Omron MX2 Series User Manual page 533

Symptom
The parameter set-
tings cannot be
changed.
The motor rotates in
reverse.
The motor rotates in
reverse when the
RUN key is
pressed.
The inverter trips
with an Overcur-
rent protection
(E03) during opera-
tion.
The STOP/RESET
key does not func-
tion.
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Possible cause
The inverter is in operation.
The soft lock function is
enabled.
The phase sequence of wiring
to the motor is incorrect. (The
motor is not designed to rotate
forward in the phase sequence:
U/T1, V/T2, W/T3.)
The 3-wire input function is
enabled, but the forward/
reverse logic is incorrect.
The RUN Direction Selection
(F004) setting is incorrect.
The acceleration time is set too
short.
The load is too heavy.
The 1st Overload Limit Selec-
tion (b021)/1st Overload Limit
Selection 2 (b024) is set to 00
(Disabled).
If an overcurrent trip occurs during operation although the overload limit func-
tion is enabled:
The 1st Overload Limit Level
(b022)/1st Overload Limit Level
2 (b025) value is too high.
The 2nd Overload Limit Param-
eter/1st Overload Limit Param-
eter 2 (b023/b026) value is too
small.
The STOP/RESET key is dis-
abled.
The Overvoltage Suppression
Function Selection During
Deceleration (b130) is enabled.
The Deceleration Stop Selec-
tion on Power Interruption
(b050) is enabled.
Remedy
Stop the inverter. Then, set the parameters
again after the motor stops with deceleration.
Setting b031 to 10 (Data can be changed dur-
ing RUN) enables parameter settings to be
changed even when the inverter operates.
Disable the Soft Lock Selection (b031).
Reverse the order of two wires connected to
U/T1, V/T2, W/T3, or change the phase
sequence to match that of the motor.
Check the logic of the F/R (3-wire forward/
reverse) signal allocated to a multi-function
input terminal (C001 to C007 = 22).
Set the RUN Direction Selection (F004) cor-
rectly.
Increase the value set in the 1st/2nd Acceler-
ation Time 1/2 (F002/F202/A092/A292).
Use the acceleration/deceleration stop func-
tion to change the operation pattern to stop
accelerating temporarily.
Reduce the load.
Use the torque boost function to adjust the
torque.
Set the 1st/2nd Control Method (A044/A244)
to 03 (Sensorless vector control) and perform
tuning.
Enable the 1st Overload Limit Selection
(b021)/1st Overload Limit Selection 2 (b024).
Decrease the 1st Overload Limit Level
(b022)/1st Overload Limit Level 2 (b025)
value.
Increase the 2nd Overload Limit Parame-
ter/1st Overload Limit Parameter 2
(b023/b026) value.
Set the STOP Key Selection (b087) correctly.
Set the Overvoltage Suppression Function
Selection During Deceleration (b130) to 00
(Disabled), or adjust the level and other set-
tings of the function.
Set the Deceleration Stop Selection on Power
Interruption (b050) to 00 (Disabled), or adjust
the level and other settings of the function.
10 Troubleshooting
Reference
page
−
P. 7-54
P. 2-11
P. 5-54
P. 5-22
P. 5-33
P. 5-37
P. 7-37
−
P. 5-60
P. 5-9
P. 6-3
P. 7-76
P. 7-76
P. 7-76
P. 5-42
P. 5-63
P. 7-63
10 - 17
10