Mitsubishi Electric MELSEC-Q Series User Manual (English)

Other manuals for Mitsubishi Electric MELSEC-Q Series

User Manual834 pages

Reference Manual674 pages

Manual35 pages

Programming Manual624 pages

Handbook244 pages

Structured Programming Manual122 pages

Questions and Answers:

C
Carmen NewtonAug 29, 2025
What to do if Mitsubishi Electric MELSEC-Q displays error code 3?
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  bryantmonicaAug 29, 2025
  If the Mitsubishi Electric Controller displays error code 3, it means a write operation to an area enabled only in setting mode was performed in operation mode. Correct this by: 1. Switching to the setting mode. 2. Setting the correct value. 3. Activating the error reset command (Yn2). Also, when switching from operation mode to setting mode, ensure the PID continuation flag (buffer memory address: A9H) is 0 and turn off the operation mode command (Yn1).
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Mrs. Cynthia GrahamSep 6, 2025
Why is the L RUN LED not turning on for my Mitsubishi Electric Control Unit?
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  cunninghamjillSep 6, 2025
  If the L RUN LED does not turn on for your Mitsubishi Electric Control Unit, and data link is established, it may be because the transmission speed setting of the master station was changed. Power off and on the system. Also, check that the communication cable is correctly wired.
D
Donna LeonAug 28, 2025
What to do if Mitsubishi Electric MELSEC-Q shows error code 4?
- C
  Christopher SchultzAug 28, 2025
  If the Mitsubishi Electric Controller displays error code 4, it means data outside the allowed setting range was entered. To fix this, ensure that you set the data within the specified range.
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stephenreynoldsSep 7, 2025
How to fix L RUN LED not turning on in Mitsubishi Electric Control Unit?
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  Sierra CallahanSep 7, 2025
  If the L RUN LED does not turn on for your Mitsubishi Electric Control Unit, it may be because the CPU module has just exited from reset status. Wait for a while. Another possible cause is that Data link stop (bit 0) of Data link stop/restart instruction is on. Turn off the Data link stop then turn on Data link restart (bit 15).
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Kevin RiversSep 7, 2025
Why is the ERR. LED flashing on my Mitsubishi Electric Control Unit?
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  alexandercatherineSep 7, 2025
  When the operation setting switch is switched after power-on, the ERR. LED starts flashing. Reset the switch to the status before the switching.
A
Amber DavenportSep 10, 2025
Why values of buffer memories cannot be restored to default settings in Mitsubishi Electric I/O Systems?
- S
  Shelly MossSep 10, 2025
  The values of buffer memories cannot be restored because the Conversion enable/disable setting (Un\G0) has a channel of conversion enable. Set Conversion enable/disable setting (Un\G0) to Disable (1) for all channels, then execute the default setting registration function.
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Ronald RodriguezSep 13, 2025
What value should be set in CH? Trigger data (Un\G1064 to Un\G1071) for Mitsubishi Electric I/O Systems?
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  Kyle WilliamsSep 13, 2025
  Set a value within the range of 0 to 4999 in CH? Trigger data (Un\G1064 to Un\G1071).
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Elizabeth GilmoreAug 26, 2025
What to do if Mitsubishi Electric MELSEC-Q Controller shows operation errors (Error code: 1000 to 1899)?
- S
  Sarah MejiaAug 27, 2025
  If your Mitsubishi Electric Controller displays operation errors with error codes ranging from 1000 to 1899, correct the parameters. After correcting the parameters, reset the error and then turn ON the PLC READY signal [Y0].
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ryanthompsonAug 26, 2025
How to fix a Mitsubishi Electric MELSEC-Q when the RUN LED does not turn on?
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  Molly CamachoAug 26, 2025
  If the RUN LED on your Mitsubishi Electric Controller does not turn on, it could be because the module is not ready. Wait until the module starts. Alternatively, a watchdog timer error (X1F) might be active. If the watchdog timer error is ON, please consult your local Mitsubishi representative.
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Deanna JenkinsAug 25, 2025
What to do if CompactFlash card setting status (X1) does not turn on, or it takes a long time to turn on, on Mitsubishi Electric MELSEC-Q?
- Q
  qsmithAug 26, 2025
  If the CompactFlash card setting status (X1) on your Mitsubishi Electric Controller doesn't turn on or takes a long time, it may be because the file access stop status is active (X2 is on). Cancel the file access stop status to resolve this. Another potential cause is having many files stored on the CompactFlash card, which lengthens the time required for X1 to turn on. In this case, deleting unnecessary files in the CompactFlash card may help.