Safety functions 83
Step Description
1
The SSE request is received (for example, from the I/O). The FSO starts a counter for
time A.
2
After time C has elapsed, the drive starts to ramp down the motor speed. SAR0
parameter
defines the deceleration ramp.
3
The motor speed goes below the zero speed limit (B) and the FSO activates the drive
STO function. The SSE completed indication goes on and the acknowledgement
becomes allowed as soon as the SSE request has been removed (step 4).
Note
: If the SBC is configured in the STO function (see section
page
), also the SBC is activated (not shown in the figure).
• If the
) is negative, the SBC is activated here and
the drive STO after this delay.
• If the
is positive or zero, the SBC and drive STO functions are
activated at the same time.
• The SSE completed indication goes on after the delay defined with parameter
has elapsed from the SBC activation.
Note
: You can define an extra delay (parameter
) before the FSO activates the
drive STO function (not shown in the figure).
3b
If the drive has not ramped down fast enough when time A has elapsed, the FSO
activates the STO function. See section
on page
for more
information on how to configure the STO function.
4
The SSE request is removed.
5
After the acknowledgement, the STO and SSE functions are deactivated. The
indications go off.
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 ...
