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Safety functions 159
SLS reaction if modulation is lost with Modoff delay time - modulation returns
before modoff delay
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp and the modulation returns before the Modoff delay time has run
out with Modoff delay time selected (parameter
is set to Modoff delay time)
is described in the time diagram and table below.
B
Actual motor speed (coasting after modoff)
C
SLS trip limit
D
SLS limit
Motor speed
Time
1
6
5
4
3
2
B
Drive modulation
SLS request
SLS monitoring
SLS indication
SLSx.06 Modoff time
delay monitoring
SLSx.04 time
delay monitoring
C
D
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 ...