Unit Changeover - Siemens SINAMICS G150 Operating Instructions Manual

Functions, monitoring, and protective functions
9.2 Drive functions
Parameters
• r0069
• r0089
• p0410
• p1820
• p1821
9.2.16

Unit changeover

Description
Parameters and process variables for input and output can be switched to a suitable units
system (SI units, US units or referenced variables (%)) with the help of the unit changeover
function.
The following constraints apply to the unit changeover:
● Unit changeover is only possible for the "VECTOR" and "B_INF" drive object.
● Parameters of the rating plate of the drive converter or the motor rating plate can be
changed over between SI/US units; however, a per unit representation is not possible.
● Once the changeover parameter has been changed, all parameters that are assigned to a
unit group depending on this parameter are jointly changed over to the new unit.
● 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
520
Phase currents actual value
Phase voltage actual value
Encoder inversion actual value
Reverse output phase sequence
Direction of rotation
of 1200 1/min.
now 2400 1/min.
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A