Uploading, Downloading, and Monitoring IDEC FC6A Programs in WindLDR

Quick Answer

WindLDR supports downloading programs to the FC6A (PC → PLC), uploading existing programs for backup (PLC → PC), online monitoring of live values, and force functions for commissioning. Online editing allows modifying a running program with caution.

Download vs Upload

• Download — Transfer a program from WindLDR (PC) to the FC6A PLC. This overwrites the current program in the controller.
• Upload — Retrieve the program currently stored in the FC6A and open it in WindLDR for viewing, editing, or backup.

Pre-Download Checklist

1. Verify the project CPU type matches the physical FC6A model
2. Verify firmware compatibility
3. Verify I/O configuration matches installed expansion modules
4. Compile the project and resolve any errors

Downloading via USB or Ethernet

Connect to the FC6A, select Communication → Download, confirm the overwrite dialog, and wait for the transfer to complete. The FC6A will restart in the configured mode (RUN or STOP).

Program Protection

WindLDR supports password-protecting projects to prevent unauthorized upload or modification. Set a password in Project Settings before downloading.

Online Monitoring

In monitor mode, WindLDR displays live contact states (highlighted when ON), coil states, timer/counter accumulated values, and R register values directly on the ladder rungs. This is the primary debugging tool for commissioning.

Force Function

Force individual I, Q, or M bits to ON or OFF regardless of program logic. Forces are indicated visually and persist until removed. Use forces carefully — forced outputs bypass all safety interlocks in the program.

Online Editing

WindLDR supports modifying a running program. After making changes, confirm the edit — the FC6A briefly interrupts the scan to accept the changes. Use online editing cautiously in production environments.