Inverter/Motor Protection - Siemens MICROMASTER 420 Operating Manual

6 Commissioning
Starting boost (entered in %)
P1312 =...
Voltage boost when starting (after an ON command) when using the linear or square-law
V/f characteristic as a % relative to P0305 (rated motor current) or P0350 (stator
resistance). The voltage boost remains active until
1) the setpoint is reached for the first time and
2) the setpoint is reduced to a value that is less than the instantaneous ramp-function
generator output.
Programmable V/f freq.
P1320 =...
coord. 1
Sets V/f coordinates
(P1320/1321 to P1324/1325) to
define V/f characteristic.
Programmable. V/f volt.
P1321 =...
coord. 1
Programmable V/f freq.
P1322 =...
coord. 2
Programmable V/f volt.
P1323 =...
coord. 2
Programmable U/f Freq.
P1324 =...
Koord. 3
Programmable V/f volt.
P1325 =...
coord. 3
Slip compensation (entered in %)
P1335 =...
Dynamically adjusts output frequency of inverter so that motor speed is kept constant
independent of motor load.
Resonance damping gain V/f
P1338 =...
Defines resonance damping gain for V/f.
6.2.14

Inverter/motor protection

Inverter overload reaction
P0290 =...
Selects reaction of inverter to an internal over-temperature.
0 Reduce output frequency
1 Trip (F0004)
2 Reduce pulse frequency and output frequency
3 Reduce pulse frequency then trip (F0004)
Inverter temperature warning
P0292 =...
Defines the temperature difference (in ºC) between the Overtemperature trip threshold and
the warning threshold of the inverter. The trip threshold is stored internally by the inverter
and cannot be changed by the user.
Motor cooling (enters the motor cooling system)
P0335 =...
0 Self-cooled: Using shaft mounted fan attached to motor
1 Force-cooled: Using separately powered cooling fan
2
Motor I t reaction
P0610 =...
Defines reaction when motor I
0 Warning, no reaction, no trip
1 Warning, I
2 Warning, no reaction, trip (F0011)
2
t time constant (entered in s)
Motor I
P0611 =...
The time until the thermal limit of a motor is reached, is calculated via the thermal time
constant. A higher value increases the time at which the motor thermal limit is reached. The
value of P0611 is estimated according to the motor data during quick commissioning or is
calculated using P0340 (Calculating of the motor parameters). When the calculation of
motor parameters during quick commission is complete the stored value can be replaced by
the value given by the motor manufacturer
22
0.0 Hz
V
max
r0071
V
P0304
0.0 Hz
P1325
0.0 Hz
P1323
0.0 Hz
P1321
P1310
0.0 Hz
0.0 Hz
P1310[V]
2
t reaches warning threshold.
reduction, trip F0011
max
V
V = f(V , M )
max dc max
n
f0 f1 f2 f3
0 Hz P1320 P1322 P1324
P1310[%] r0395[%]
= ⋅
100[%] 100[%]
Issue 04/04
0.0 %
f f f
n max
P0310 P1082
⋅
P0304[V ]
0.0 %
0.00
0
15 °C
0
2
100 s
MICROMASTER 420
Compact Operating Manual