Emerson PACMotion VFD Series User Manual page 66

Group 4 Parameter Listing
WARNING
Incorrect adjustment of parameters in menu group 4 can cause unexpected behaviour of the motor and any
connected machinery. It is recommended that these parameters are only adjusted by experienced users.
Table 38: Parameter Group 4 - Listing
Par Parameter Name
P4-01 Motor type and control mode
Setting Motor
Type
0 IM
1 IM
2 IM
3 AC PM
4 AC PM
5 BLDC
6 Syn RM
P4-02 Motor parameter autotune
When set to 1, the drive immediately carries out a non-rotating autotune to measure the motor parameters
for optimum control and efficiency. Following completion of the autotune, the parameter automatically
returns to 0.
P4-03 Speed control P-gain
Sets the proportional gain value for the speed controller when operating in Vector Speed or Vector Torque
motor control modes (P4-01 = 0 or 1). Higher values provide better output frequency regulation and
response. Too high a value can cause instability or even over current trips. For applications requiring best
possible performance, the value should be adjusted to suit the connected load by gradually increasing the
value and monitoring the actual output speed of the load until the required dynamic behaviour is achieved
with little or no overshoot where the output speed exceeds the setpoint.
In general, higher friction loads can tolerate higher values of proportional gain, and high inertia, low friction
loads may require the gain to be reduced.
P4-04 Speed control I time
Sets the integral time for the speed controller. Smaller values provide a faster response in reaction to motor
load changes, at the risk of introducing instability. For best dynamic performance, the value should be
adjusted to suit the connected load.
P4-05 Motor power factor
When operating in Vector Speed motor control modes, this parameter must be set to the motor nameplate
power factor.
P4-06 Torque reference / limit selection
0 Maximum torque
limit P4-07
1 Analog Input 1
2 Analog Input 2
3 Fieldbus
4 Master / Slave
5 PID output
66
Primary Control
Control Method
Speed Vector
Torque Vector
Speed V/F
Speed Vector
Torque Vector
Speed Vector
Speed Vector
The torque controller reference / limit is set in P4-07.
The output torque is controlled based on the signal applied to Analog Input
1, whereby 100% input signal level will result in the drive output torque
being limited by the value set in P4-07.
The output torque is controlled based on the signal applied to Analog Input
2, whereby 100% input signal level will result in the drive output torque
being limited by the value set in P4-07.
The output torque is controlled based on the signal from the
communications Fieldbus, whereby 100% input signal level will result in the
drive output torque being limited by the value set in P4-07.
The output torque is controlled based on the signal from the Emerson
Master / Slave, whereby 100% input signal level will result in the drive
output torque being limited by the value set in P4-07.
The output torque is controlled based on the output of the PID controller,
whereby 100% input signal level will result in the drive output torque being
limited by the value set in P4-07.
PACMotion VFD AC Variable Speed Drive User Guide
Minimum
0
Additional Information
Speed control with Torque Limit. Torque Limit Source selected
by P4-06.
Torque Control with Speed Limit. Torque reference selected by
P4-06.
Speed Limit defined by the Speed Reference.
V/F control for simple applications with standard IM Motors.
For speed control of AC PM motors with Sinusoidal back EMF.
For torque control of AC PM motors with Sinusoidal back EMF.
For speed control of BLDC motors with Trapezoidal back EMF.
For speed control of Synchronous Reluctance motors.
0
0.1
0.010
0.50
0
Maximum Default
6 2
1 0
400.0 50.0
2.000 0.050
0.99 -
5 0
Units
-
-
%
s
-
-
GFK-3111A