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Safety functions 89
Step Description
1
The SS1 request is received (for example, from the I/O). The FSO starts a counter for
time B. SS1 state indication parameter
) goes on.
2
After time D has elapsed, the drive starts to ramp down the motor speed. SAR1
parameter
defines the deceleration ramp.
Note:
If parameter
has value
0
, the drive (parameter
23.23
) defines the ramp.
3
The motor speed goes below the SBC speed limit (A), the FSO checks the value of
) and activates the SBC and drive STO functions:
is positive or zero, the SBC and drive STO functions are
activated at the same time (this case is shown in the figure).
is negative, the SBC is activated here and the drive STO after
this delay (see section
SS1 with speed limit activated SBC, SBC before STO
on
page
• STO active indication parameter
) goes on when STO is
activated.
The FSO starts a counter for time C.
Note
: You can define an extra delay (parameter
) before the FSO activates the
SBC and drive STO functions (not shown in the figure).
3b
If the drive has not ramped down fast enough when time B has elapsed, the FSO
activates the STO function. See section
on page
for more
information on how to configure the STO function.
4
After time C has elapsed, the FSO defines the motor as stopped, the
) goes on and the acknowledgement becomes
allowed as soon as the SS1 request has been removed (step 5).
5
The SS1 request is removed.
6
After the acknowledgement, the SS1, STO and SBC functions are deactivated and the
control is given back to the drive, which is allowed to 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 ...