Fuji Electric FRENIC-ECO - Er7 Tuning Error; Er8 RS-485 Communications Error

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[ 21 ] er7 Tuning error
Problem Auto-tuning failed.
Possible Causes What to Check and Suggested Measures
(1) A phase was missing
(There was a phase loss)
in the connection between
the inverter and the motor.
Î Properly connect the motor to the inverter.
(2) V/f or the rated current of
the motor was not properly
set.
Check whether the data of function codes F04, F05, H50, H51, P02, and P03
agrees with the specifications of the motor.
(3) The connection between
the inverter and the motor
was too long.
Check whether the connection length between the inverter and the motor is
not exceeding 50m.
Î Review, and if necessary, change the layout of the inverter and the moto
r
to shorten the connection wire. Alternatively, minimize the connection
wire length without changing the layout.
Î Disable both auto-tuning and auto-torque (set F37 to "1").
(4) The rated capacity of the
motor was significantly
different from that of the
inverter.
Check whether the rated capacity of the motor is smaller than that of the
inverter by three or more orders of class or larger by two or more orders o
f
class.
Î Check whether it is possible to replace the inverter with one with an
appropriate capacity.
Î Manually specify the values for the motor parameters P06, P07, and P08.
Î Disable both auto-tuning and auto-torque boost (set F37 to "1").
(5) The motor was a special
type such as a high-speed
motor.
Î Disable both auto-tuning and auto-torque boost (set F37 to "1").
 For details of tuning errors, refer to “Errors during Tuning” in Chapter 4, Section 4.1.3 “Preparation before
running the motor for a test – Setting function code data.”
[ 22 ]
er8 RS-485 communications error
Problem A communications error occurred during RS-485 communications.
Possible Causes What to Check and Suggested Measures
(1) Conditions for
communications differ
between the inverter and
host equipment.
Compare the settings of the y codes (y01 to y10) with those of the host
equipment.
Î Correct any settings that differ.
(2) Even though no response
error detection time (y08)
has been set,
communications is not
performed within the
specified cycle.
Check the host equipment.
Î Change the settings of host equipment software, or make the no
response error detection time be ignored (y08=0).
(3) Host equipment (e.g.,
PLCs and personal
computers) did not
operate due to incorrect
settings and/or defective
software/hardware.
Check the host equipment.
Î Remove the cause of the equipment error.
(4) Relay converters (e.g.,
RS-485 relay converter)
did not operate due to
incorrect connections and
settings, or defective
hardware.
Check the RS-485 relay converter (e.g., check for poor contact).
Î Change the various RS-485 converter settings, reconnect the wires, o
r
replace hardware (such as recommended devices) as appropriate.
(5) Broken communications
cable or poor contact.
Check continuity of the cable, contacts and connections.
Î Replace the cable.