Siemens SINUMERIK 840D sl Function Manual page 252

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Table of Contents

Connecting Sensors/Actuators

7.4 Safe brake test (SBT)

Torque limiting

Torque limiting

Torque limiting

Torque limiting for SINAMICS S120

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 MD 36966 $MA_SAFE_BRAKETEST_TORQUE. In the dia-

gram 7-24, this torque is designated with m

The torque limiting of SINAMICS is symmetrical around the torque from drive pa-

rameter p1532. In the diagram 7-24 the measured torque m_Act is however less

This is the reason that m

is the sum from m

the value from the MD $MA_SAFE_BRAKETEST_TORQUE.

Incorrect parameterization in MD $MA_SAFE_BRAKETEST_TORQUE or drive

parameter p1532 could mean that the drive with reduced torque cannot even apply

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

from Fig. 7-24 is entered as torque limiting.

and the drive parameter p1532. If the measured

matches that parameterized in drive parameter p1532, m

Upper torque limiting + m

Lower torque limiting – m

Sinamics s120