Siemens MICROMASTER 420 - Page 146

3 Functions Issue 07/04
MICROMASTER 420 Operating Instructions
146 6SE6400-5AA00-0BP0
Parameter Voltage boost Explanation
Vmax
Vn
(P0304)
V
AccBoost,100
0
fn
(P0310)
fmax
(P1082)
f
V
f
Boost,end
(P1316)
V
AccBoost,50
Boost
N
o
r
m
a
l
V
/
f
(
P
1
3
0
0
=
0
)
actual V
O
u
t
p
u
t
v
o
lt
a
g
e
OFF
ON
t
t
f
P1311 active
t0
1
Boost voltage Validity range
\\erlf305a\Graphics_PLI\Images\p1311_MM420.vsd
P1312 Voltage boost when starting The voltage boost is only effective when accelerating
for the first time (standstill)
OFF
ON
t
t
f
P1312 active
t0
1
Vmax
Vn
(P0304)
V
StartBoost,100
0
fn
(P0310)
fmax
(P1082)
f
V
f
Boost,end
(P1316)
V
StartBoost,50
Boost
Boost voltage
N
o
r
m
a
l
V
/
f
(
P
1
3
0
0
=
0
)
actual V
O
u
t
p
u
t
v
o
l
t
a
g
e
Validity range
\\erlf305a\Graphics_PLI\Images\p1312_MM420.vsd
NOTE
 Especially at low frequencies, the motor temperature is additionally increased
as a result of the voltage boost (the motor overheats) !
 The voltage value at 0 Hz is determined from the product of rated motor current
P0305, stator resistance P0350 and the appropriate parameters P1310 –
P1312.