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Safety functions 105
Step Description
1
The SS1 request is received (for example, from the I/O). The drive starts to ramp down
the motor speed. SAR1 parameter
defines the deceleration ramp. The FSO
starts the SAR1 ramp monitoring (parameters
and
).
Note:
If parameter
has value
0
, the drive (parameter
23.23
) defines the ramp.
2
The drive trips on a fault or user stops the drive, modulation of the drive stops. FSO
module activates the STO function and STO indication (parameter STO.21 STO
output).
SAR1 ramp monitoring goes off.
See section
on page
for more information on how to configure
the STO function.
Note:
If STO is used in cascaded system (see
on page
), it will not be
activated in the whole system in this case.
Note:
SS1 completed indication (
) is used instead of STO completed indication
(STO.22) in this case
Note:
If the SBC is configured in the STO function, also the SBC is activated according
to the configuration (not shown in the figure).
3
The
indication (parameter
) goes on and the
acknowledgement becomes allowed as soon as the SS1 request has been removed.
SS1 function can be acknowledged when STO.14 delay has elapsed after the drive
modulation is lost.
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 ...