Function Diagrams; Unit Changeover - Siemens SINAMICS S150 NEMA Operating Instructions Manual

Converter cabinet units

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Table of Contents

Functions, monitoring and protective functions

9.3 Drive functions

Function diagrams

FD 4704, 4715

FD 6730, 6731

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

The following constraints apply to the unit changeover:

● Unit changeover is only possible for the "VECTOR" and "A_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.

– A fixed speed of 80% corresponds, for a reference speed of 1500 rpm, to a value of

– If the reference speed is changed to 3000 rpm, the value of 80% is retained and is

Encoder evaluation

Interface to the Motor Module

Phase currents actual value

Phase voltage actual value

Encoder inversion actual value

Reverse output phase sequence

Direction of rotation

now 2400 rpm.

Operating Instructions, 12/2018, A5E36652151A

Enclosed Drives