

Result: When you open a CSV file whose name contains the keyword (e.g. a file named log-mydevice.csv), the matching preset is selected automatically. If no keyword matches, you can pick a preset from the dropdown in the import dialog.

Notes

  • If a valid preset file is found, it replaces the built-in presets entirely.

  • A preset can omit keyword if you always want to select it manually.

  • Timestamps in seconds: set "timeinmilliseconds": false to have ModbusScope convert them on load.

  • Existing presets.xml files continue to work without changes. See Reference: Preset file format — backward compatibility.

See also