Open a CSV data file

This guide shows how to load a CSV file into ModbusScope for viewing on the graph.

Steps

Option A — drag and drop:

Drag the .csv file from your file explorer onto the ModbusScope main window.

Option B — menu:

  1. Go to File > Open Data File….

  2. Select the .csv file.

After opening the file with either option:

  1. ModbusScope attempts to detect the field and decimal separators automatically.

    CSV import dialog

  2. If the preview shows garbled data, adjust the separator settings manually:

    • Field separator: the character between columns (e.g. ; or ,)

    • Decimal separator: the character used for decimals (e.g. . or ,)

    • Thousand separator: the grouping character (e.g. . or )

  3. Set Timestamp unit to ms or s to match the unit in your file. ModbusScope always stores timestamps in milliseconds internally.

  4. If the file has header lines or the timestamp is not in the first column, adjust:

    • Comment string: lines starting with this string are skipped

    • Timestamp column: column index of the timestamp (1-based)

    • Label row: row number of the column headers

    • Data row: row number where data starts

  5. Click OK.

Result: The data is displayed on the graph as if it were a live logging session.

Notes

  • CSV files exported by ModbusScope open without any manual configuration.

  • For files you open repeatedly with non-standard settings, save a preset to avoid reconfiguring each time. See Create CSV presets.

See also