Mitsubishi Electric FR-A820-00046 Instruction Manual page 496

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(H) Protective function parameter
Disabling the stall prevention operation and fast-response current limit according to operating
conditions (Pr. 156)
Referring to the table below, enable/disable the stall prevention operation and the fast-response cur-
rent limit operation, and also set the operation at OL signal output.
Fast response
Pr. 156
current limit
: enabled
setting
: disabled
0
(initial value)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
100
Tab. 5-120:
Setting of parameter 156
When "operation stop at OL signal output" is selected, the fault output "
stall prevention) is displayed, and operation stops.
The OL signal and E.OLT are not output because fast-response current limit and stall prevention
are not operating.
Setting values "100, 101" can be individually set for power driving and regenerative driving. The
setting value "101" disables the fast-response current limit during power driving.
NOTES
When the load is heavy or the acceleration/deceleration time is short, stall prevention operates
and acceleration/deceleration may not be performed according to the time set. In such case, set
the Pr. 156 and the stall prevention operation level to the optimum values.
For lift applications, make settings to disable the fast-response current limit. Otherwise, the torque
may be insufficient, causing the load to drop.
5 - 316
Stall prevention
operation selection
OL signal
: enabled
output
: disabled
:
operation
continued
:
operation
stopped
Fast response
Pr. 156
current limit
: enabled
setting
: disabled
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
101
Parameters
Stall prevention
operation selection
OL signal
: enabled
output
: disabled
:
operation
continued
:
operation
stopped
" (stop due to

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