7-16
7-2 Troubleshooting
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-A@@@@)
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.
−
An optional board
error (E60 to E68)
occurred.
The optional board
detected and error and
notified the Inverter.
Refer to the manual for the optional board.
−
Inverter failure: The
optional board connector
is not operating properly.
If the problem cannot be fixed in the
optional board, the Inverter may have
failed. The mating of the option connector
may be bad. Check of dirty contacts and
other possible causes. If the problem
cannot be solved, replace the Inverter.
−
An optional board
error (E69)
occurred.
Communications became
impossible after detecting
the option. The optional
board is partly
disconnected.
Check for bad option connector mating,
dirty terminal contacts, etc. Check to see if
the terminal block cover on the Inverter and
the cover on the optional board are mated
properly and the screws are properly
tightened.
−
Condition Possible cause Remedial actions
R
eference
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