Instruction manual

80
Details of Troubleshooting
3.4.5 Acceleration/deceleration is not as commanded
• Causes under V/F control
• Causes under control other than V/F control
Cause Measures
Related
Parameters
The acceleration/deceleration time(Pr. 7,
Pr. 8, etc.) setting is too small.
Set a larger value in acceleration/deceleration time (Pr. 7, Pr. 8, etc.). (In
vertical lift applications, set a smaller value.)
Pr. 7, 44, 110
V/F control related parameter setting is not
an appropriate value.
Adjust torque boost (Pr. 0, etc.), base frequency (Pr. 3, etc.), base
frequency voltage (Pr. 19), load pattern selection (Pr. 14).
Pr. 0, 3, 14, 19, 46,
47, 112, 113
Stall prevention is activated due to heavy
load (GD2).
Increase stall prevention level (Pr. 22, etc.) or limit stall prevention
operation using stall prevention operation selection (Pr. 156).
Pr. 22, 156
Cause Measures
Related
Parameters
The acceleration/deceleration time(Pr. 7,
Pr. 8, etc.) setting is too small.
Set a larger value in acceleration/deceleration time (Pr. 7, Pr. 8, etc.). (In
vertical lift applications, set a smaller value.
Pr. 7, 44, 110
Motor specifications setting is not
appropriate.
Check that the motor specifications setting is correct.
Pr. 71, 80, 81, 83,
84, 450, 453, 454,
456, 457
Stall prevention operation or regeneration
avoidance function is set.
(1) Execute trouble shooting of "Motor current is large"
(2) Set a larger value in acceleration/deceleration time (Pr. 7, Pr. 8, etc.).
(3) Try other control method.
(4) Increase stall prevention level (Pr. 22, etc.) or limit stall prevention
operation using stall prevention operation selection (Pr. 156).
(5) Adjust regeneration avoidance related parameters.
(2) Pr. 7, 8, 44, 45,
110, 111
(3) Pr. 71, 80, 81,
83, 84, 96, 450,
451, 453, 454,
456, 457, 463,
800
(4) Pr. 22, 23, 48,
114, 156
(5) Pr. 665, 882,
883, 884, 885,
886
Offline auto tuning is not performed. Perform Offline auto tuning. Pr. 96, 463
Load is heavy. Check the load. -