Reference Variables; Groups Of Units; Options When Selecting The Technological Unit; Technological Unit Of The Technology Controller - Siemens SINAMICS G120XA Operating Instructions Manual

Advanced commissioning
6.2 Drive control

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 parameter
list. Example: r0065 is scaled with reference variable p2000.
If scaling is not specified in the parameter list, then the converter always shows/displays the
parameter unscaled.

Groups of units

The parameters associated with the selection of a physical unit, belong to different groups of
units.
For each parameter you can find the associated unit group for scaling in the parameter list.
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
parameter list.
6.2.7.2

Technological unit of the technology controller

Options when selecting the technological unit

p0595 defines in which technological unit the input and output variables of the technology
controller are calculated, e.g. [bar], [m³/min] or [kg/h].
Reference variable
p0596 defines the reference variable of the technological unit for the technology controller.
Unit group
Parameters involved with p0595 belong to unit group 9_1.
Additional information is provided in the parameter list.
Special features
You must optimize the technology controller after changing p0595 or p0596.
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Parameters (Page 349)
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
SINAMICS G120XA converter