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Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual Page 151

Transistorized inverter, high function & low acoustic noise.
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<Setting>
Refer to the following table and set the parameter as required:
Fast-Response
Current Limit
{
Pr. 156 Setting
...Activated
z
...Not activated
{
0
1
z
{
2
3
z
{
4
5
z
{
6
7
z
{
8
9
z
{
10
11
z
{
12
13
z
{
14
15
z
{
16
17
z
{
18
19
z
{
20
21
z
{
22
z
23
{
24
z
25
{
26
27
z
{
28
29
z
{
30
31
z
{
Driving
100
Regenerative
z
Driving
z
101
z
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")
Note 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.)
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.
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Stall Prevention
{
...Activated
z
...Not activated
Acceleration
Constant speed
{
{
{
{
{
z
{
z
{
z
{
z
z
z
z
z
{
{
{
{
{
z
{
z
{
z
{
z
z
z
z
z
{
{
{
{
{
z
{
z
{
z
{
z
z
z
z
z
{
{
{
{
{
z
{
z
{
z
{
z
z
z
z
z
{
{
z
z
{
{
z
z
CAUTION
138
PARAMETERS
OL Signal Output
{
...Operation continued
z
...Operation not
continued (Note 1)
Deceleration
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
{
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
z
{
{
{
z
{
{
{
z

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