Safety Integrated Functions
8.2 General information about SINAMICS Safety Integrated
Function Manual
336 Function Manual, 01/2011, 6SL3097-4AB10-0BP3
8.2.3 Drive monitoring with or without encoder
If motors without an encoder are being used, not all Safety Integrated functions can be used.
In operation without encoder the speed actual values are calculated from the measured
electrical actual values.
As a consequence, speed monitoring down to a speed of 0 rpm is also possible for operation
without an encoder.
Table 8- 2 Overview of Safety Integrated functions
Functions Abbreviation With
encoder
Without
encode
r
Brief description
Safe Torque Off STO Yes Yes Safe torque off
Safe Stop 1 SS1 Yes Yes Safe stopping process in
accordance with stop
category 1
Basic
Functions
Safe Brake
Control
SBC Yes Yes Safe brake control
Safe Torque Off STO Yes Yes Safe torque off
Safe Stop 1 SS1 Yes Yes Safe stop in accordance with
stop category 1
Safe Brake
Control
SBC Yes Yes Safe brake control
Safe Stop 2 SS2 Yes No Safe stop in accordance with
stop category 2
Safe Operating
Stop
SOS Yes No Safe monitoring of the
standstill position
Safely Limited
Speed
SLS Yes Yes Safe monitoring of the
maximum speed
Safe Speed
Monitor
SSM Yes No Safe monitoring of the
minimum speed
Safe Acceleration
Monitor
SAM Yes No Safe monitoring of drive
acceleration
Safe Brake Ramp SBR No Yes Safe brake ramp
Extended
Functions
Safe Direction SDI Yes Yes Safe monitoring of the
direction of motion
The configuration of the Safety Integrated functions and the selection of monitoring with or
without encoder takes place in the Safety screens of the STARTER or SCOUT tools.
Monitoring with an encoder
The Safety Integrated functions with encoder are configured using p9506 = p9306 = 0 in the
expert list (factory setting) or by selecting "with encoder" in the Safety screen form.
The Safe Acceleration Monitor (SAM) recognizes if the drive accelerates beyond the
tolerance defined in p9348/p9548 during the ramp down phase, and generates a STOP A.
The monitoring function is activated for SS1 (or STOP B) and SS2 (or STOP C) and is
deactivated after the speed drops below the value set in p9368/p9568.
You can find more detailed information on the Safe Acceleration Monitor later on in this
manual.
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