Technical data

Chapter 6 – Programming
Siemens Building Technologies, Inc. 47
For starting the motor when OFF3 is set, the binary input must be closed (high). If OFF3 is high,
the motor can start and stop by OFF1 and OFF2.
If OFF3 is low, the motor cannot be started.
Control Types (P1300)
The different control types of the SED2 control the relationship between the motor speed and the
voltage supplied by the SED2. Below is a summary of the available control types:
Linear V/f control, P1300=0
For variable or constant torque applications such as delivery systems and positive displacement
pumps.
Linear V/f control with flow control (FCC), P1300=1
This factory-set control mode can improve performance and dynamic behavior of the motor.
Parabolic V/f control, P1300=2
A factory-set control mode for variable torque load such as fans and pumps.
Multi-point V/f control, P1300=3
Linear V/f control with energy saving mode, P1300=4
Automatically increases or decreases the motor voltage to locate the lowest possible energy
consumption. As soon as the default setpoint speed is reached, the control mode is enabled.
V/f control for textile applications, P1300=5
For no slip compensation or resonance smoothing. The Imax controller relates to voltage instead
of frequency.
V/f control with FCC for textile applications, P1300=6
A combination of P1300 = 1 and P1300 = 5.
Communications
The SED2 includes an integral RS-485 serial interface. The optional door mounting kit for the
BOP/AOP includes an integral RS-232 interface. USS, P1, and N2 protocols are implemented as
part of the series. See Chapter 9 in this manual for more details.
SED2 HVAC Functions
PID Controller
To achieve independent control in a stand-alone SED2 application, Siemens Building
Technologies implemented a PID controller. This controller handles temperature (Ni 1000),
pressure, and speed control. Factory settings for the PID controller parameters are for pressure
control. For temperature or speed control, adjust the controller time constants for the new control
loop.