Omron VARISPEED G7 Instruction Manual page 173

Speed Feedback Protection Control Functions: N2
User constants for speed feedback protection control functions are shown in the following table.
Con-
stant
Number
Speed feed-
back detec-
tion control
(AFR) gain
N2-01
AFR Gain
Speed feed-
back detec-
tion control
N2-02
(AFR) time
constant
AFR Time
Speed feed-
back detec-
tion control
N2-03
(AFR) time
constant 2
AFR Time 2
High-slip Braking: N3
User constants for high-slip braking are shown in the following table.
Con-
stant
Number
High-slip
braking
deceleration
frequency
N3-01
width
HSB Down
Freq
High-slip
braking cur-
rent limit
N3-02
HSB Current
-68
5
Name
Description
Display
Set the internal speed feed-
back detection control gain
using the multiplication func-
tion.
Normally, there is no need to
make this setting.
Adjust this constant as fol-
lows:
• If hunting occurs, increase
the set value.
• If response is low, decrease
the set value.
Adjust the setting by 0.05 at a
time, while checking the
response.
Set the time constant to
decide the rate of change in
the speed feedback detection
control.
Set the time constant to
decide the amount of change
in the speed.
Name
Description
Display
Sets the frequency width for
deceleration during high-slip
braking as a percent, taking
the Maximum Frequency
(E1-04) as 100%.
Sets the current limit for
deceleration during high-slip
braking as a percent, taking
the motor rated current as
100%. The resulting limit
must be 150% of the Inverter
rated current or less.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0.00 to
1.00 No No
10.00
0 to
50 ms No No
2000
0 to
750 ms No No
2000
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
1 to 20 5% No A
100 to
150% No A
200
MEMO
Open Open
BUS
V/f Loop Flux Loop
Regis-
with Vec- Vec- Vec-
ter
PG tor tor tor
1 2
No A No No 584H
No A No No 585H
No A No No 586H
MEMO
Open Open
BUS
V/f Loop Flux Loop
Regis-
with Vec- Vec- Vec-
ter
PG tor tor tor
1 2
A No No No 588H
A No No No 589H
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