When a failure occurs, it is important to correctly grasp what kind of
failure occured and take appropriate action, to promptly recover the
Check for the failure according to the following procedure :
Grasp the kind of failure
(1) When and how many times (frequency of occurrences)
(2) With what operation
(3) What failure occurred
1 When did the failure occur?
Date and time?
Occurred during operation? (how long was the operation?)
Occurred when the power was turned on?
Was there any lightening surge, power failure, or other disturbances
to the power supply?
How many times has it occurred
Occurred many times ? (How many times per hour, per day, or per
2 With what operation did it occur ?
⋅ What was the Power Mate mode when the failure occurred?
(Jog mode/AUTO operation mode /MDI mode /reference position
⋅ If during program operation,
1) Where in the program ?
2) Which program No. and sequence No. ?
3) What program ?
4) Occurred during axial movement ?
5) Occurred during the execution of an M/S/T code ?
6) Failure specific to the program ?
⋅ Does the same operation cause the same failure ?
(Check the repeatability of the failure.)
⋅ Occurred during data input/output ?
which Failure Occurred