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Safety functions 121
Step Description
1
The SSE request is received (for example, from the I/O). SSE active indication
) goes on.
2
After time C has elapsed, the drive starts to ramp down the motor speed. SAR0
parameter
defines the deceleration ramp. The FSO starts the SAR0 ramp
monitoring (parameters
and
).
2b
If the motor speed hits a ramp monitoring limit, the FSO activates the STO function. See
section
on page
for more information on how to configure the
STO function.
3
The motor speed reaches the zero speed limit (B), the FSO stops the SAR0 monitoring
and activates the drive STO function, and STO active indication parameter
) goes on. The SSE completed indication goes on 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
on page
), also the SBC is activated (not shown in the figure).
(parameter
) is negative, the SBC is activated here and
the drive STO after this delay.
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 (and SBC, if used) (not shown in the figure).
4
The SSE request is removed.
5
After the acknowledgement, the STO and SSE functions are deactivated and the
control is given back to the drive, which can modulate again. The indications
), and
) go off.
Содержание FSO-21
Страница 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Страница 4: ......
Страница 16: ...16 Safety instructions ...
Страница 34: ...34 Safety information and considerations ...
Страница 52: ...52 Overview ...
Страница 236: ...236 PROFIsafe ...
Страница 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Страница 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Страница 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Страница 286: ...286 PROFIsafe ...
Страница 304: ...304 Installation ...
Страница 400: ...400 Configuration ...
Страница 488: ...488 Verification and validation ...
Страница 506: ...506 Fault tracing ...
Страница 514: ...514 Maintenance ...
Страница 536: ...536 Technical data ...
Страница 538: ...538 Dimension drawings 3AXD50000018513 ...