Selecting/Deselecting Safely Reduced Speed - Siemens SINUMERIK 840D sl Function Manual

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Safety Functions Integrated in the System/Drive

6.5 Safely reduced speed (SG)

Selecting/deselecting safely reduced speed

Selecting SG

The following SGEs are used to select SG:

Note: x –> Any signal state

The actual status of the function is displayed using the SGA "SBH/SG active" and

SGA "SBH active".

Before activating the SG function it must be ensured that the speed of the

axis/spindle is lower than the selected speed limit value. If it is higher, an alarm is

generated that causes the drive to be shut down.

The SGEs and SGAs are described in Chapter 7.1 "Safety–related input/output

signals (SGE/SGA)".

Selecting speed limit values

The maximum permissible speed of an axis/spindle in the setting–up mode is de-

fined for individual machine types in the C Standards (product standards). The ma-

chine manufacturer is responsible for ensuring that the correct speed limit value is

selected depending on the operating mode and the application.

The required speed limit is selected as follows by combining the following SGEs:

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition

Selecting/deselecting SG

SBH and SG are deselected

SBH is selected

(see Chapter 6.2, "Safe operating stop (SBH)"

SG is selected

Sinamics s120