Sla - Siemens SINUMERIK MC Commissioning Manual

4.17

SLA

Definition according to EN 61800-5-2:
"The SLA function prevents the motor from
exceeding the defined acceleration limit."
Examples of how the function can be used
Example
In the setup mode, it is not permissible that the drive
exceeds the permissible acceleration.
Function "Safely-Limited Acceleration" (SLA) monitors that the motor does not violate the
defined acceleration limit (e.g. in the setup mode). SLA detects early on whether the speed is
increasing at an inadmissible rate (the drive accelerates uncontrollably) and initiates the stop
response.
SLA is effective when accelerating, however, not when braking.
Note
Safety function "Safely-Limited Acceleration" (SLA) can only be used with an encoder.
Note
Safety function "Safely-Limited Acceleration" (SLA) can only be used for 1-encoder systems.
Note
Configuration only possible in the parameter list
Contrary to other Safety Integrated Functions, there is no configuration screen form for SLA in
the SINUMERIK ONE Commissioning Tool. Therefore, parameterize this function in the
parameter list.
Enabling SLA
● You enable the SLA function with p9501.20 = 1.
Selecting SLA
Select the SLA function using the PROFIsafe control word S_STW1.8 or S_STW2.8. Which
control word you use depends on the PROFIsafe telegram that you configured.
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
Safety functions integrated in the drive
a
Possible solution
● Select SLA in the converter via PROFIsafe.
● The converter limits and monitors the accel‐
eration of the machine.
4.17 SLA
SLA
t
185