Changing Stall Prevention Level During Operation Using An Analog Input; Using Frequency Detection - YASKAWA Varispeed F7 Instruction Manual

Changing Stall Prevention Level during Operation Using an Analog Input

If you set H3-09 (Multi-function Analog Input Terminal A2 Function Selection)
Analog Input Terminal A3 Function Selection)
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
level or the set value in constant L3-06, whichever is the smaller.
Fig 6.38 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.
INFO

Using Frequency Detection

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.
Con-
Name
stant
Number
Effective when "Desired fre-
quency (ref/setting) agree 1,"
Speed agree- "Frequency detection 1," or
L4-01 ment detec- "Frequency detection 2" is set
tion level for a multi-function output.
Frequencies to be detected are
set in Hz units.
Effective when "Frequency
(speed) agree 1," "Desired fre-
quency (speed) agree 1," or
Speed agree- "Frequency (FOUT) detection
L4-02 ment detec- 1," Frequency (FOUT) detection
tion width 2 is set for a multi-function out-
put.
Sets the frequency detection
width in Hz units.
to 8 (stall prevention level during run), you can change the
Stall prevention level during operation
(4 mA) (8.8 mA) (20 mA)
Setting
Description
Range
0.0 to
*1
400.0
0.0 to
*2
300.0
0.0 to
20.0
or H3-05 (Multi-function
Multi-function analog input
terminal A2, A3 input level
Control Methods
Change
Open
Factory during
V/f
Loop
Setting Opera-
V/f with
Vec-
tion
PG
0.0 Hz No A A
2.0 Hz No A A
Machine Protection
or A3 input
MEMO
BUS
Flux
Regis-
Vec-
ter
tor
tor
A A 499H
A A 49AH
6-
53