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Safety functions 167
SLS trip limit hits
If the motor speed exceeds an SLS trip limit, the FSO activates the SSE function. The
operation of SLS and SSE indications in SLS trip limit hit situations are described in
the diagrams and tables below. For more information on the SSE function, see
section
on page
SSE with immediate STO, with a safe speed estimate
This applies when the SSE function has been configured as “Immediate STO”.
A
SLS trip limit positive (parameter
B
,
C
Response time (depends on system configuration, see page
D
Time to zero speed (parameter
SLS trip limit (A)
SLS indication
SLS request
Motor speed
Time
A
7
1
6
B
4
3
D
C
SSE state &
indication
5
SSE completed
indication
2
Summary of Contents for FSO-21
Page 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Page 4: ......
Page 16: ...16 Safety instructions ...
Page 34: ...34 Safety information and considerations ...
Page 52: ...52 Overview ...
Page 236: ...236 PROFIsafe ...
Page 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Page 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Page 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Page 286: ...286 PROFIsafe ...
Page 304: ...304 Installation ...
Page 400: ...400 Configuration ...
Page 488: ...488 Verification and validation ...
Page 506: ...506 Fault tracing ...
Page 514: ...514 Maintenance ...
Page 536: ...536 Technical data ...