168 Safety functions
Step Description
1 The SLS request is received, the motor speed is below the SLS limit positive (B) and
the FSO starts the SLS monitoring. The SLS indication (parameter SLSx.15, SLSx.24,
SLSx.34 or SLSx.44) goes on.
2 The motor speed goes above the SLS limit positive (B).
3 The motor speed reaches the SLS trip limit positive (A). The SLS indication goes off.
4 After time C has elapsed, the FSO activates the SSE function, opens the drive STO
circuit and the motor coasts to a stop.
5 After time D has elapsed, the motor has stopped and the SLS active indication goes on
(speed is below the SLS limit positive). The SSE completed indication goes on.
Note: If the SBC is configured in the SSE function, parameter SBC.13 is used here
instead of STO.14.
6 The SLS request is removed. The SLS monitoring is still on (acknowledgement method
is manual or from a safety PLC).
7 The SLS function is acknowledged and the FSO stops the SLS monitoring. The SSE
function is acknowledged with the same acknowledgement. The indications go off.
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