MITSUBISHI ELECTRIC FR-S520 - Manual (Page 77)

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2
.3.12 Stall prevention function and current limit function
You can make settings to disable stall prevention caused by overcurrent and to
disable the fast-response current limit (which limits the current to prevent the
inverter from resulting in an overcurrent trip if an excessive current occurs due to
sudden load variation or ON-OFF, etc. in the output side of the running inverter).
•
Stall prevention
If the current exceeds the limit value, 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".
Stall
Prevention
Operation
Selection
:
Activated
: Not
activated
Stall
Prevention
Operation
Selection
:
Activated
: Not
activated
Pr. 21
Set-
ting
Fast-
Response
Current
Limit
:
Activated
: Not
activated
A
c
cel
er
at
io
n
Const
a
nt
s
p
ee
d
Decel
er
at
io
n
OL Signal
Output
:
Operation
continued
:
Operation
not
continued
(*)
Pr. 21
Set-
ting
Fast-
Response
Current
Limit
:
Activated
: Not
activated
A
c
cel
er
at
io
n
Const
a
nt
s
p
ee
d
Decel
er
at
io
n
OL Signal
Output
:
Operation
continued
:
Operation
not
continued
(*)
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 31
D
riv
in
g
100
Rege
ner
at
iv
e