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Safety functions 139
SSE when drive modulation is lost during deceleration ramp
The behavior of SSE function in a situation where modulation is lost during
deceleration ramp is similar to SS1 function with ramp monitoring, see section
ramp functions when drive modulation is lost
.
Step Description
1
The SSE request is received (for example, from the I/O). SSE active indication
) goes on.
2
After time D has elapsed, the drive starts to ramp down the motor speed. SAR0
parameter
defines the deceleration ramp. The FSO starts the SAR0 ramp
monitoring (parameters
and
).
3
The motor speed goes below the SBC speed limit (A). The FSO activates the SBC
function.
The FSO starts a counter for time C.
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 motor speed hits a ramp monitoring limit, the FSO activates the STO function.
See
section
on page
for more information on how to configure the
STO function.
4
After time C 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 and stops the SAR0 monitoring. The SSE completed indication goes on and
the acknowledgement becomes allowed as soon as the SSE request has been
removed (step 6).
6
The SSE request is removed.
7
After the acknowledgement, the SSE, 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.
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 ...