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72 Safety functions
With an encoder
Step Description
1
The STO request is received (for example, from the I/O). The FSO activates the drive
STO and starts counters for times A and C. 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
After time A has elapsed, the FSO activates the SBC (brake) and starts a counter for
time B.
4
After time B has elapsed, the FSO module defines the motor as stopped and
the STO
completed indication goes on.
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 (
) and STO completed output (
) go off.
A
Zero speed with encoder (parameter
): Speed limit at which the motor has
stopped, the safety function is completed and STO completed indication (parameter
) goes on.
B
): Time from the activation of the drive STO function to the
moment when the FSO activates the SBC function (brake). In this case, the value is
positive and the FSO activates the SBC after the drive STO. If the value is zero, the FSO
activates the SBC and drive STO functions at the same time.
Note
: It is possible to set
the SBC delay so that the SBC is activated while the motor is still rotating.
Drive STO state
& indication
STO request
Motor speed
Time
STO completed
indication
1
5
B
3
SBC output
2
6
C
4
A
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 ...