Monitoring Facilities; Motor Characteristics; Voltage/Frequency Characteristic - Siemens 6SE2101–1AA01 Operating Manual

The output frequency of the inverter, and hence the speed of the motor, can be controlled by any of the following
means (see 5.3.2, parameter P04 and also Figure 3) :
(1) Connection of 0–10 V control voltage (terminals X11.7/8).
(2) Connection of a 0–20 mA current loop control input (terminals X11.9/10).
(3) Connection of a 4–20 mA current loop control input (terminals X11.9/10).
(4) Connection of a 5 kΩ control potentiometer (terminals X11.6/7/8).
(5) By digital parameterisation via the push–buttons fitted to the inverter, or via equivalent external
push–buttons connected to terminals X11.17 and X11.18.
(6) Via the serial I/O connection (see section 7) .

1.3 Monitoring Facilities

The following monitoring facilities are available:
(1) Seven–segment display for output frequency, output current, fault indication or parameterisation.
This is viewed through a window in the cover.
(2) A 0–10 V analogue signal, proportional to output frequency or output current.
(3) A changeover relay, normally energised when the drive is connected to a suitable input supply. The
relay is de–energised when a fault (see section 5) is indicated.
(4) The drive may be interrogated via the serial I/O connection (see section 7) .

1.4 Motor Characteristics

The inverter can be adjusted to suit individual motor characteristics in the ways described in 1.4.1 and 1.4.2.

1.4.1 Voltage/Frequency Characteristic

Six voltage/frequency characteristic curves are available plus one programmable curve (see Figure 2) . They are
intended for the following applications:
Curve 0: V /50 Hz (constant torque)
N
For standard 50 Hz induction motors with linear speed/torque characteristics.
Curve 1: V /60 Hz (constant torque)
N
For standard 60 Hz induction motors with linear speed/torque characteristics.
Curve 2: V /87 Hz (constant torque)
N
For delta–connection of standard induction motors designed for star–connection of 50 Hz input
voltage. This increases the speed range over which constant motor torque can be achieved.
Curve 3: V /120 Hz (constant torque)
N
For applications where a constant torque is required over the full operating speed range 0.1 to
120 Hz.
Curve 4: V /50 Hz (torque proportional to speed
N
For operation of 50 Hz motors driving loads where torque is proportional to (speed)
examples of such loads are fans and pumps.
Curve 5: V /60 Hz (torque proportional to speed
N
For operation of 60 Hz motors driving loads where torque is proportional to (speed)
Curve 6: Programmable (not shown in Figure 2)
The curve type and corner frequency may be selected by the user.
1/3
1.5
)
1.5
)
English
1.5
. Typical
1.5
.