Operation status Phenomenon Description of adjustment
Adjustment
item
Motor rotating
Rotation is un-
stable.
If the motor rotation is unstable during startup, in-
crease the motor starting current.
However, setting this parameter to an excessively
large value may cause detection of an overload.
Check the value in the monitor of electronic ther-
mal overload protection for motor (monitor mode:
5_62).
3007Hex-4BH
ex
A shock or
overcurrent trip
occurs.
Adjust the speed control gain to a larger value and
the integral time to a smaller value.
3014Hex-04He
x,
3014Hex-05He
x
Motor is hunt-
ing or vibrat-
ing.
Adjust the speed control gain to a smaller value
and the integral time to a larger value.
3014Hex-04He
x,
3014Hex-05He
x
Increase the carrier frequency if it is low
.
3004Hex-1BH
ex
Gradually increase the PM motor d-axis induc-
tance.
Gradually increase the PM motor q-axis induc-
tance.
3007Hex-3EH
ex
3007Hex-3FHe
x
Overcurrent protection
PM motors must set with an allowable current value for preventing the permanent magnet from be-
coming demagnetized. If a current exceeding this allowable current value is allowed to pass, the mag-
netic force of the permanent magnet weakens and the desired motor characteristics can no longer be
obtained.
When a current of current value set in 1st PM Motor Overcurrent Protection Level (3007Hex-5BHex) or
higher flows, overcurrent protection alarms (alarm code: 01, 02, 03) are output to protect the motor.
Parameter No. Function name Data Default data Unit
3007Hex-5BHex
1st PM Motor Overcurrent
Protection Level
0.00 to 4000A
(0.00: No active)
50.00 A
High-efficiency Control
In the operation of PM motors, motor parameters are used to perform high-efficiency control. Opera-
tion of a PM motor with the motor parameters unknown or in a state where rotation tuning cannot be
performed is sometimes possible by disabling high-ef
ficiency control.
T
o disable high-efficiency control, set PM Motor High-efficiency Control Selection (3014Hex-5AHex) to
0.
Parameter No. Function name Data Default data Unit
3014Hex-5AHex
PM Motor High-efficiency
Control Selection
0: Disable
1: Enable
1 -
7 Vector Control and Applied Functions
7-24
M1 Series EtherCAT Type User’s Manual (I670)
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