4-164
(2)
AI1 signal filtering time
(04-01)
(3)
AI2 signal filtering time
(04-06)
All analog inputs (AI1, AI2) have a 1
st
order programmable input filter that can be adjusted when noise is present
on each of the incoming analog signal to prevent erratic drive control.
The filter time constant (range: 0.00 to 2.00 seconds) is defined as the time that the input step signal reaches 63%
of its final value.
Note:
Increasing the filter time causes the drive operation to become more stable but less responsive to change
to the analog input.
Unfiltered
signal
Filtered
signal
Filter time constant (04-01)
63
100
%
t
Figure 4.4.37 Filter time constant
(4) AI2 function setting (04-05)
AI2 is multi-function analog input terminal function selection. Refer to Table 4.4.11 for function overview.
Table 4.4.11 Multi-function analog input list (04-05 setting)
Setting
Function
Description
Control mode
Name
Screen display
V/F
V/F
+
PG
SLV SV
PM
SV
PM
SLV
SLV2
0
Auxiliary
frequency
AUX.Freq Ref
Max Output Frequency (01-02, Fmax) =
100%
O
O
O
O
O
O
O
1
Frequency
Reference Gain
(FGAIN)
Freq Ref Gain
Aggregated gain
＝
AI1 = 04-02 * FGAIN
O
O
O
O
O
O
O
2
Frequency
Reference bias
(FBIAS)
Freq Ref Bias
Aggregated bias
＝
AI1 = 04-03 * FBIAS
O
O
O
O
O
O
O
3
Output Voltage
Bias (VBIAS)
Output Volt Bias
Aggregate output voltage =V/F curve
v VBIAS
O
O
X
X
O
O
O
4
Coefficient of
acceleration and
deceleration
reduction (K)
Tacc/Tdec Scaling
Actual acceleration and deceleration time
= acceleration and deceleration time
O
O
O
O
O
O
O
5
DC braking
current
DC Inj Current
Adjust the DC braking current (0 ~ 100%)
based on analog input. When the inverter
rated current = 100%, DC braking current
07-07 is disabled.
O
O
O
X
O
X
O
6
Over-torque
detection level
Over Tq Level
Change over-torque detection level
based on over-torque detection level, at
this time, 08-15 is disabled.
O
O
O
O
O
O
O
7
Stall prevention
Level During
Running
Run Stall Level
Adjust the action level (30% ~ 200%) of
stall prevention in operation based on
analog input. The inverter rated current
=100%.
O
O
X
X
O
X
O