Drive Monitoring With Or Without Encoder - Siemens SINAMICS S120 Function Manual

General information about SINAMICS Safety Integrated

2.5 Drive monitoring with or without encoder

2.5 Drive monitoring with or without encoder
If motors without a (safety-capable) encoder are being used, not all Safety Integrated
Functions can be used.
Note
Definition: "Without encoder"
When "without encoder" is used in this manual, then this always means that either no
encoder or no safety-capable encoder is being used.
In operation without encoder the actual speed values are calculated from the measured
electrical actual values. Therefore, speed monitoring is also possible during operation
without encoder.
Table 2- 1 Overview of Safety Integrated Functions
Functions
Basic Safe Torque Off
Functions
Safe Stop 1
Safe Brake Control
Extended Safe Torque Off
Functions
Safe Stop 1
Safe Brake Control
Safe Operating Stop
Safe Stop 2
Safely-Limited Speed
Safe Speed Monitor
Safe Direction
Safe referencing
Safe Acceleration Monitor
Safe Brake Ramp
Safe gearbox stage switch-
over
Safely-Limited Acceleration
Diagnostic function Safe
Brake Test
36
Abbr. With With- Brief description
en- out
coder en-
coder
STO Yes Yes Safe torque off
SS1 Yes Yes Safe stopping process in accordance with Stop
Category 1
SBC Yes Yes Safe brake control
STO Yes Yes Safe torque off
1)
SS1 Yes Yes Safe stopping process in accordance with Stop
1)
Category 1
SBC Yes Yes Safe brake control
1)
SOS Yes No Safe monitoring of the standstill position
SS2 Yes No Safe stopping process in accordance with Stop
Category 2
SLS Yes Yes Safe monitoring of the maximum speed
1)
SSM Yes Yes Safe monitoring of the minimum speed
1)
SDI Yes Yes Safe monitoring of the direction of motion
1)
SR Yes No Safe referencing
SAM Yes Yes Safe monitoring of drive acceleration
1)
SBR Yes Yes Safe braking ramp
1)
– Yes No –
SLA Yes No Safely limited acceleration
SBT Yes No Safe test of the required holding torque
of a brake
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated