Omron SYSDRIVE MX2 SERIES - Page 382

7-15
7-2 Troubleshooting
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
7
Maintenance Operations
Operation/setting
cannot be
performed via
Modbus
communication
(Modbus-RTU).
Changes to
communication
parameters are not
reflected.
If the setting of Communication Speed
Selection (C071), Communication Parity
Selection (C074) or Communication Stop
Bit Selection (C075) was changed,
reconnect the power or perform a reset (by
turning the RS terminal ON and then OFF).
6-3
The setting of RUN
Command Selection
(A002/A202) is not correct.
Set RUN Command Selection (A002/
A202) to "03: Modbus communication
(Modbus-RTU)".
5-22
The setting of Frequency
Reference Selection
(A001/A201) is not correct.
Set Frequency Reference Selection (A001/
A201) to "03: Modbus communication
(Modbus-RTU)".
5-15
The communication
speed is not set correctly.
Set the correct communication speed in
Communication Speed Selection (C071).
6-3
The station number is not
set correctly or duplicated.
Set the correct station number in
Communication Station No. Selection
(C072).
6-3
The communication parity
is not set correctly.
Set the correct communication parity in
Communication Parity Selection (C074).
6-3
The communication stop
bit is not set correctly.
Set the correct stop bit in Communication
Stop Bit Selection (C075).
6-3
The wiring is incorrect. Correctly wire the RS+ and RS− terminals
on the control circuit terminal block.
6-2
The earth leakage
breaker trips when
the Inverter is
operated.
The Inverter leak current
is large.
Decrease the Carrier Frequency (b083). 5-51
Increase the sensitivity current of the earth
leakage breaker. Or, replace the earth
leakage breaker with one of higher
sensitivity current.
2-17
DC injection
braking does not
work.
The DC injection braking
power is not set.
Set DC Injection Braking Power (A054).
5-135
The DC injection braking
time is not set.
Set DC Injection Braking Time (A055).
5-135
An Undervoltage
Trip (E09) occurs.
The voltage drops due to
insufficient power supply
capacity.
Increase the power supply capacity.
−
Noise enters in the
TV or radio located
near the Inverter.
Irradiated noise from the
Inverter.
Extend as much as possible the wiring
distance from the TV or radio to the
Inverter.
−
Condition Possible cause Remedial actions
R eference
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