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84
Explanation of functions (parameters)
2.3.12 Stall prevention function and current limit function
(Pr. 21
)
You can make setting to prevent stall caused by overcurrent and/or to prevent the
inverter from resulting in an overcurrent trip (to disable fast-response current limit
that limits the current) when an excessive current flows due to sudden load
fluctuation or ON-OFF on the output side of a running inverter.
•
Stall prevention
If the current exceeds the stall prevention operation level (Pr.22), the output
frequency of the inverter is automatically varied to reduce the current.
•
Fast-response current limit
If the current exceeds the limit value, the output of the inverter is shut off to
prevent an overcurrent.
Parameter
Name
Factory
Setting
Setting
Range
Remarks
21
Stall prevention
function selection
0
0 to 31, 100 Setting is enabled when Pr. 30 =
"1".
Pr. 21
Setting
Fast-
Response
Current
Limit
:
Activated
: Not
activated
Stall
Prevention
Operation
Selection
:
Activated
: Not
activated
OL Signal
Output
:
Operation
continued
:
Operation
not
continued
(*1)
Pr. 21
Setting
Fast-
Response
Current
Limit
:
Activated
:Not
activated
Stall
Prevention
Operation
Selection
:
Activated
:Not
activated
OL Signal
Output
:
Operation
continued
:
Operation
not
continued
(*1)
Ac
ce
le
ra
tion
Co
n
st
ant
spe
ed
De
ce
le
ra
tion
Ac
ce
le
ra
tion
Co
n
st
ant
spe
ed
De
ce
le
ra
tion
0
16
1
17
2
18
3
19
4
20
5
21
6
22
7
23
8
24
9
25
10
26
11
27
12
28
13
29
14
30
15
⎯
(*2)
31
⎯
(*2)
*1 When "Operation not continued for OL
signal output" is selected, the "OLT" alarm
code (stopped by stall prevention) is
displayed and operation stopped.
(Alarm stop display "
")
*2 Since both fast response current limit and
stall prevention are not activated, OL signal
and OLT are not output.
10
0
D
riv
in
g
R
egene ra
tive
⎯
(*2)
Содержание FR-S500 Series
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