Data Logging with SD Card on IDEC FC6A in WindLDR

Quick Answer

FC6A CPU variants with an SD card slot support onboard data logging. WindLDR's data log configuration allows you to select registers, set the logging trigger (periodic, on-change, or on-event), and define the CSV file format written to the SD card with timestamps from the built-in RTC.

Hardware Requirements

Not all FC6A CPU variants include an SD card slot — verify your model supports data logging. Use an industrial-grade SD card (Class 10 or higher, up to 32 GB SDHC) formatted as FAT32.

Enabling Data Logging

In WindLDR, navigate to Function Area Settings → Data Log. Enable data logging and configure:

• Logging trigger — Periodic (time interval), on-change (value change exceeds deadband), or on-event (triggered by M relay)
• Registers to log — Select up to the maximum number of R registers per log entry
• Logging interval — For periodic logging (e.g., every 15 minutes, every hour)
• File naming — Date-based file naming for automatic daily/weekly file rotation

Timestamp and RTC

The FC6A's built-in real-time clock (battery-backed) provides timestamps for each log entry. Clock accuracy is approximately ±30 seconds per month. Synchronize the RTC via WindLDR or NTP server (Ethernet-equipped models).

Retrieving Data

• Physical removal — Remove the SD card and read CSV files on a PC
• FTP — Ethernet-equipped FC6A models support FTP access to the SD card over the network

Example: Tank Level Logging

Log R100 (tank level in gallons), R102 (pump runtime hours), and R104 (daily inflow volume) every 15 minutes. CSV output includes timestamp, R100, R102, R104 per row. Import to Excel for trending and regulatory reporting.