Mitsubishi AJ65VBTCU-68DAV Error 20□

Mitsubishi AJ65VBTCU-68DAV · taken from the manufacturer’s manual, pages cited

Error code20□

The output range setting is outside the specified range. The manual's first action is: “Correct the output range setting to within the setting range.”

Model
Mitsubishi AJ65VBTCU-68DAV
Display shows
20□
Type
Error code
Source
Manual p. 61

What 20□ means

The output range setting is outside the setting range. p. 61

Common causes

  • The output range setting is outside the setting range. p. 61
  • The "POWER" LED is off. p. 61
  • The voltage of the 24VDC power supply is not within the specified value. p. 61
  • The "RUN" LED flickers at 0.1s intervals in normal mode. p. 61
  • The "RUN" LED flickers at 0.5s intervals in normal mode. p. 61
  • The "RUN" LED flickers at 0.5s intervals in test mode. p. 61
  • The "RUN" LED is off. p. 61
  • The "L RUN" LED is off. p. 61

Safety warnings — read before you start

  • DANGERDANGER. Configure a safety circuit so that the safety of the overall system is maintained even when an external power error of PLC error occurs. p. 2

What to do

  1. Correct the output range setting to within the setting range. p. 61
  2. Check the external power supply. p. 61
  3. Set the voltage value to within the range 20.4 to 26.4V. p. 61
  4. Check that the mode select switch is in the position other than 0. Using the error code (RWm+8), check the channel at which the output range setting error has occurred. Make correction to the sequence program or GX Developer setting. p. 61
  5. Using the error code (RWm+8), check the channel at which the digital value setting error has occurred. Check the check code (RWm to RWm+7) of the channel at which the error has occurred. Make correction to the sequence program. p. 61
  6. Change the offset/gain adjustment to within the available setting range. p. 61
  7. Using the link special registers (SW0084 to SW0087) of the master module, check the watchdog timer error and power on the AJ65VBT CU-68DAV again. If the "RUN" LED is not lit after power is switched on again, the possible cause is a hardware fault. Contact your nearest Mitsubishi representative. p. 61
  8. Communications are broken. For details, refer to troubleshooting in the user's manual of the master module used. p. 61

If 20□ is still not resolved

  • Contact your nearest Mitsubishi representative. p. 62
    “Contact your nearest Mitsubishi representative.”
Open the manual at page 61 All AJ65VBTCU-68DAV error codes Manual details & download

This page summarises what the manufacturer’s manual says about 20□; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi. Found a mistake? Report an error.