Safety functions 85
Step Description
1
The SS1 request is received (for example, from the I/O).
2
After time B has elapsed, the drive starts to ramp down the motor speed. SAR1
parameter
defines the deceleration ramp. The FSO starts the SAR1 ramp
monitoring (parameters
Note:
has value
0
, the drive (parameter
23.23
) defines the ramp.
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), FSO stops the SAR1 monitoring and
activates the drive STO function, and STO active indication parameter STO output
(
indication (parameter
) goes on
and the acknowledgement becomes allowed as soon as the SS1 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).
• If the
(parameter
) 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 SS1 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 SS1 request is removed.
5
After the acknowledgement, the STO and SS1 functions are deactivated and the
control is given back to the drive, which is allowed to modulate again. The indications
(
),
) 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 ...