In LogixPro 500, the key number is not a security code or serial number. Instead:
⚠️ Important: Many students confuse “key number” with activation key or license. LogixPro 500 uses a separate license code for unlocking the full version. The key number on the front panel is not for software activation. logixpro 500 key name and key number
LogixPro does not require you to manually “map” the key number to a name; the name “M key” is simply your documentation. In your rung comment, write:
"M key (key number 50) controls output O:2/0" In LogixPro 500, the key number is not
| Symptom | Likely Cause | Fix |
|---------|--------------|-----|
| Pressing Start does nothing | You used wrong Key Number (e.g., I:1/2 instead of I:1/0) | Check I/O map. |
| Two different keys activate same logic | You accidentally entered same address for both | Correct one address. |
| Key Name not found | You are using wrong simulation panel | Switch to correct panel (Door, Batch, etc.). | LogixPro does not require you to manually “map”
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.
This exercise teaches: