17.5.3.3 Limit Value Sources
The limitation of the frequency can be done by setting fixed values and by linking to
an analog input parameter. The analog value is limited via parameters Minimum
reference percentage
518 and Maximum reference percentage 519
consider the Gradient percentage ramp 477 of the reference percentage value chan-
nel.
The assignment is done for the torque controller via parameters Fre
quency upper
limit source 769 and Frequency lower limit source 770.
101 - Analog input MFI1A
The source is the multifunctional input 1 in ana-
log Operation mode 452.
110 - Fixed limit
The selected parameter values are taken into ac-
count to limit the speed controller.
201 - Inv. analog input MFI1A Operation mode 101, inverted.
210 - Inv. fixed limit value Operation mode 110, inverted.
17.5.3.4 Switching over between speed control and torque control
Via the signal assigned to parameter n-/T-Control Change-Over 164, you can switch
between speed control and torque control. See chapter 15.4.6 “n-/M Control Change-
06/13 Operating Instructions ACU 231
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