Description - Siemens SINAMICS S120 Function Manual

Extended Functions
"Technology controller" function module
4.1.3

Description

The technology controller is designed as a PID controller, whereby the differentia-
tor can be switched to the control deviation channel or the actual value channel
(factory setting). The P I, and D components can be set separately. A value of 0
deactivates the corresponding component. Setpoints can be specified via two con-
nector inputs. The setpoints can be scaled via parameters (p2255 and p2256). A
ramp-function generator in the setpoint channel can be used to set the setpoint
ramp-up/ramp-down time via parameters p2257 and p2258. The setpoint and ac-
tual value channel each have a smoothing element. The smoothing time can be set
via parameters p2261 and p2265.
The setpoints can be specified via separate fixed setpoints (p2201 to p2215), the
motorized potentiometer, or via the field bus (e.g. PROFIBUS).
Pre-control can be integrated via a connector input.
The output can be scaled via parameter p2295 and the control direction reversed.
It can be limited via parameters p2291 and p2292 and interconnected as required
via a connector output (r2294).
The actual value can be integrated, for example, via an analog input on the TB30.
If a PID controller has to be used for control reasons, the D component is switched
to the setpoint/actual value difference (p2263 = 1) unlike in the factory setting. This
is always necessary when the D component is to be effective, even if the reference
variable changes. The D component can only be activated when p2274 > 0.
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© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition