If The Module Ready Flag (Xn0) Does Not Turn On; If The Write Error Flag (Xn2) Has Turned On; If The Hardware Error Flag (Xn3) Has Turned On; If The Auto Tuning Does Not Start (If The Auto Tuning Status (Xn4 To Xn7) Does Not Turn On) - Mitsubishi Electric MELSEC Q Series User Manual

8 TROUBLESHOOTING

8.6 If the Module Ready Flag (Xn0) Does Not Turn On

8.7 If the Write Error Flag (Xn2) Has Turned On

8.8 If the Hardware Error Flag (Xn3) Has Turned On

8.9 If the Auto Tuning Does Not Start (If the Auto Tuning Status (Xn4 to Xn7) Does Not Turn
On)
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Check item
Has a watchdog timer error occurred?
Has an error occurred in the programmable
controller?
Check item
Has a write data error occurred?
Check item
Is the cold junction temperature compensation
resistor disconnected?
Check item
Are start conditions for auto tuning met?
Has auto tuning been completed abnormally?
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MELSEC-Q
Corrective action
• Reset the programmable controller CPU or
power it on again.
• Change the Q64TC.
• Refer to the used programmable controller
CPU User's Manual and take corrective
action.
Corrective action
• Check the error code list in Section 8.1 and
correct the sequence program.
Corrective action
• Connect the cold junction temperature
compensation resistor.
• The Q64TC hardware fault.
Please consult your sales representative.
Corrective action
• Check whether the all conditions are met
with referring to Section 3.2.1 (2) (a).
• Check whether the auto tuning has
completed abnormally with referring to
Section 3.2.1 (2) (d).
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