Mitsubishi Electric 700 Series, Instruction Manual

Page: 95 / 416

84
Adjustment of the output torque (current) of the motor
(6) To further prevent a trip (Pr. 154)
⋅
When
Pr. 154
is set to "0", the output voltage reduces during stall prevention operation. By making setting to reduce
the output voltage, an overcurrent trip can further become difficult to occur.
⋅
Use this function where a torque decrease will not pose a problem.
(7) 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 fast-response current limit operation will be performed or not and
the operation to be performed at OL signal output.
*1 When "Operation not continued at signal output" is selected, the " " fault code (stopped by stall prevention) is displayed and operation
stopped.
*2 Since both fast-response current limit and stall prevention are not activated, OL signal and E.OLT are not output.
*3 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.
Pr. 154 Setting Description
0 Output voltage reduced
1
(initial value)
Output voltage not reduced
Pr. 156
Setting
Fast-response
Current Limit
: Activated
: Not
activated
Stall Prevention
Operation Selection
:Activated
:Not activated
OL Signal
Output
:Operation
continued
:Operation
not continued
*1
Pr. 156
Setting
Fast-response
Current Limit
:Activated
: Not
activated
Stall Prevention
Operation Selection
:Activated
:Not activated
OL Signal
Output
:Operation
continued
:Operation
not continued
*1
Acc
ele
rat
ion
Co
n
s
ta
n
t
sp
eed
Dec
ele
rat
ion
Acc
ele
rat
ion
Co
n
s
ta
n
t
sp
eed
Dec
ele
rat
ion
0
(initial
value)
16
1 17
2 18
3 19
4 20
5 21
6 22
7 23
8 24
9 25
10 26
11 27
12 28
13 29
14 30
15
⎯
*2
31
⎯
*2
100
*3
Driv
in
g
101
*3
Dr
iv
in
g
Rege
ner
at
io
n
⎯
*2
Rege
ner
at
io
n
⎯
*2
CAUTION
⋅
When the load is heavy, the elevator is predetermined, 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 drop due to gravity.