Emotron AB 01-3694-01r2 Functional Description 69
Motor Cos ϕ [227]
Set the nominal Motor cosphi (power factor).
Communication information
Motor ventilation [228]
Parameter for setting the type of motor ventilation. Affects
the characteristics of the I
2
t motor protection by lowering
the actual overload current at lower speeds.
Communication information
When the motor has no cooling fan, None is selected and
the current level is limited to 55% of rated motor current.
With a motor with a shaft mounted fan, Self is selected and
the current for overload is limited to 87% from 20% of syn-
chronous speed. At lower speed, the overload current
allowed will be smaller.
When the motor has an external cooling fan, Forced is
selected and the overload current allowed starts at 90% from
rated motor current at zero speed, up to nominal motor cur-
rent at 70% of synchronous speed.
Fig. 68 shows the characteristics with respect for Nominal
Current and Speed in relation to the motor ventilation type
selected.
Fig. 68 I
2
t curves
Motor Identification Run [229]
This function is used when the VSD is put into operation
for the first time. To achieve an optimal control perform-
ance, fine tuning of the motor parameters using a motor ID
run is needed. During the test run the display shows “Test
Run” blinking.
To activate the Motor ID run, select “Short” and press
RunL or RunR on the control panel. If menu [219] Rota-
tion is set to L the RunR key is inactive and vice versa. The
ID run can be aborted by giving a Stop command via the
control panel or Enable input. The parameter will automati-
cally return to OFF when the test is completed. The message
“Test Run OK!” is displayed. Before the VSD can be oper-
ated normally again, press the STOP/RESET key on the
control panel.
During the Short ID run the motor shaft does not rotate.
The VSD measures the rotor and stator resistance.
.
Communication information
Default: P
NOM
(see note section 11.3.3, page 67)
Range: 0.50 - 1.00
Modbus Instance no/DeviceNet no: 43047
Profibus slot/index 168/206
Fieldbus format
Long,
1=0.01
Modbus format EInt
Default: Self
None 0 Limited I
2
t overload curve.
Self 1
Normal I
2
t overload curve. Means that
the motor stands lower current at low
speed.
Forced 2
Expanded I
2
t overload curve. Means that
the motor stands almost the whole cur-
rent also at lower speed.
Modbus Instance no/DeviceNet no: 43048
Profibus slot/index 168/207
Fieldbus format UInt
Modbus format UInt
227 Motor Cosϕ
Stp M1:
A
228 Motor Vent
Stp M1: Self
A
Default: Off, see Note
Off 0 Not active
Short 1
Parameters are measured with injected
DC current. No rotation of the shaft will
occur.
Modbus Instance no/DeviceNet no: 43049
Profibus slot/index 168/208
Fieldbus format UInt
Modbus format UInt
1.00
0.90
0.87
0.55
0.20
0.70 2.00
xSync Speed
xI
nom
for I
2
t
Forced
Self
None
229 Motor ID-Run
Stp M1: Off
A
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