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Mitsubishi Electric FR-F700PJ Instruction Manual Page 104

Air-conditioning inverter.
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(7)
To further prevent a trip (Pr.154)
Set Pr.154 = "11" when the overvoltage protective function (E.OV
application with large load inertia. Note that turning OFF the start signal (STF/STR) or varying the frequency signal during
stall prevention operation may delay the acceleration/deceleration start.
(8)
Limit the stall prevention operation and fast-response current limit operation according to the
operating status (Pr. 156)
Refer to the following table and select whether stall prevention operation and fast-response current limit operation will be
performed or not and the operation to be performed at OL signal output.
Stall Prevention
Operation Selection
Fast-Response
: Activated
: Not activated
Current Limit
Pr. 156

Setting
: Activated
: Not activated
0
(initial
value)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
100


When "Operation not continued for OL signal output" is selected, the

Since stall prevention is not activated, OL signal and E.OLT are not output.

The settings "100" and "101" allow operations to be performed in the driving and regeneration modes, respectively. The setting "101" disables the fast-
response current limit in the driving mode.

OL signal is not output at fast-response current limit operation.

The fast-response current limit operation is disabled under IPM motor control.
NOTE
 When the load is heavy or the acceleration/deceleration time is short, stall prevention is activated and acceleration/
deceleration may not be made according to the preset acceleration/deceleration time. Set Pr. 156 and stall prevention
operation level to the optimum values.
 In vertical lift applications, make setting so that the fast-response current limit is not activated. Torque may not be
produced, causing a load drop due to gravity.
Adjustment of the output torque (current) of the motor
OL Signal
Output
:Operation
continued
: Operation
not continued

— 
— 
—
) activates during stall prevention operation in an
Stall Prevention
Operation Selection
Fast-Response
: Activated
: Not activated
Current Limit
Pr. 156

Setting
: Activated
: Not activated
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
101

fault (stopped by stall prevention) is displayed and operation is stopped.
OL Signal
Output
:Operation
continued
: Operation
not continued

— 
—
—
4
99

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