We have one PLC Systems model in our database, the GPN2 4P21-C-CN. It uses 192.168.88.254 as the default IP address, and the default login is admin / admin. Its default settings are below.
How to Log In to the PLC Systems GPN2 4P21-C-CN
- Connect a computer or phone to the router, with a network cable or over WiFi.
- Type http://192.168.88.254 into your browser's address bar. If nothing loads, see How To Find Your Router's IP Address.
- Sign in with the default username and password from the table below (admin / admin for this model).
Default PLC Systems IP Address
| PLC Systems Model | IP Address |
| GPN2 4P21-C-CN | 192.168.88.254 |
Default PLC Systems Username and Password
| PLC Systems Model | Username | Password |
|---|---|---|
| GPN2 4P21-C-CN | admin | admin |
| GPN2 4P21-C-CN | super | root |
Other logins we have seen on PLC Systems models: super / root.
If the Default Login Doesn't Work
Someone has probably changed the password. Check the label on the router, then factory reset it: with the router on, hold the Reset button (often a pinhole, so use a paperclip) for about 10 to 30 seconds, then let go. That puts back the default login above, and also erases your WiFi and Internet settings. See How To Reset Your Router.
More Than Router Guides
To forward ports on a PLC Systems router, see our sister site: PLC Systems port forwarding guides on Portforward.com.