● p0505 = 3: US system of units
Torque [lbf ft], power [hp], temperature [°F]
● p0505 = 4: System of units, referred/US
Represented as [%]
Special features
The values for p0505 = 2 and for p0505 = 4 - represented in the converter - are identical.
However, the reference to SI or US units is required for internal calculations and to output
physical variables.
For variables, which cannot be represented as [%], then the following applies:
p0505 = 1 ≙ p0505 = 2 and p0505 = 3 ≙ p0505 = 4.
In the case of variables whose units are identical in the SI system and US system, and which
can be displayed as a percentage, the following applies:
p0505 = 1 ≙ p0505 = 3 and p0505 = 2 ≙ p0505 = 4.
Reference variables
There is a reference variable in the converter for most parameters with physical units. When
the referred representation [%] is set, then the converter scales the physical variables based
on the particular reference variable.
When the reference variable changes, then the significance of the scaled value also changes.
Example:
● Reference speed = 1500 rpm → fixed speed = 80 % ≙ 1200 rpm
● Reference speed = 3000 rpm → fixed speed = 80 % ≙ 2400 rpm
For each parameter you can find the associated reference variable for scaling in the List
Manual. Example: r0065 is scaled with reference variable p2000.
If scaling is not specified in the List Manual, then the converter always represents/displays the
parameter unscaled (not normalized).
Groups of units
The parameters associated with the selection of a physical unit, belong to different groups of
units.
You can find the associated group of units in the List Manual for each parameter. Example:
r0333 belongs to unit group 7_4.
An overview of the unit groups and the possible physical units can also be found in the List
Manual.
Overview of the manuals (Page 459)
Advanced commissioning
6.14 Selecting physical units
SINAMICS G120C converter
212
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
