Characteristics
If you change the analog input type using p0756, then the inverter automatically selects the
appropriate scaling of the analog input. The linear scaling characteristic is defined using two
points (p0757, p0758) and (p0759, p0760). Parameters p0757 … p0760 are assigned to an
analog input via their index, e.g. parameters p0757[0] … p0760[0] belong to analog input 0.
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Figure 6-3
Examples for scaling characteristics
Parameter
Description
p0757
x coordinate of the 1st characteristic point [p0756 defines the unit]
p0758
y coordinate of the 1st characteristic point [% of p200x]
p200x are the parameters of the reference variables, e.g. p2000 is the reference speed
p0759
x coordinate of the 2nd point characteristic point [p0756 defines the unit]
p0760
y coordinate of the 2nd characteristic point [% of p200x]
p0761
Wire breakage monitoring response threshold
Adapting the characteristic
You must define your own characteristic if none of the default types match your particular
application.
Application example
The inverter should convert a 6 mA … 12 mA signal into the value range ‑100 % … 100 % via
analog input 0. The wire break monitoring of the inverter should respond when 6 mA is fallen
below.
Requirement
You have set analog input 0 as a current input ("I") via the DIP switch on the
Control Unit.
,
8
Advanced commissioning
6.3 Adapt the default setting of the terminal strip
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
167
