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78 Safety functions
Step
Description
1
The STO request is received (for example, from the I/O). The FSO activates the drive
STO function. STO active indication parameter STO output (
) goes on.
2
After time C has elapsed, the acknowledgement becomes allowed as soon as the STO
request has been removed (step 5).
3
The motor speed goes below the SBC speed limit (A) and the FSO activates the SBC
function (brake).
4
The motor speed reaches the zero speed limit (B), the FSO module defines the motor
as stopped and the STO completed indication goes on. The acknowledgement
becomes allowed despite of value C as soon as the STO request has been removed
(step 5).
5
The STO request is removed.
6
After the acknowledgement, the STO and SBC functions are deactivated, and the
control is given back to the drive, which controls the brake from now on. The
indications STO output (
) 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 ...