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Main Setup [200]
11-2-5 Motor Protection [230]
98
Communication information
Modbus Instance no/
DeviceNet no:
Profibus slot/index
EtherCAT index (hex)
Fieldbus format
Modbus format
Note For a 1024 pulse encoder [22F] will count 1024 * 4 = 4096 pulse per turn.
This function protects the motor against overload based on the standard
IEC60947-4-2.
2
Motor I
t Type [231]
The motor protection function makes it possible to protect the motor from
overload as published in the standard IEC 60947-4-2. It does this using Motor
I2t Current, [232] as a reference. The Motor I2t Time [233] is used to define
the time behaviour of the function. The current set in [232] can be delivered
infinite in time. If for instance in [233] a time of 1000 s is chosen the upper
curve of Fig. 65 is valid. The value on the x-axis is the multiple of the current
chosen in [232]. The time [233] is the time that an overloaded motor is
switched off or is reduced in power at 1.2 times the current set in [232].
Default:
Off
Trip
Limit
Communication information
Modbus Instance no/
DeviceNet no:
Profibus slot/index
EtherCAT index (hex)
Fieldbus format
Modbus format
Note When Mot I2t Type=Limit, the VSD can control the speed < MinSpeed to
reduce the motor current.
2
Motor I
t Current [232]
Sets the current limit for the motor I
Default:
Range:
42912
168/71
4b60
Long, 1=1 quad encoder pulse
Int
2
231 Mot I
t Type
Stp M1:
A
Trip
2
0
I
t motor protection is not active.
2
When the I
t time is exceeded, the VSD will trip on "Motor
1
2
I
t".
This mode helps to keep the inverter running when the
Motor I2t function is just before tripping the VSD. The trip is
replaced by current limiting with a maximum current level
2
set by the value out of the menu [232]. In this way, if the
reduced current can drive the load, the VSD continues run-
ning.
43061
168/220
4bf5
UInt
UInt
2
t protection.
2
232 Mot I
t Curr
Stp
A
100% of I
MOT
0–150% of I
(set in menu [
MOT
Section 11-2
Trip
100%
224
])
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