Main Menu - Load And Motor - Group 1 - Trane TR200 Series Programming Manual

Parameter Description

Main Menu - Load and Motor - Group 1

General Settings, 1-0*
Define whether the frequency converter operates in open loop or closed loop.
1-00 Configuration Mode
Option:
[0] * Open Loop
[3] Closed Loop
NOTE: This parameter cannot be changed when motor is running.
NOTE: When set for Closed Loop, the commands Reversing and Start Reversing will not reverse the direction
of the motor.
1-03 Torque Characteristics
Option:
[0] * Compressor torque
[1] Variable torque
[2] Auto Energy Optim. CT
[3] * Auto Energy Optim. VT
58
Function:
Motor speed is determined by applying a speed reference or by setting
desired speed when in Hand Mode.
Open Loop is also used if the frequency converter is part of a closed loop
control system based on an external PID controller providing a speed
reference signal as output.
Motor Speed will be determined by a reference from the built-in PID
controller varying the motor speed as part of a closed loop control proc-
ess (e.g. constant pressure or flow). The PID controller must be config-
ured in par. 20-** or via the Function Setups accessed by pressing the
[Quick Menus] button.
Function:
Compressor
[0]: For speed control of screw and scroll compressors. Pro-
vides a voltage which is optimized for a constant torque load character-
istic of the motor in the entire range down to 10 Hz.
Variable Torque
[1]: For speed control of centrifugal pumps and fans. Also
to be used when controlling more than one motor from the same fre-
quency converter (e.g. multiple condenser fans or cooling tower fans).
Provides a voltage which is optimized for a squared torque load charac-
teristic of the motor.
Auto Energy Optimization Compressor
speed control of screw and scroll compressors. Provides a voltage which
is optimized for a constant torque load characteristic of the motor in the
entire range down to 15Hz but in addition the AEO feature will adapt the
voltage exactly to the current load situation, thereby reducing energy
consumption and audible noise from the motor. To obtain optimal per-
formance, the motor power factor cos phi must be set correctly. This
value is set in par.14-43 Motor
which is automatically adjusted when the motor data is programmed.
These settings will typically ensure optimum motor voltage but if the
motor power factor cos phi requires tuning, an AMA function can be
carried out using par.1-29
rarely necessary to adjust the motor power factor parameter manually.
Auto Energy Optimization VT
trol of centrifugal pumps and fans. Provides a voltage which is optimized
for a squared torque load characteristic of the motor but in addition the
AEO feature will adapt the voltage exactly to the current load situation,
thereby reducing energy consumption and audible noise from the motor.
To obtain optimal performance, the motor power factor cos phi must be
set correctly. This value is set in par.14-43
has a default value and is automatically adjusted when the motor data is
[2]: For optimum energy efficient
Cosphi. The parameter has a default value
Automatic Motor Adaptation
[3]: For optimum energy efficient speed con-
Motor Cosphi. The parameter
TR200 Programming Guide
(AMA). It is very