STEP ET Series - P71 Group Special Functions

Chapter 7 Parameter Explanation
ET/EP/EH Series Intelligent Flexible Driver Manual
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quarter cycle of P70.33 and step length of P70.31, restore normal speed.
7.9.2 P71 group Special functions
Function code
Name
Setting range
Factory setting
P71.00
Frequency hopping velocity 1
(Hz)
0.00~655.35
0.00
P71.01
Frequency hopping velocity 2
(Hz)
0.00~655.35
0.00
P71.02
Frequency hopping velocity 3
(Hz)
0.00~655.35
0.00
P71.03
Frequency hopping width (Hz)
0.00~655.35
0.00
In order to avoid the mechanical resonance point, you can set the frequency hopping range of the
inverter. When the frequency set by the inverter falls within the frequency hopping range, it will
automatically adjust to the frequency hopping range. The frequency hopping range can be set from
[frequency hopping velocity - 0.5 × frequency hopping width, frequency hopping velocity + 0.5 ×
frequency hopping width], and three frequency modulation ranges can be set.
Figure 7-33 Upper and Lower Limits of Frequency Hopping
Function code
Name
Setting range
Factory setting
P71.05
Reversal prohibition
0~1
0
P71.06
Forward and reverse rotation
interval time (s)
0.0~6553.5
0.0
P71.07
PWM modulation mode
0~3
1
For some production equipment, reversal may cause equipment damage, which can be disabled by
using this function. P71.05 factory default allows reversal and it is set to 1: Reversal is disabled.
When the rotation direction of the motor is opposite to the direction required by the equipment, you
can exchange the wiring of any two terminals on the output side of the inverter to make the forward
rotation direction of the equipment the same as that defined by the inverter.
Set P71.06 to realize the waiting time when the inverter goes from forward to reverse (or from
reverse to forward) when the velocity passes zero.