TECO-Westinghouse EQ7 Series, Инструкция по эксплуатации, Страница: 224 / 248

10-21
[ 24 ] 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.
 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 through H53, H65,
H66, P02*, and P03*) matches the motor specifications.
(3) The wiring length between
the inverter and the motor
was too long.
Check whether the wiring length between the inverter and the motor exceeds 164
ft (50 m).
(Small capacity inverters are greatly affected by the wiring length.)
 Review, and if necessary, change the layout of the inverter and the motor to
shorten the connection wire. Alternatively, minimize the wiring length without
changing the layout.

Disable both auto-tuning and auto-torque boost (set data of 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 three or more ranks lower, or
two or more ranks higher than that of the inverter.
 Replace the inverter with one with an appropriate capacity.
 Manually specify the values for the motor parameters P06*, P07*, and P08*.
 Disable both auto-tuning and auto-torque boost (set data of F37* to "1").
(5) The motor was a special
type such as a high-speed
motor.
 Disable both auto-tuning and auto-torque boost (set data of F37* to "1").
(6) A tuning operation involving
motor rotation (P04* = 2 or
3) was attempted while the
brake was applied to the
motor.
 Specify the tuning that does not involve the motor rotation (P04* = 1).
 Release the brake before tuning that involves the motor rotation (P04* = 2 or
3).

For details of tuning errors, refer to Chapter 4 of the user manual, Section 4.1.7 "Function code basic settings and
tuning < 2 >,  Tuning errors."
[ 25 ] RS-485 communications error (COM port 1)
RS-485 communications error (COM port 2)
Problem A communications error occurred during RS-485 communications.
Possible Causes What to Check and Suggested Measures
(1) Communications conditions
of the inverter do not match
that of the host equipment.
Compare the settings of the y codes (y01 to y10, y11 to y20) with those of the
host equipment.
 Correct any settings that differ.
(2) Even though no-response
error detection time (y08,
y18) has been set,
communications is not
performed within the
specified cycle.
Check the host equipment.
 Change the settings of host equipment software or disable the no-response
error detection (y08, y18 = 0).
(3) The host equipment did not
operate due to defective
software, settings, or
defective hardware.
Check the host equipment (e.g., PLCs and computers).
 Remove the cause of the equipment error.
(4) The RS-485 converter did
not operate due to incorrect
connections and settings, or
defective hardware.
Check the RS-485 converter (e.g., check for poor contact).
 Change the various RS-485 converter settings, reconnect the wires, or
replace hardware with recommended devices as appropriate.
(5) Broken communications
cable or poor contact.
Check the continuity of the cables, contacts and connections.
 Replace the cable.