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Detailed steps for configuring the MT500 frequency inverter to “display the actual rotational speed in RPM”:

Goal: make the MT 500 drive’s LED keypad show actual motor speed in r/min (RPM).
Assumptions: drive is stopped, control source = keypad.

1 . Enter the parameter list (“Standard menu”)

ActionExpected displayComment
Press ESC repeatedly from the normal monitor screen‑bSC‑“Basic / Standard menu” root 
Press ENTERP00.00You are now at the parameter index level

Tip: ESC moves up one level; ENTER confirms / goes down.

MT500

2 . Fill in the motor name‑plate data

(needed so the drive can translate Hz → RPM correctly)

2‑a  Locate P11.05 Rated frequency
  1. While P00.00 is shown:
    • Press SHIFT until the left‑most digit blinks.
    • Tap UP until that digit becomes 1 → display reads P10.00.
    • Press SHIFT once to move the cursor to the last digit; UP once → P11.00.
    • Tap UP five more times → P11.05.
  2. Press ENTER – the current value (e.g. 50.00) blinks.
2‑b  Edit the value
  • Use SHIFT to select the digit; UP / DOWN to change it.
  • Press ENTER to save. Display flashes End, then returns to P11.05. 
2‑c  Repeat for P11.06 Rated speed
  • Navigate to P11.06 the same way; enter the motor’s rated RPM; ENTER to save. 

3 . (Optional) Run auto‑tune P11.10

ActionDisplay
Go to P11.10, ENTERvalue blinks (default 0)
UP → 1 (stand‑still tune) or 2 (rotating tune)
ENTER to store → EndAuto‑tune will start the first time you press RUN afterwards 

4 . Switch the display unit from Hz to RPM — P21.17

ActionExpected display
Press ESC twice to get back to P00.00; jump to P21.17P21.17
ENTER – value blinks (0 = Hz)
UP once → 1 (= RPM)
ENTER to save → EndThe Hz and A LEDs now light together, meaning the keypad shows RPM 

5 . See the live speed

  1. Press ESC until the normal monitor screen returns.
  2. The default monitored variable is r27.00. Because P21.17 = 1, its value is already in RPM. 
  3. Press SHIFT (>>) to step through other view pages if needed; the Hz + A LEDs confirm the unit remains RPM.
mt500-7r5-t4b

6 . (Optional) Show only speed on the monitor page

If you dislike the rotating multi‑page display:

  1. Navigate to P21.11 (run‑mode sequence) and set it to 0001.
  2. Do the same for P21.12 (stop‑mode sequence) if desired.

Now the keypad will lock onto a single page that shows r27.00 in RPM.

Quick trouble‑shooting

SymptomLikely causeFix
Still shows HzP21.17 not saved, or you are viewing another variableRe‑enter 1; check Hz+A LEDs
RPM reading off by a lotWrong name‑plate data or no auto‑tuneRe‑check P11.05 / P11.06, run P11.10
Cannot enter parametersUser lock activeEnter password in P00.00 or restore defaults

Ultra‑short recap

  1. ESC → ‑bSC‑ → ENTER → parameter list.
  2. Set P11.05 (rated Hz) & P11.06 (rated rpm).
  3. (Option) P11.10 = 1 or 2, auto‑tune after RUN.
  4. P21.17 = 1 → units = RPM.
  5. Monitor page now shows real speed; enjoy!