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142 Safety functions
Note:
If drive modulation is lost when SLS function is activated and the motor speed
is below SLS limit, SLS indication is on and STO is not activated due to loss of drive
modulation.
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 active indication (parameter
,
) goes on. The drive limits the motor speed so that it
does not go above the SLS limit positive.
2
If the motor speed reaches the SLS trip limit positive (A), the FSO activates the SSE
function and the motor coasts to a stop (in this case, the SSE function has been
configured as “Immediate STO” (parameter
), see section
on
page
).
3
The SLS request is removed. The SLS monitoring is still on (acknowledgement method
is manual or from a safety PLC) (parameter
, configured as Manual_Safebus).
Note
: If automatic acknowledgement is used, the SLS monitoring is also ended.
4
The SLS function is acknowledged and the FSO stops the SLS monitoring. The SLS
active indication (parameter
,
) goes off.
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 ...