Motor Speed Cannot Be Changed - Delta Electronics AC Motor Drive VFD-E User Manual

5.10 Motor Speed cannot be Changed

For VFD*E*C models, no PLC function is supported. Please follow the dashed line to skip the PLC
parts.
Modify the setting
Yes
If the execution
time is too long
Yes
No
If finished with
Yes
executing PLC
program
No
Yes
Check if the PLC
program is correct
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
Motor can run but
cannot change speed
Check if the setting of the
Yes
max. frequency is too low
Check to see if frequency is
out of range (upper/lower)
boundaries
If the PLC program
Yes is executed
No
Check if the wiring between
MI1~MI6 to DCM is correct
Check if frequency for
each step is different
No
Check if accel./decel.
time is set correctly
Please set suitable
accel./decel. time by
load inertia
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact DELTA.
Chapter 5 Troubleshooting|
No
Yes
No
No
No
Yes
Correct
wiring
No
Yes
Change frequencysetting
Yes
Modify the setting
Press UP/DOWN key
to see if speed has
any change
If there is any change
of the signal that sets
frequency (0-10V and
4-20mA)
No
Check if the wiring of
No
external terminal is correct
Yes
Change defective
potentiometer
Yes
Yes
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