Siemens SINAMICS G120 Application Description - Page 6

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2 Solution

2.2 PLCopen

Instead, you use the SIMATIC S7-1500 motion control instructions (function blocks)

conforming to the PLCopen standard to control the SINAMICS G120.

Disadvantages

As a new motion control instruction needs to be sent for each speed change, this

method is not fully suited for applications with a constantly changing setpoint (e.g.,

due to a pressure regulator).

The number of technology objects possible in the SIMATIC S7-1500 depends on

the CPU type used:

CPU 1511 and CPU 1513 support max. 6 technology objects, CPU 1516 supports

max. 20 technology objects.

2.2

PLCopen

PLCopen is a cross-company organization that develops standards intended to

increase efficiency in development and reduce maintenance costs for control

programs.

The PLCopen organization is independent of vendors or specific products.

For more information on PLCopen, please refer to \7\.

In motion control, PLCopen defines function blocks that execute specific

movements or functions.

Figure 2-3

The PLCopen function blocks send jobs to axes, which then execute these jobs.

An axis generally consists of a converter, a motor and, where necessary, a position

sensor.

SINAMICS G120 as a Speed Axis on the S7-1500

V1.0a, Entry ID: 78788716