Emerson PACMotion VFD Series User Manual page 67

Par Parameter Name
P4-07 Maximum torque / current limit
When operating in Vector Speed or Vector Torque motor control modes (P4-01 = 0 or 1), this parameter
defines the maximum torque limit or reference used by the drive in conjunction with P4-06.
When operating in V/F Mode (P4-01 = 2), this parameter defines the maximum output current the drive will
provide to the motor before reducing the output frequency to attempt to limit the current.
P4-08 Minimum output torque
Active only in Vector Speed or Vector Torque motor control modes (P4-01 = 0 or 1). Sets a minimum torque
limit, whereby when the PACMotion VFD is enabled, it will always attempt to maintain this torque on the
motor at all times whilst operating.
NOTE This parameter should be used with extreme care, as the drive output frequency will increase to
achieve the torque level, and may exceed the selected speed reference.
P4-09 Maximum braking torque
Active only in Vector Speed or Vector Torque motor control modes (P4-01 = 0 or 1). Sets the maximum
regenerating torque allowed by the PACMotion VFD.
P4-10 V/F adjustment frequency
When operating in V/F mode (P4-01 = 2), this parameter in conjunction with P4-11 sets a frequency point at
which the voltage set in P4-11 is applied to the motor. Care must be taken to avoid overheating and damaging
the motor when using this feature.
P4-11 V/F adjustment voltage
Used in conjunction with parameter P4-10.
P4-12 Thermal overload retention
0 Disabled
1 Enabled
P4-13 Output phase sequence
0 U,V,W
1 U,W,V
P4-14 Thermal overload reaction
0 Trip
1 Current
Limit
Reduction
P4-15 Master mode configuration
0 Motor speed
& torque
reference
1 Speed
reference &
motor torque
GFK-3111A
All PACMotion VFDs feature electronic thermal overload protection for the connected
motor, designed to protect the motor against damage. An internal overload
accumulator monitors the motor output current over time, and will trip the drive if the
usage exceeds the thermal limit. When P4-12 is disabled, removing the power supply
from the drive and re-applying will reset the value of the accumulator. When P4-12 is
enabled, the value is retained during power off.
Stand motor phase sequence. Typically, this provides clockwise rotation of the motor.
Reverse motor phase sequence. Typically this provides counter-clockwise rotation of
the motor.
When the overload accumulator reaches the limit, the drive will trip on It.trp to prevent
damage to the motor.
When the overload accumulator reaches 90% of, the output current limit is internally
reduced to 100% of P1-08 in order to avoid an It.trp. The current limit will return to the
setting in P4-07 when the overload accumulator reaches 10%.
In this mode, when the drive functions as a Master in Master-Slave Mode, the data
broadcast on the drive network is the Master Actual Speed and the Master Torque
Reference. This mode is suitable for Master-Slave applications which required speed
following.
In this mode, when the drive functions as a Master in Master-Slave Mode, the data
broadcast on the drive network is the Master Speed Reference and the Master Actual
Torque. This mode is suitable for Master-Slave applications which required load sharing
between multiple drives.
PACMotion VFD AC Variable Speed Drive User Guide
Minimum Maximum Default
P4-08 500
P4-08 150
0.0 500
0.0 P1-09
0 P1-07
0 1
0 1
0 1
0 1
Units
150 %
0 %
100 %
0.0 Hz
0 V
1 -
0 -
0 -
0 -
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