YASKAWA Varispeed G7 Instruction Manual page 404

Corrective Actions for Control Faults (CF)
Inverter connected
Has autotuning been
executed for line-to-line
Are the torque limit settings (L7-01
to L7-04, analog input) or the torque
reference input too small?
method appropriate?
Is an operation reference
being input while the motor
What is the CF error
Use in open loop vector 1 control.
Meaning of CR Error Codes
-14
7
CF occurs
Are the motor and No
properly?
Yes
U1-50 = 01,02
Are the motor
No
constants set
correctly?
Yes
U1-50 = 00,01,
No
02,08
resistance?
Yes
Yes
No
U1-50 = 00
No
Is the stopping
Yes
U1-50 = 02
Yes
is coasting?
No
U1-50 = 04
code (U1-50)?
U1-50 = 08
U1-50 = 10
U1-50 = 20
U1-50
00 Stop error
01 Magnetic flux calculation error 1
02 Magnetic flux calculation error 2
04 Speed estimator gain adjustment fault
08 Low-speed regeneration fault
10 Zero-speed fault
20 Rotation direction limit fault
Fix the wiring.
Execute autotuning for the
motor constants.
Execute autotuning for the
line-to-line resistance.
Increase the torque limit
or torque reference until
is it within the allowable
range for the machine.
If deceleration stop is not
possible or unnecessary
for the machine, set b1-03
to 1 (coast to stop).
· Input the operation reference
after the motor stops.
· Set b3-01 to 1 or 3 (speed
search enabled).
Adjust the speed estimator's
integral time (N4-07) or
proportional gain (N4-08).
If the machine rotates only in the
same direction as the sign of the
speed limit, set b1-10 to 1.
· If the machine rotates only in the
same direction as the sign of the
speed limit (winding operation), set
d5-07 to 1.
· Ensure that the motor's speed is
not 0 or that it does not rotate in
the opposite direction.
· If the machine rotates in the
opposite direction to the sign of
the speed limit (rewinding
operation), set d5-07 to 0.
· Start with speed control and then
switch to torque control when the
frequency exceeds 3 Hz.
Meaning
Refer to Autotuning on page
4-9. Execute autotuning after
the control method is
changed.
Refer to Autotuning on page
4-9. Execute autotuning
after changing cables.
Refer to Torque Limits: L7
on page 5-65. In particular, if
the regenerative torque limit
has been reduced to prevent
overvoltages, set L3-11 to 1
and set the regenerative
torque limit to a large value.
Refer to Speed Search
on page 6-64.
Refer to Procedure for
Increasing the Speed
Response (PRG: 102 only)
on page 4-21.
Refer to Speed/Torque
Control Switching Function
on page 6-134.