Basic Positioner - Siemens SINAMICS S120 Function Manual

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Basic positioner

Function description

The basic positioner (EPOS) is used to position linear and rotary axes (modulo) in absolute/

relative terms with motor encoder (indirect measuring system) or machine encoder (direct

measuring system). EPOS is available for servo control and vector control.

For the basic positioner functionality, the Startdrive engineering tool provides graphic guides

through the configuration, commissioning and diagnostic functions. A control panel supports

you when using the basic positioner and when operating in the closed-loop speed controlled

The position control (r0108.3 = 1) is also automatically activated when activating the basic

positioner (r0108.4 = 1). The required BICO interconnections are automatically made.

Detailed information on the EPOS can also be found in the information system of the Startdrive

engineering tool.

The basic positioner requires the position controller functions. The BICO interconnections,

which are automatically made by the basic positioner when activated, must be changed by

experienced users (experts) only.

Functions of the position control

This means that the following functions are available for the position control:

● Standstill monitoring

● Position monitoring

● Dynamic following error monitoring

● Cam controllers

● Modulo function

● Probe evaluation

For more information, see Chapter "Position control (Page 445)".

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Function modules

9.8 Basic positioner