Are you trying to program a (like the traffic light or silo)?
LogixPro allows you to attach text descriptions to your addresses. Labeling I:1/0 as START_PB makes your code significantly easier to troubleshoot.
are entered directly into the software's registration window to remove trial limitations, such as the 30-day expiration or restricted simulation features. Important Note on Compliance
Do not rely on numbers for Shift, Ctrl, or Alt in simple simulations; they often trigger system‑level behavior. Stick to alphanumeric and arrow keys for best results. logixpro 500 key name and key number
Over the years, LogixPro has used two main methods for handling these "keys": Floppy Disk-Based Activation
Ensure your slot number matches the specific simulation window open on your screen. To help you troubleshoot a specific program, tell me: Which simulation screen are you currently running? What error message or behavior are you experiencing? The exact address string that is giving you trouble. Share public link
Use keys 0‑9 (key numbers 11,2,3,4,5,6,7,8,9,10) to enter a 4‑digit passcode into an integer register (e.g., N7:10 ). Compare the result to a preset value (e.g., 1234) to unlock a door. Are you trying to program a (like the traffic light or silo)
+EQU+ +ONS+ +OTE+ Rung 2 |N7:5| 50--|B3/10|---------|O:2/0| | | | | | | +---+ +-----+ +-----+
: Older versions required a physical activation key residing permanently on a floppy disk. The software could be installed on multiple machines, but it would only run if the physical "key" (the floppy) was present. Software-Based Serial Keys
If you are looking for a more modern simulator, the creators of LogixPro have evolved their platform. are entered directly into the software's registration window
| Symptom | Likely Cause | Solution | |-----------------------------------------|-----------------------------------------------|--------------------------------------------------------------------------| | Pressing a key does nothing in LogixPro | Keyboard interrupt not enabled | Go to Simulation → Keyboard Interrupt and enable it. | | Random keys trigger inputs | Another application has focus | Click inside the LogixPro window to give it focus. | | Key number always shows 0 | No interrupt or wrong register address | Ensure N7:x address matches the one in your EQU instruction. | | Arrow keys move cursor instead | LogixPro’s “Use arrows for navigation” active | Disable navigation mode: Simulation → Keyboard Options → Uncheck. | | Enter key resets simulation | Conflict with default menu shortcut | Remap I:1/0 to a different key (e.g., the F12 key, number 88). |
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Ensure you use the capital letter O for outputs, not the number zero 0 .