: Programming "All-in-One" units that combine HMI (Human Machine Interface) and PLC logic into a single hardware footprint. Retrofitting
| Error Code | Message | Solution | | :--- | :--- | :--- | | | "Can not communicate with PLC" | Check your COM port in Transfer Setup. Loopback test with a paperclip on pins 2 & 3 of RS-232. | | E202 | "Device is out of range" | You used a timer address beyond the PLC's capability (e.g., T255 on an FX2N). Check the PLC parameters for max timers. | | E4001 | "Comment write error" | The comment file is corrupted. Go to Project > Save as and uncheck "Save comments as separate file." | | Install Failure | "Setup cannot find the environment" | You forgot to run EnvMEL\Setup.exe first. Uninstall, reboot, re-run Env first. | | Windows 10 Hang | Software freezes on "Starting MELSOFT" | Run C:\MELSEC\Gppw\GxDeveloper.exe as Administrator. Set compatibility to Windows 7. | gx developer 8.86
This version provides a comprehensive suite for programming, debugging, and maintaining industrial automation systems. : Programming "All-in-One" units that combine HMI (Human
The A-series (Ans series) is now largely obsolete, but thousands of machines running A-series PLCs are still in operation. GX Developer 8.86 is one of the last stable versions that supports the A-series natively without requiring convoluted compatibility packs. This makes it an invaluable tool for maintenance engineers tasked with keeping 20-year-old machinery running. | | E202 | "Device is out of
The FX family—ranging from the older FX1S and FX1N to the FX3U and FX3G—is the most popular compact PLC in history. GX Developer 8.86 handles these units effortlessly. It includes specific instructions unique to the FX platform (such as high-speed counting and positioning instructions) that were essential for packaging and assembly machines.
If you are programming a new FX or L series PLC , buy GX Works 2 or 3 instead—they are infinitely better. But if you are stuck supporting an old A-series or early Q-series machine that a plant manager refuses to upgrade, GX Developer 8.86 is ugly, clunky, and absolutely necessary. Keep a dedicated old laptop just for it.