Unlock Mitsubishi Q Series PLC Password Over Ethernet
Recover the password on a Mitsubishi MELSEC Q series PLC reachable over Ethernet, using the same MC Protocol / SLMP communication Mitsubishi's own engineering tools rely on to talk to the CPU — no need to open the panel or connect a programming cable directly to the PLC. If you'd rather have it handled, I provide manual Mitsubishi recovery support — done personally, with nothing sold or downloaded from this site.
What this walkthrough covers
- Q series CPU password recovery over an Ethernet connection
- Working with MC Protocol / SLMP-based communication
Supported software & hardware
- Mitsubishi MELSEC Q series CPUs
- GX Works2 / GX Developer / MELSOFT software
- Ethernet-connected controllers (MC Protocol / SLMP)
Who this is for
- You forgot or lost the password on your own Mitsubishi Q series PLC
- A previous engineer left and no password record was kept
- You've inherited a locked PLC you legally own and need to maintain
- You need to recover the password without physically opening the PLC
Locked out of a Mitsubishi project you own?
Send the software and version, and a short description of what you're locked out of. The work is manual and done personally — no tools sold, no downloads.
Email for recovery support More on YouTubeQuestions
Which products and versions does this cover?
It applies to Mitsubishi MELSEC Q series CPUs, GX Works2 / GX Developer / MELSOFT software, Ethernet-connected controllers (MC Protocol / SLMP).
Who does the recovery?
I do, personally. Every job is manual — it isn't automated with a tool and it isn't resold to anyone else.
Do I have to own the equipment?
Yes. I only help owners and authorized maintainers regain access to their own projects — in line with the authorized-use-only policy on the channel.
Do you sell a tool or a download for this?
No. There are no tools for sale and no downloads on this site. Recovery is a manual service I perform or guide you through.