Invertek Compact 2 Series User Manual page 20

Par. Description
P-11 Low Frequency Torque Boost Current
Low Frequency Torque Boost is used to increase the applied motor voltage and hence current at low output frequencies. This can
improve low speed and starting torque. Increasing the boost level will increase motor current at low speed, which may result in the
motor temperature rising - force ventilation of the motor may then be required. In general, the lower the motor power, the higher
the boost setting that may be safely used.
For IM motors, when P-51 = 0 1 or 1, a suitable setting can usually be found by operating the motor under very low or no load
conditions at approximately 5Hz, and adjusting P-11 until the motor current is approximately the magnetising current (if known) or
in the range shown below.
Frame Size 1 : 60 – 80% of motor rated current
Frame Size 2 : 50 – 60% of motor rated current
Frame Size 3 : 40 – 50% of motor rated current
Frame Size 4 : 35 – 45% of motor rated current
This parameter is also effective when using alternative motor types, P-51 = 2, 3 or 4. In this case, the boost current level is defined as
4*P-11*P-08
P-12 Primary Command Source
Setting Function
0 Terminal Control
1 Uni-directional Keypad
Control
2 Bi-directional Keypad
Control
3 Modbus Network Control
4 Modbus Network Control
5 PI Control
6 PI Analog Summation
Control
7 CAN Control
8 CAN Control
9 Slave Mode
NOTE When P-12 = 1, 2, 3, 4, 7, 8 or 9, an enable signal must still be provided at the control terminals, digital input 1
P-13 Operating Mode Select
Setting Function
0 General Purpose
1 Pump Mode
2 Fan Mode
P-14 Extended Menu Access code
Enables access to Extended and Advanced Parameter Groups. This parameter must be set to the value programmed in P-37 (default:
101) to view and adjust Extended Parameters and value of P-37 + 100 to view and adjust Advanced Parameters. The code may be
changed by the user in P-37 if desired.
20
Optidrive Compact-2 Engineering Guide Issue 07.docx
Description
The drive responds directly to signals applied to the control terminals.
The drive can be controlled in the forward direction only using an external or remote
Keypad
The drive can be controlled in the forward and reverse directions using an external or
remote Keypad. Pressing the keypad START button toggles between forward and reverse.
Control via Modbus RTU (RS485) using the internal Accel / Decel ramps
Control via Modbus RTU (RS485) interface with Accel / Decel ramps updated via Modbus
User PI control with external feedback signal
PI control with external feedback signal and summation with analog input 1
Control via CAN (RS485) using the internal Accel / Decel ramps
Control via CAN (RS485) interface with Accel / Decel ramps updated via CAN
Control via a connected Invertek drive in Master Mode. Slave drive address must be > 1.
Description
Intended for most standard applications, parameters are configured for constant torque operation
with 150% overload allowed for 60 seconds, spin start is disabled.
Intended for pump applications, parameters are configured for variable torque operation with 110%
overload allowed for 60 seconds, spin start is disabled.
Intended for Fan applications, parameters are configured for variable torque operation with 110%
overload allowed for 60 seconds, spin start is enabled.
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Minimum Maximum Default
0.0 25.0
0 6
0 2
0 65535
Units
3.0 %
0 -
0 -
0 -