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Changing Stall Prevention Level during Operation Using an Analog Input
If you set H3-09 (Multi-function Analog Input Terminal A2 Function Selection) or H3-05 (Multi-function
Analog Input Terminal A3 Function Selection) to 8 (stall prevention level during run), you can change the stall
level during operation by setting H3-10 (Gain (Terminal A2)) and H3-11 (Bias (Terminal A2)) or H3-06 (Gain
(Terminal A3)) and H3-07 (Bias (Terminal A3).
The stall prevention level during operation enabled is the multi-function analog input terminal A2 or A3 input
level or the set value in constant L3-06, whichever is the smaller.
INFO
Using Frequency Detection: L4-01 to L4-05
Set these constants when outputting one of the frequency agree or frequency detection signals from a multi-
function output. When using flux vector control, the motor speed is detected.
User
Con-
stant
Number
L4-01
L4-02
L4-03
-48
6
Stall prevention level during operation
(4 mA) (8.8 mA) (20 mA)
Fig 6.37 Stall Prevention Level during Operation Using an Analog Input
If the motor capacity is smaller than the Inverter capacity or the motor stalls when operating at the factory set-
tings, lower the stall prevention level during operation.
Name
Description
Display
Speed agree
Set the speed that you want
detection
to detect in Hz.
level
The set speed is an absolute
value, so the speed is
Spd Agree
detected in forward or
Level
reverse.
Speed agree
detection
Set the speed detection
width
range in Hz.
Spd Agree
Width
Speed agree
Set the speed that you want
detection
to detect in Hz.
level (+/−)
Set positive values for for-
ward, negative values for
Spd Agree
reverse.
Lvl +−
Multi-function analog input
terminal A2, A3 input level
Change
Setting
Factory
during
Range
Setting
Operation
0.0 to
0.0 Hz
No
400.0
0.0 to
2.0 Hz
No
20.0
−400.0 to
0.0 Hz
No
+400.0
Valid Access Levels
Open-
V/f
V/f with
loop
Flux
Control
PG
Vector
Vector
1
A
A
A
A
A
A
A
A
A
A
A
A
Open-
loop
Vector
2
A
A
A
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