5.Description of Function Codes
EM15 User's Manual
100
Synchronous modulation indicates that the carrier frequency varies linearly with the change of the output
frequency, ensuring that the ratio of carrier frequency to output frequency remains unchanged. Synchronous
modulation is generally used at high output frequency, which helps improve the output voltage quality.
At low output frequency (100 Hz or lower), synchronous modulation is not required. This is because ratio of
carrier frequency to output frequency is still high, and asynchronous modulation is more superior at such low
running frequency.
Synchronous modulation takes effect only when the running frequency is higher than 85 Hz. If the frequency is
lower than 85 Hz, asynchronous modulation is always valid.
d6-03
Carrier frequency adjustment with temperature
Default
1
Setting
Range
0
No
1
Yes
It is used to set whether the carrier frequency is adjusted based on the temperature. The frequency inverter
automatically reduces the carrier frequency when detecting that the heatsink temperature is high. The frequency
inverter restores the carrier frequency to the set value when the heatsink temperature becomes normal. This
function is used to reduces the overheat alarms.
d6-04
Dead zone compensation mode selection
Default
1
Setting
Range
0
No compensation
1
Compensation mode 1
2
Compensation mode 2
Generally, you need not modify this parameter. Try to use a different compensation mode only when there is
special requirement on the output voltage waveform quality or oscillation occurs on the motor.
For high power frequency inverter, compensation mode 2 is recommended.
d6-05
Random PWM depth
Default
0
Setting Range
0: Random PWM invalid
1~10: Random PWM carrier frequency depth
The setting of random PWM depth can make the motor shrill noise to soft and reduce the electromagnetic
interference to other equipments. If this parameter is set to 0, random PWM is invalid.
d6-06
Current detected compensation
Default
0
Setting Range
0~100
d6-07
SVC mode selection
Default
2
Setting
Range
1
SVC mode 1
2
SVC mode 2
SVC mode 1: Used in the application that high speed stability required.
SVC mode 2: Used in the application that high torque control linearity required.
5.22 Group U0: Monitoring Parameters
Group U0 is used to monitor the frequency inverter's running state. You can view the parameter values by using
operation panel, convenient for on-site commissioning, or from the host computer by means of communication
(address: 0x7000 ~ 0x7044).
