Cycle Mix For Servo Control And Vector Control - Siemens SINAMICS S120 Function Manual

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Table of Contents

Use of the SINAMICS Web server

The available computation time can be used for the SINAMICS Web server. The following

boundary condition applies here:

● The utilization of the system (r9976) must be less than 90%.

● A maximum of five users can access data on the same drive via the SINAMICS Web server.

Use of CUA31 / CUA32

The following table shows the number of axes which can be operated when using the

Control Unit Adapter CUA31 or CUA32. The number of axes is dependent upon the following

Table 14-22 Number of axes when using the CUA31 / CUA32

The CUA31 or CUA32 is the first component in the topology.

The CUA31 or CUA32 is not the first component in the topology.

Current controller sampling time = 62.5 µs

Cycle mix for servo control and vector control

Supplementary conditions

The rules for setting the sampling time (see Section Rules when setting the sampling times

(Page 838)) and the rules on isochronous mode (see Section Rules for isochronous mode

(Page 841)) apply.

These rules mean that the smallest common multiple of the current controller sampling times

of all axes operated on the isochronous PROFIBUS and 125 µs is used to set T

Current controller sampling times for cycle mix

Consequently the smallest common multiple of the current and speed controller sampling times

of all axes operated on the isochronous PROFIBUS is used to set the base cycle for T

. For a cycle mix, a compromise must be sought between the base cycle to set T

, and the required pulse frequency.

Table 14-23 Examples of cycle mixes for servo control

Cycle mix: Current controller sampling times

Drive functions

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

14.12 System rules, sampling times and DRIVE-CLiQ wiring

Basic information about the drive system

Base cycle for T

Number of axes

Base cycle for T