Omron MX2 Series User Manual page 536

10 Troubleshooting
Symptom
The operation/set-
ting via Modbus
communication is
not possible.
Operating the
inverter activates
the earth leakage
breaker.
The DC injection
braking function
does not work.
The inverter trips
with an Undervolt-
age (E09).
Noise enters in the
TV or radio located
near the inverter.
An Option error
(E60 to E68)
occurred.
An Option error
(E69) occurred.
The operation/set-
ting via the option
unit (communica-
tions unit) is not
possible.
10 - 20
Possible cause
Some address setting is incor-
rect.
The leakage current from the
inverter is too large.
The DC injection braking power
is not set.
The DC injection braking time
is not set.
The voltage dropped because
the power supply capacity is
insufficient.
The TV or radio is affected by
the radiated noise from
inverter.
The inverter received an error
detected in the option unit.
Inverter fault: The option con-
nector does not work normally.
The inverter stops communicat-
ing with the option unit after
recognizing it. The option unit is
not mounted securely.
The Modbus mapping endian
function setting is inappropri-
ate.
The 1st/2nd RUN Command
Selection (A002/A202) setting
is incorrect.
The 1st/2nd Frequency
Reference Selection
(A001/A201) setting is
incorrect.
Some address setting is incor-
rect.
The Modbus mapping function
is enabled.
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Remedy
• Check that the coil or register address set-
ting is correct, which is 1 less than the coil
or register No.
• If the Modbus mapping function is in use,
check if the function settings are correct
and, if necessary, make corrections.
Decrease the Carrier Frequency (b083)
value.
Increase the sensitivity current of the earth
leakage breaker. Or replace the earth leakage
breaker with one with a higher sensitivity cur-
rent.
Set the DC Injection Braking Power (A054).
Set the DC Injection Braking Time (A055).
Increase the power supply capacity.
Move the TV or radio as far away as possible
from the inverter.
For details, refer to the manual for the option
unit.
The connector may be faulty if the problem
persists even after taking a remedy on the
option unit side. The option connector is not fit
securely: If the problem persists even after
clearing the contact area, replace the inverter.
Check the option connector for loose fitting
and dirt on terminal contacts.
Check that the terminal block cover and the
option unit cover are fit securely on the
inverter and fixed securely with the fixation
screws.
Set the Modbus Mapping Endian Selection
(P400) to 00 (Big endian).
Set the 1st/2nd RUN Command Selection
(A002/A202) to 04 (Option).
Set the 1st/2nd Frequency Reference Selec-
tion (A001/A201) to 04 (Option).
Check that index/sub-index (for EtherCAT)
and Class/Instance/Attribute (for Compo-
Net/DeviceNet) settings are correct.
Set the Modbus Mapping Function Selection
(P200) to 00 (Standard Modbus address).
Reference
page
P. 8-11
P. 8-24
P. 7-31
P. 2-22
P. 7-91
P. 7-91
−
−
−
−
−
P. 8-29
P. 5-22
P. 5-24
−
P. 8-24