Megmeet MV820 - Page 285

285
Symptom
Condition
Possible cause
Solution
Too large speed deviation
Modify the speed
deviation detection value
The positive/negative logic of the
control terminals changes.
Check if the P09.12 and
P09.13 settings meet the
requirements
No stop command is
received, but the motor
stops automatically and
the drive run indicator is
on (running at zero
frequency).
Automatic fault reset
Check the fault auto
reset setting and find out
the cause
Simple PLC pause
Check the PLC pause
function terminal
External interruption
Check the external
interruption setting and
find out the cause
The frequency reference is 0.
Check the frequency
reference
The startup frequency is higher
than the frequency reference.
Check the startup
frequency
Skip frequency is set improperly.
Check the skip frequency
setting
The closed-loop output is negative
when the reverse running is
inhibited.
Check the P14.19 and
P08.27 settings
“Forward running inhibition”
terminal is enabled during forward
running.
Check the terminal
function setting
“Reverse running inhibition”
terminal is enabled during reverse
running.
Check the terminal
function setting
Transient low-voltage
compensation is applied for restart
after power failure and the power
supply voltage is too low.
Check the restart after
power failure function
setting and the input
voltage