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Safety functions 191
Step Description
1
The SDI positive request is received (for example, from the I/O). The motor rotates into
the forbidden direction (in this case, negative). The drive starts to decelerate the motor
speed to zero speed. SAR1 parameter
defines the deceleration ramp. The
FSO module starts the ramp monitoring (SAR1 parameters
)
.
The
SDI active indication is off.
Note
: If parameter
has value
0
, the drive (parameter
23.23
) defines the ramp.
2
The motor speed reaches zero and the motor stops. The FSO stops the ramp
monitoring and starts the SDI monitoring according to the SDI tolerance limit degree
(not shown in this figure, see section
SDI with correct rotation direction
on page
The SDI active indication goes on.
2b
If the deceleration of the motor does not follow the ramp monitoring limits, the FSO
module activates the STO function and the motor coasts to a stop.
The STO indication
goes on (parameter
). See section
on page
for more
information on how to configure the STO function.
3
The user gives a new speed reference. The motor starts to rotate into the correct
(positive) direction.
3b
Zero speed limit (A) reached. If the STO function was activated at 2b, the STO
acknowledgement becomes allowed and the FSO starts the SDI monitoring.
4
The SDI request is removed and the FSO stops the SDI monitoring. The SDI function is
acknowledged (automatic SDI acknowledgement) and the SDI active indication goes
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 ...