Scaling - Siemens sinamics G120 Operating Instructions Manual

6.7.12.4

Scaling

If you interconnect a physical quantity, e.g. speed or voltage to the input of a free function
block, then the inverter automatically scales the signal to a value of 1. The analog output
signals of the free function blocks are also scaled: 0 ≙ 0 %, 1≙ 100 %.
If you interconnect the output signal of a free function block with a function that requires
physical input quantities, then the inverter converts the scaled signal into the physical
quantity.
Scaling parameters of physical quantities
Speed
Voltage
Current
Torque
Power
Angle
Temperature 100 % ≙ p2006 reference temperature
The allocation of parameters and scaling parameters is provided in the parameter
description of the List Manual.
Limits
The inverter expects limits within the free function blocks as scaled values:
Scaled limit = physical limit value / value of the reference parameter
Converter with CU250S-2 Control Unit
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
100 % ≙ p2000 (reference speed)
Example: p2000 = 3000 rpm, actual speed 2100 rpm ⇒ the scaled input quan-
tity = 2100 / 3000 = 0.7.
100 % ≙ p2001 reference voltage
100 % ≙ p2002 reference current
100 % ≙ p2003 reference torque
100 % ≙ p2004 reference power
100 % ≙ p2005 reference angle
Example: p2006 = 100 °C, actual temperature = 120 °C. ⇒ the scaled input
quantity = 120 °C / 100 °C = 1.2.
Advanced commissioning
6.7 Application-specific functions
323