CG Emotron VFX Series User Manual

104 Functional Description CG Drives & Automation, 01-5326-01r5
11.4.5 Motor Protection [230]
This function protects the motor against overload based on
the standard IEC 60947-4-2.
Motor I
2
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. 95 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].
Communication information
Motor I
2
t Current [232]
Sets the current limit for the motor I
2
t protection in percent
of I
MOT
.
Communication information
Motor I
2
t Time [233]
Sets the time of the I
2
t function. After this time the limit for
the
I
2
t is reached if operating with 120% of the I
2
t current
value. Valid when start from 0 rpm.
Communication information
231 Mot I
2
t Type
Default: Trip
Off 0 I
2
t motor protection is not active.
Trip 1
When the I
2
t time is exceeded, the AC
drive will trip on “Motor I
2
t”.
Limit 2
This mode helps to keep the inverter
running when the Motor I2t function is just
before tripping the AC drive. The trip is
replaced by current limiting with a
maximum current level set by the value
out of the menu [232]. In this way, if the
reduced current can drive the load, the
AC drive continues running. If there is no
reduction in thermal load, the drive will
trip.
Modbus Instance no/DeviceNet no: 43061
Profibus slot/index 168/220
EtherCAT and CANopen index (hex) 4bf5
Profinet IO index 19445
Fieldbus format UInt
Modbus format UInt
NOTE: When Mot I2t Type=Limit, the AC drive can
control the speed < MinSpeed to reduce the motor
current.
232 Mot I
2
t Curr
Default: 100% of I
MOT
Range: 0–150% of I
MOT
(set in menu [224])
Modbus Instance no/DeviceNet no: 43062
Profibus slot/index 168/221
EtherCAT and CANopen index (hex) 4bf6
Profinet IO index 19446
Fieldbus format Long, 1=1%
Modbus format EInt
NOTE: When the selection Limit is set in menu [231],
the value must be above the no-load current of the
motor.
NOTE: Not the time constant of the motor.
233 Mot I
2
t Time
Default: 60 s
Range: 60–1200 s
Modbus Instance no/DeviceNet no: 43063
Profibus slot/index 168/222
EtherCAT and CANopen index (hex) 4bf7
Profinet IO index 19447
Fieldbus format Long, 1=1 s
Modbus format EInt

CG Emotron VFX Series Specifications

General

Brand	CG
Model	Emotron VFX Series
Category	Controller
Language	English