0-89 Date and Time Readout
Range: Function:
0 N/A* [0 - 0 N/A] Displays the current date and time. The date and time is updated con-
tinuously.
The clock will not begin counting until a setting different from default has
been made in par.0-70
Date and Time.
Main Menu - Load and Motor - Group 1
General Settings, 1-0*
Define whether the adjustable frequency drive operates in open-loop or closed-loop.
1-00 Configuration Mode
Option: Function:
[0] * Open-loop 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 adjustable frequency drive is part of a
closed-loop control system based on an external PID controller providing
a speed reference signal as output.
[3] Closed-loop Motor speed will be determined by a reference from the built-in PID con-
troller varying the motor speed as part of a closed-loop control process
(e.g., constant pressure or flow). The PID controller must be configured
in par. 20-** or via the function set-ups accessed by pressing the [Quick
Menu] button.
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: Function:
[0] * Compressor torque
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.
[1] Variable torque
Variable Torque
[1]: For speed control of centrifugal pumps and fans. Also
to be used when controlling more than one motor from the same ad-
justable frequency drive (e.g., multiple condenser fans or cooling tower
fans). Provides a voltage which is optimized for a squared torque load
characteristic of the motor.
[2] Auto Energy Optim. CT
Auto Energy Optimization Compressor
[2]: For optimum energy-efficient
speed control of screw and scroll compressors. Provides a voltage that
is optimized for a constant torque load characteristic of the motor in the
entire range down to 15 Hz. 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 Cos-Phi. The parameter has a default value
which is automatically adjusted when the motor data is programmed.
4-22 TR200 Programming Guide
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