Mitsubishi Electric FR-F700PJ Series, Инструкция по эксплуатации

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315
5
TR
O
U
BLE
S
HOOTING
Check first when you have a trouble
5.5.12 Speed does not accelerate
5.5.13 Unable to write parameter setting
Check
points
Possible Cause Countermeasures
Refer
to
page
Input
signal
Start command and frequency command are chattering.
Check if the start command and the frequency
command are correct.
—
The wiring length used for analog frequency command
is too long, and it is causing a voltage (current) drop.
Perform analog input bias/gain calibration. 188
Input signal lines are affected by external EMI.
Take countermeasures against EMI, such as using
shielded wires for input signal lines.
45
Parameter
Setting
Pr. 1, Pr. 2, Pr. 18, calibration parameter C2 to C7 settings
are improper.
Check the settings of Pr. 1 Maximum frequency and Pr. 2
Minimum frequency . If you want to run the motor at 120Hz
or higher, set Pr. 18 High speed maximum frequency .
101
Check the calibration parameter C2 to C7 settings. 188
During IPM motor control, maximum frequency is limited
to the maximum motor speed (frequency) of the IPM
motor.
340
The maximum voltage (current) input value is not set
during the External operation.
(Pr.125, Pr.126, Pr.18)
Check the Pr.125 Terminal 2 frequency setting gain
frequency and Pr.126 Terminal 4 frequency setting gain
frequency settings. To operate at 120Hz or higher, set
Pr.18 High speed maximum frequency .
101 ,
188
Torque boost (Pr. 0, Pr. 46) setting is improper under V/F
control, so the stall prevention function is activated.
Increase/decrease Pr. 0 Torque boost setting value by
0.5% increments so that stall prevention does not occur.
92
V/F pattern is improper when V/F control or General-
purpose magnetic flux vector control is performed.
(Pr. 3, Pr. 14, Pr. 19)
Set rated frequency of the motor to Pr. 3 Base frequency .
(V/F control, General-purpose magnetic flux vector
control)
Use
Pr. 19 Base frequency voltage to set the base voltage
(e.g. rated motor voltage). (V/F control, General-purpose
magnetic flux vector control)
103
Change Pr. 14 Load pattern selection according to the load
characteristic. (V/F control)
105
Stall prevention function is activated due to a heavy
load.
Reduce the load weight. —
Set Pr. 22 Stall prevention operation level higher according
to the load. (Setting Pr. 22 too large may result in
frequent overcurrent trip (E.OC  ).)
96
Check the capacities of the inverter and the motor. —
Auto tuning is not performed under General-purpose
magnetic flux vector control.
Perform offline auto tuning. 125
During PID control, output frequency is automatically controlled to make measured value = set point. 250
Main
Circuit
Brake resistor is connected between terminal P/+ and
P1 by mistake. Connect an optional brake transistor (MRS type, MYS
type, FR-ABR) between terminal P/+ and PR.
34
Check
points
Possible Cause Countermeasures
Refer
to
page
Input
signal
Operation is being performed (signal STF or STR is
ON).
Stop the operation.
When
Pr. 77
= "0" (initial value), write is enabled only
during a stop.
196
Parameter
Setting
You are attempting to set the parameter in the External
operation mode.
Choose the PU operation mode.
Or, set
Pr. 77
= "2" to enable parameter write regardless
of the operation mode.
196
Parameter is disabled by the
Pr. 77 Parameter write
selection
setting.
Check
Pr. 77 Parameter write selection
setting.
196
Key lock is activated by the
Pr. 161 Frequency setting/key
lock operation selection
setting.
Check
Pr. 161 Frequency setting/key lock operation selection
setting.
278
Operation mode and a writing device do not
correspond. Check
Pr. 79, Pr. 338, Pr. 339, Pr. 551,
and select an
operation mode suitable for the purpose.
200
,
214