Omron SYSDRIVE MX2 SERIES, User Manual

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7 Other Functions
7 - 52 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
Use this function to stabilize the motor in hunting.
If the motor is hunting, check first whether the 1st/2nd Motor Capacity (H003/H203) and 1st/2nd Motor
Pole Number (H004/H204) settings match your motor and, if they do not, match them. If the motor’s pri-
mary resistance is smaller than that of the standard motor, increase the value set in H006/H206 gradu-
ally. Or, to drive a motor with a capacity larger than the rated capacity of the inverter, reduce the set
value.
To suppress hunting, you can try the following methods as alternatives to this function.
• To decrease the Carrier Frequency (b083), refer to
7-4-1 Carrier Frequency on page 7-31.
• To decrease the 1st/2nd Output Voltage Gain (A045/A245), refer to 7-5-10 Output Voltage Gain on
page 7-41.
Use this function to use the pulse train input (single-phase) to the terminal RP as a frequency reference
or PID feedback value in each control mode.
In the Pulse Train Frequency Scale (P055), set the input pulse train frequency at the maximum frequency.
This function cannot be used in conjunction with the analog input start/end function. To apply limits to
the pulse train frequency, set the Pulse Train Frequency Bias Amount (P057) and Pulse Train Fre-
quency Upper/Lower Limit (P058/P059). Set these values in units of percentage as 100% of the maxi-
mum frequency.
In addition, be sure to set the Pulse Train Frequency Upper Limit (P058) to a value larger than the
Pulse Train Frequency Lower Limit (P059). If the P058 value is lower than the P059 value, the inverter
will output only the upper limit frequency.
7-5-15 Stabilization Parameter
Parameter
No.
Function name Data
Default
data
Unit
H006/H206
1st/2nd Stabilization
Parameter
0. to 255.
Increase or decrease the value if the
motor is hunting.
100.
−
A045/A245
1st/2nd Output Voltage
Gain
20. to 100.
Decrease the value if the motor is hunt-
ing.
100. %
b083 Carrier Frequency
2.0 to 15.0 or 2.0 to 10.0
(Heavy load/Light load)
Decrease the value if the motor is hunting.
10.0/2.0 kHz
7-5-16 Pulse Train Frequency Input
Parameter
No.
Function name Data
Default
data
Unit
P003
Pulse Train Input RP
Selection 00: Frequency setting or PID feedback
value
00
−
P055
Pulse Train Frequency
Scale
1.0 to 32.0
Set the input pulse frequency to attain the
1st Maximum Frequency (A004).
25.0 kHz
P056
Pulse Train Frequency
Filter Time Parameter
0.01 to 2.00
Set the filter time constant for pulse train
input.
0.10 s
P057
Pulse Train Frequency Bias
Amount
−
100. to 100.
0. %
P058
Pulse Train Frequency
Upper Limit 0. to 100.
100. %