Operating instructions

MM420 Parameter List 04/02
MICROMASTER 420 Parameter List
74 6SE6400-5BA00-0BP0
P1310 Continuous boost Min: 0.0
CStat: CUT Datatype: Float Unit: % Def: 50.0
P-Group: CONTROL Active: Immediately QuickComm. No Max: 250.0
At low output frequencies the output voltage is low to keep the flux level constant. However, the output
voltage may be too low
- for magnetisation the asynchronous motor
- to hold the load
- to overcome losses in the system. The output voltage can be increased using parameter P1310.
Defines boost level in [%] relative to P0305 (rated motor current) applicable to both linear and quadratic V/f
curves according to the diagram below:
Vmax
Vn
(P0304)
V
ContBoost,100
0
fn
(P0310)
f max
(P1082)
f
V
f
Boost,end
(P1316)
Boost
Linear V/f
O
ut
p
u
t
v
o
l
t
ag
e
actual V
No
rmal V/f
(
P13
0
0
=
0)
V
ContBoost,50
V
ContBoost,100
V
Vn
(P0304)
fn
(P0310)
fmax
(P1082)
Vmax
f
Boost,end
(P1316)
f
Boost
Quadratic V/f
O
u
t
p
u
t
v
o
l
t
a
g
e
actual V
N
o
r
m
a
l
q
u
a
d
r
a
t
i
c
(
P
1
3
0
0
=
2
)
0
V
ContBoost,50
where voltage values are given
V_ConBoost,100 = rated motor current (P0305) * Stator resistance (P0350) * Continous boost (P1310)
V_ConBoost,50 = V_ConBoost,100 / 2
Dependency:
Setting in P0640 (motor overload factor [%]) limits the boost.
Note:
The boost values are combined when continuous boost (P1310) used in conjunction with other boost
parameters (acceleration boost P1311 and starting boost P1312).
Level:
2