Functions, monitoring, and protective functions9.3 Extended functionsInverter chassis unitsOperating Instructions, 07/2016, A5E00331449A 451A value of 0 deactivates the corresponding component. Setpoints can be specified via twoconnector 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 channeleach have a smoothing element. The smoothing time can be set via parameters p2261 andp2265.The setpoints can be specified via separate fixed setpoints (p2201 to p2215), the motorizedpotentiometer, 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 belimited via parameters p2291 and p2292 and interconnected as required via a connectoroutput (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 thesetpoint/actual value difference (p2263 = 1) unlike in the factory setting. This is alwaysnecessary when the D component is to be effective, even if the reference variable changes.The D component is only activated if p2274 > 0.NoteRamp-up/down time freezeWith the entry "0" sec. as power up time or ramp-down time for the ramp function generatorof the technology controller, the current values of the respective ramp function generator willbe frozen.CommissioningThe "technology controller" function module can be activated by running the commissioningwizard. Parameter r0108.16 indicates whether the function module has been activated.Example: liquid level controlThe 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 formeasuring the level.The level is determined via an analog input (e.g. AI0 TM31) and sent to the technologycontroller. The level setpoint is defined in a fixed setpoint. The resulting controlled variable isused as the setpoint for the speed controller.In this example, a Terminal Module (TM31) is used.
