Mitsubishi Electric FR-E560 Series Instruction Manual page 95

<Setting of stall prevention operation level>
• In Pr. 22, set the stall prevention operation level. Normally set it to 150% (factory
setting). Set "0" in Pr. 22 to disable the stall prevention operation.
• To reduce the stall prevention operation level in the high-frequency range, set the
reduction starting frequency in Pr. 66 and the reduction ratio compensation factor in
Pr. 23.
Formula for stall prevention operation level
Stall prevention operation level (%) = A + B × [
Pr. 66 (Hz) × Pr. 22 (%)
where, A =
output frequency (Hz)
• By setting "9999" (factory setting) in Pr. 23, the stall prevention operation level is
constant at the Pr. 22 setting up to 400Hz.
<Setting of stall prevention operation selection>
Refer to the following table and set the parameter.
Stall Prevention
Operation
Selection
High-
Response
Current
Pr. 156
Limit
Setting
: Activated
: Not
activated
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OL Signal
Output
: Activated :
Operation
: Not activated
continued
:
Operation
not
continued
(Note 1)
Pr. 22-A
Pr. 22-B
Pr. 66 (Hz) × Pr. 22 (%)
, B =
400Hz
High-
Response
Current
Pr. 156
Limit
Setting
: Activated
: Not
activated
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
100
85
PARAMETERS
Pr. 23-100
] × [
]
100
Stall Prevention
OL Signal
Operation
Output
Selection
: Activated :
Operation
: Not activated
continued
:
Operation
not
continued
(Note 1)
4