User`s guide

128
CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter
Unit
Description / Notes
If the communication is re-established,E28 switches off
and the inverter does not change its status.
Actuation interval of the Serial Watchdog. If the value of
P314 is equal to 0, the Serial Watchdog function is
disabled. Otherwise, if the inverter does not receive any
valid message during this interval, it assumes the action
that has been programmed at P313.
P314
0.0 to 99.9
Serial Interface
[ 0.0 ]
WatchdogTimeout
0.1 s
P399
(1) (3)
50.0 to 99.9
Rated Motor
[ according to the
Efficiency
inverter model ]
0.1 %
Set this parameter according to motor nameplate.
If this data are not available:
-
If therated motor powerfactor is known
(cos

= P407),
determine the efficiencyby the following equation:
Where:
-
P
isthe motorpowerin(HP) (to convert HP toW multiply
by 750, i. e., 1 HP=750 W).
-
V
is the rated motor line voltage in Volts (V) – P400
-
I
is the rated motor current in Amperes (A) – P401
- For an approximation, use the values of the table in
item 9.3 of this manual.
It is used only in Vector Control mode.
6.3.4
Motor Parameters - P399 to P499
P399 =


nom
= 433 x
P
V
x
I
x
cos

P400
(1) (3)
0 to 600
Rated Motor
[ according to the
Voltage
inverter model
and
market ]
1 V
Rated motor voltage indicated on the motor nameplate.
It is the rms-value of the motor line voltage.
Set this parameter according to the motor nameplate
data and the connection diagram in the terminal box.
This parameter is used only in Vector Control mode.
P401
0.3xP295 to
Rated Motor
1.3xP295
Current
[ according to
the inverter
model ]
0.01 A (

9.99 A);
0.1 A (

10.0 A)
Rated motor current indicated on the motor nameplate.
It is the rms-value of the rated motor line current.
Set thisparameter accordingtothemotor nameplate data
and the connection diagram in the terminal box.
Thisparameter is used in V/F control
[
slip compensation
function and automatic torque
boost
function (automatic
IxR)]
and vectorcontrol.