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120 Safety functions
FSO boot behavior with SLS active
When the safe speed estimate is in use, the following boot behavior exists.
During FSO module boot, the FSO module has no valid speed data and thus a very
high initialization value for motor speed is assumed for internal FSO usage. If an SLS
function or variable SLS function is active during FSO reboot and parameter SLSx.05
is configured so that
Modoff delay time
or
Monitoring active
is selected, the FSO will
prevent the drive from restarting until the STO.14 delay time has elapsed.
Step Description
1
SLS request is active during FSO boot.
2
FSO module is rebooted. STO.14 delay time counter is started.
3
STO.14 has elapsed, STO acknowledgement is possible, and SLS indication is
activated.
Note:
If STO is acknowledged before STO.14 delay time has elapsed, STO.14 delay
time counter is restarted.
Time
SLS ok
STO
SLS request
STO.14 delay
FSO boot
2
3
1
Summary of Contents for FSO-12
Page 1: ... OPTIONS FOR ABB DRIVES FSO 12 safety functions module User s manual ...
Page 4: ......
Page 12: ...12 Table of contents ...
Page 36: ...36 Safety information and considerations ...
Page 136: ...136 Safety functions ...
Page 196: ...196 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Page 200: ...200 PROFIsafe ...
Page 326: ...326 Start up ...
Page 386: ...386 Dimension drawings ...