Siemens SINAMICS G120 Operating Instructions Manual page 291

● The technology controller supplies the main setpoint (p2251 = 0).
● The ramp-function generator output of the technology controller has not yet reached the
Setting the technology controller
Parameter
p2200 = 1
p1070 = 2294 Interconnect the main speed setpoint with the output of the technology controller.
p2253
p2264
p2257, p2258 Define the ramp-up and ramp-down times [s]
p2274
p2280
p2285
Advanced settings
Parameter
Limiting the output of the technology controller
In the factory setting, the output of the technology controller is limited to ± maximum speed. You must
change this limit, depending on your particular application.
Example: The output of the technology controller supplies the speed setpoint for a pump. The pump
should only run in the positive direction.
p2297 = 2291 Interconnect the upper limit with p2291.
p2298 = 2292 Interconnect the lower limit with p2292.
p2291
p2292
Manipulating the actual value of the technology controller
p2267, p2268 Limit the actual value
p2269
p2271
p2270
For further information refer to the function block diagrams 7950 ff of the List Manual.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
start value.
Remark
Enable technology controller.
Define the setpoint for the technology controller.
Example:
p2253 = 2224: The inverter interconnects the fixed setpoint p2201 with the setpoint of
the technology controller.
p2220 = 1: The fixed setpoint p2201 is selected.
Define the actual value for the technology controller.
Example: For p2264 = 755[0], analog input 0 is the source for the actual value.
Differentiation time constant [s]
The differentiation improves the rise time characteristics for very slow controlled
variables, e.g. a temperature control.
p2274 = 0: The differentiation is switched off.
Proportional gain K
Integral time T
Without an integral time, the controller cannot completely equalize deviations
between the setpoint and actual value.
p2285 = 0: The integral time is switched off.
Remark
Upper limit for the technology controller output e.g.: p2291 =100
Lower limit for the technology controller output e.g.: p2292 = 0
Scale the actual value
Invert the actual value
Actual value
P
[s]
N
Setting functions
8.7 Application-specific functions
291