Excessively high speed during incorrect control of the Safely-Limited Speed limits via F-DI
For all control options except PROFIsafe, limit SLS1 is activated after 2 discrepancy errors that
have not been acknowledged. This means that for the 2 F-DIs for selecting the velocity levels,
the value 0 is the "safe state" (failsafe value).
● Therefore parametrize the SLS limits in ascending order, i.e. with limit SLS1 as the lowest
speed and limit SLS4 as the highest speed.
Responses
Speed limit value exceeded:
● Configured subsequent stop STOP A/B/C/D/E via p9563
● Safety message C01714
System fault:
● STOP F
● Safety messages C01711
Transferring the first limit value via SIEMENS telegram 901, 902 or 903
You have the option of influencing the first SLS limit value via PROFIsafe:
● The transfer of the first SLS limit value via PROFIsafe is active if the speed level 1 in the
PROFIsafe telegram is selected and the bit "Enable transfer SLS (SG) limit via PROFIsafe"
(p9501.24) is set.
● S_SLS_LIMIT_A has the value range 1 ... 32767; the following applies:
– 32767 ≙ 100 % of the 1st SLS level
– The actually monitored limit value is calculated as follows:
SLS limit value = (S_SLS_LIMIT_A/32767) × p9531[0]
● Also in this case, speed levels 2, 3 and 4 can be parameterized and selected.
● In operation, the selected delay time cannot be changed. If you require various delay times
in your application, then you must realize this using a time-delayed transfer of the SLS limit
value using the F-PLC.
● If an incorrect SLS limit value is transferred, then the converter responds with the stop
response of speed level 1 parameterized in p9563.
Safety functions integrated in the drive
4.10 SLS
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB 141
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