Siemens SINAMICS S120 Function Manual page 412

Function modules
7.1 Technology controller
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.
Commissioning with STARTER
The "technology controller" function module can be activated via the commissioning wizard.
You can check the actual configuration in parameter r0108.16.
Application example: 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 on TB30) 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 Board 30 (TB30) is used.
Figure 7-1
410
Level control: Application
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions