Siemens SINAMICS G130 Operating Instructions Manual page 421

● A separate parameter is available for selecting technological units (p0595) for the
representation of technological variables in the technology controller.
● If a changeover is made to referenced variables and the reference variable is
subsequently changed, the % value entered in a parameter will not change.
Example:
– With a reference speed of 1500 1/min, a fixed speed of 80 % corresponds to a value
– If the reference speed is changed to 3000 1/min, the value of 80 % is retained and is
Restrictions
● When a unit changeover occurs, rounding to the decimal places is carried out. This can
mean that the original value might change by up to one decimal place.
● If a referenced form is selected and the reference parameters (e.g. p2000) are changed
retrospectively, the physical significance of some of the control parameters is also
adjusted, which can affect the control behavior.
● If the reference variables (p2000 to p2007) are changed in the offline mode in STARTER,
there is a risk that the parameter value ranges will be violated. In this case, appropriate
fault messages will be displayed when the parameters are loaded to the drive unit.
Changing over the units
The units can be changed over via the AOP30 and via STARTER.
● Unit changeover via AOP30 is always carried out immediately. Once the corresponding
parameters have been changed, the values affected are displayed in the new selected
unit.
● If STARTER is used, unit changeover can only take place in offline mode in the
configuration screen of the corresponding drive object. The new units are not displayed
until after the download ("Load project to target system") and subsequent upload ("Load
project to PG") have been completed.
Unit groups
Each parameter that can be switched is assigned to a unit group which can be switched
within certain limits depending on the group.
This assignment and the units groups for each parameter appear in the parameter list in the
SINAMICS List Manual.
The unit groups can be individually switched using 4 parameters (p0100, p0349, p0505 and
p0595).
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
of 1200 1/min.
now 2400 1/min.
Functions, monitoring, and protective functions
9.2 Drive functions
421