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Safety functions 99
Step Description
1
The SS1 request is received (for example, from the I/O). The FSO starts a counter for
time C. SS1 state indication parameter
) goes on.
2
After time E 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 activates SBC function.
The FSO starts a counter for time D.
Note
: You can define an extra delay (parameter
, not shown in the figure) before
the FSO activates the SBC function. This affects also the STO activation (step 4).
3b
If the drive has not ramped down fast enough when time C 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 D has elapsed, the FSO activates the drive STO function. STO active
indication parameter
) goes on when STO is activated.
5
The motor speed reaches the zero speed limit (B), 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 6).
6
The SS1 request is removed.
7
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.
Summary of Contents for FSO-21
Page 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Page 4: ......
Page 16: ...16 Safety instructions ...
Page 34: ...34 Safety information and considerations ...
Page 52: ...52 Overview ...
Page 236: ...236 PROFIsafe ...
Page 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Page 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Page 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Page 286: ...286 PROFIsafe ...
Page 304: ...304 Installation ...
Page 400: ...400 Configuration ...
Page 488: ...488 Verification and validation ...
Page 506: ...506 Fault tracing ...
Page 514: ...514 Maintenance ...
Page 536: ...536 Technical data ...