Siemens SINUMERIK 840D sl Function Manual page 294

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Table of Contents

Connecting sensors and actuators

8.6 Safe Brake Test (SBT)

Effectiveness of the torque limiting

When selecting the brake test, the holding torque required for the force due to the weight of

the axis is internally measured (m

The drive must only additionally provide the difference between this torque and the braking

torque from MD36966 $MA_SAFE_BRAKETEST_TORQUE. In the diagram, this torque is

designated m

For the non-automatic torque determination function, the following applies: The SINAMICS

drive sets its torque limits symmetrically around the torque from drive parameter p1532.

However, in the diagram the measured torque m

This is the reason that m

that parameterized in drive parameter p1532, m

$MA_SAFE_BRAKETEST_TORQUE.

Torque limiting for SINAMICS S120

from the diagram above is entered as torque limiting.

is the sum from m

and drive parameter p1532. If the measured torque m

is less than p1532.

becomes the value from the MD

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

Safety Integrated