FR500A&FR510A Series Vector Control Inverter
- 143 -
eight carry quantities can be selected. Specific relations are as follows:
Carry amount
selection terminal 3
Carry amount
selection terminal 2
Carry amount
selection terminal 1
Carry amount
OFF
OFF
OFF
Carry amount
0（F21.17、
F21.18）
OFF
OFF
ON
Carry amount
1（F21.19、
F21.20）
OFF
ON
OFF
Carry amount
2（F21.21、
F21.22）
OFF
ON
ON
Carry amount
3（F21.23、
F21.24）
ON
OFF
OFF
Carry amount
4（F21.25、
F21.26）
ON
OFF
ON
Carry amount
5（F21.27、
F21.28）
ON
ON
OFF
Carry amount
6（F21.29、
F21.30）
ON
ON
ON
Carry amount
7（F21.31、
F21.32）
F21.33
Selection of
Position-Given Mode
Range
：
0
～
2
Default
：
0
0:X7/DI Pulse Input
The "position given pulse input" terminal is only valid for X7/DI terminal. The given pulse mode is input
through X7/DI terminal, and the maximum pulse frequency is 30K. When the secondary terminal is
OFF, the input pulse is positive; when the secondary terminal is ON, the input pulse is reverse.
1: Given the A/B phase pulse, the A phase is 90 degrees ahead of the B phase.
2: Given the A/B phase pulse, the encoder has a 90 degree positive turn in phase B ahead of
phase A.
F21.34
Electronic Gear Ratio
Molecule
Range
：
1
～
9999
Default
：
1000
F21.35
Electronic gear
denominator
Range
：
1
～
9999
Default
：
1000
The change ratio of given pulse and feedback pulse can be changed by electronic gear.
Molecule: Denominator = Feedback Pulse Variation in Unit Time: Given Pulse Variation in Range
Time.
For example, if the instruction changes 8 pulses and the motor is required to rotate 5 pulses, then set
F21.34=5 and F21.35=8.
★
: Attention:
If the position feedback encoder is not installed on the motor shaft, the correct setting of F08.27 (motor to
encoder speed ratio) is needed to ensure the normal operation of PG vector control, and the molecule and
denominator of the electronic gear ratio are set correctly according to the change ratio of the given pulse and
the feedback pulse.
F21.36
feed forward gain
Range
：
0.000
～
7.000
Default
：
1.000
When the frequency of the command pulse changes, if the follow-up of the feedback pulse lags,
please gradually increase the feed-forward gain. On the contrary, please gradually reduce the
feed-forward gain. Normally no adjustment is needed. If adjustment is needed, please fine-tune near
the factory value.
F21.37
Feedforward filtering
time
Range
：
0.000
～
7.000s
Default
：
0.001s
The instruction pulse signal is filtered. Long filtering time leads to good anti-jamming performance,
but position tracking may lag behind.
。
F21.38
Position offset change
rate
Range
：
0
～
9999
Default
：
800
