Velocity Edge GX440 Operations Instructions Page 342

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Functions, monitoring, and protective functions
9.4 Extended functions
Drive converter cabinet units
342 Operating Instructions, 10/2008, A5E00288214A
9.4 Extended functions
9.4.1 Technology controller
Description
The "technology controller" function module allows simple control functions to be
implemented, e.g.:
Liquid level control
Temperature control
Dancer position control
Pressure control
Flow control
Simple control without higher-level control
Tension control
The technology controller features:
Two scalable setpoints
Scalable output signal
Separate fixed values
Separate motorized potentiometer
The output limits can be activated and deactivated via the ramp-function generator.
The D component can be switched to the system deviation or actual value channel.
The motorized potentiometer of the technology controller is only active when the drive
pulses are enabled.
The technology controller is designed as a PID controller, whereby the differentiator 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
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 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 TM31.
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