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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
200.102
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 55), also the SBC is activated (not shown in the figure).
• If the
STO SBC delay
the drive STO after this delay.
• If the
STO SBC delay
activated at the same time.
• The SSE completed indication goes on after the delay defined with parameter
SBC.13
has elapsed from the SBC activation.
Note: You can define an extra delay (parameter SSE.16) 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
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.
defines the deceleration ramp.
(parameter SBC.12) is negative, the SBC is activated here and
is positive or zero, the SBC and drive STO functions are
Safe torque off (STO)
Safety functions 83
Safe torque off (STO)
on page
55
for more
on
- Quick Links:
- Fso Diagnostics
- I/O
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