Siemens SINAMICS G150 Operating Instructions Manual page 550

Functions, monitoring, and protective functions
9.3 Extended functions
A value of 0 deactivates the corresponding component. Setpoints can be specified via two
connector 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 actual 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 fieldbus (e.g. PROFIBUS, PROFINET).
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 TM31.
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 is only activated if p2274 > 0.
Note
Ramp-up/down time freeze
With the entry "0" sec. as power up time or ramp-down time for the ramp function generator
of the technology controller, the current values of the respective ramp function generator will
be frozen.
Commissioning
The "technology controller" function module can be activated by running the commissioning
wizard. Parameter r0108.16 indicates whether the function module has been activated.
Example: liquid level control
The objective here is to maintain a constant level in the container.
This is carried out by means of a variable-speed pump in conjunction with a sensor for
measuring the level.
The level is determined via an analog input (e.g. AI0 TM31) and sent to the technology
controller. The level setpoint is defined in a fixed setpoint. The resulting controlled variable is
used as the setpoint for the speed controller.
In this example, a Terminal Module (TM31) is used.
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Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A