![ABB FSO-21 User Manual Download Page 147](http://html.mh-extra.com/html/abb/fso-21/fso-21_user-manual_2728147.webp)
Safety functions 147
SLS reaction when modulation is lost during deceleration ramp,
with ramp monitoring
If SLS function is activated when motor speed is above the SLS trip limit, FSO will
force the drive to decelerate to SLS limit. If the drive stops modulation during this
deceleration ramp, user can pre-select the reaction of the SLS function (parameter
SLSx.05) from the following:
• Modoff delay time
• Monitoring active
• Monitoring active and modoff delay time
• Monitoring and modoff delay time disabled.
SLS reaction if modulation is lost with Modoff delay time
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp with Modoff delay time selected (parameter SLSx.05 is set to
Modoff delay time) is described in the time diagram and table below. For
configuration, see section
How to configure SLS function behavior when drive
.
A
SAR1 ramp monitoring
B
Actual motor speed (coasting after modoff)
C
SLS trip limit
D
SLS limit
SLS indication
STO.14 delay
Motor speed
Time
1
3
4
2
C
A
A
D
B
Drive modulation
SLS request
SAR1 monitoring
SLSx.06 Modoff
delay time monitoring
STO active
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 ...