Mitsubishi Electric FR-A520-0.4K Instruction Manual page 165

<Setting>
Refer to the following list and set the parameters:
High-Response
Current Limit
Pr. 156 Setting
...Not activated
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Driving
100
Regenerative
101 Driving
(Note 4) Regenerative
Note: 1. When "Operation not continued for OL signal output" is selected, the "E.OLT" alarm code
(stopped by stall prevention) is displayed and operation stopped.
(Alarm stop display "E.OLT")
2. If the load is heavy, the lift is predetermined, or the acceleration/deceleration time is short, the
stall prevention may be activated and the motor not stopped in the preset acceleration/
deceleration time. Therefore, set optimum values to the Pr. 156 stall prevention operation level.
(When the output voltage reduces during stall prevention operation, an overcurrent trip will be
less liable to occur but the torque decreases. Set "0" in Pr. 154 when the torque may be
reduced.)
3. In vertical lift applications, make setting so the high-response current limit is not cativated. Torque
may not be produced, causing a gravity drop.
4. At the setting of "101", the high-response current limit can be disabled in the driving mode as
compared to the setting of "100".
Always perform test operation.
Stall prevention operation performed during acceleration may increase the
acceleration time. Stall prevention operation performed during constant speed may
cause sudden speed changes.
Stall prevention operation performed during deceleration may increase the
deceleration time, increasing the deceleration distance.
Stall Prevention Operation Selection
...Activated
...Activated.
Acceleration
CAUTION
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...Not activated
Constant
Deceleration
speed
156
PARAMETERS
OL Signal Output
...Operation continued
...Operation not
continued (Note 1)