YASKAWA Varispeed G7 Series Instruction Manual page 434

Corrective Actions for Control Faults (CF)
CF occurs
Are the motor and
Inverter connected
properly?
Yes
Are the motor
constants set
correctly?
Yes
Has autotuning been
executed for line-to-line
resistance?
Yes
Are the torque limit settings (L7-01
to L7-04, analog input) or the torque
reference input too small?
No
Is the stopping
method appropriate?
Yes
Is an operation reference
being input while the motor
is coasting?
No
What is the CF error
code (U1-50)?
Use in open loop vector 1 control.
Meaning of CR Error Codes
U1-50
00
01
02
04
08
10
20
No
Fix the wiring.
U1-50 = 01,02
Execute autotuning for the
No
motor constants.
U1-50 = 00,01,
Execute autotuning for the
No
02,08
line-to-line resistance.
Increase the torque limit
Yes or torque reference until
is it within the allowable
range for the machine.
U1-50 = 00
If deceleration stop is not
No possible or unnecessary
for the machine, set b1-03
to 1 (coast to stop).
U1-50 = 02
· Input the operation reference
after the motor stops.
Yes
· Set b3-01 to 1 or 3 (speed
search enabled).
U1-50 = 04
Adjust the speed estimator's
integral time (N4-07) or
proportional gain (N4-08).
U1-50 = 08
If the machine rotates only in the
same direction as the sign of the
speed limit, set b1-10 to 1.
U1-50 = 10 · 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.
U1-50 = 20
· If the machine rotates in the
opposite direction to the sign of
the speed limit (unwinding
operation), set d5-07 to 0.
· Start with speed control and then
switch to torque control when the
frequency exceeds 3 Hz.
Stop error
Magnetic flux calculation error 1
Magnetic flux calculation error 2
Speed estimator gain adjustment fault
Low-speed regeneration fault
Zero-speed fault
Rotation direction limit fault
Protective and Diagnostic Functions
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 5-66. 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 6-65.
Refer to Procedure for
Increasing the Speed
Response (PRG 102
on page 4-33.
Refer to Speed/Torque
Control Switching Function
on page 6-136.
Meaning
 only)
15
7-