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192 Safety functions
SDI trip limit hits
This applies to SDI trip limit hit situations, that is, when the motor rotates too much to
the forbidden direction while the SDI monitoring is on. The SDI positive function is
used as an example.
Note
: This diagram shows the position of the motor shaft (not the motor speed).
A
SDI tolerance limit degree (parameter
): The motor shaft cannot move to the
forbidden direction more than defined with this parameter.
SDI monitoring limit
Step Description
1
The SDI positive request is received (for example, from the I/O) and the FSO starts the
SDI monitoring. The SDI active indication goes on. The motor rotates to the correct
direction (in this case, positive).
2
The motor stops.
3
The motor starts to rotate again (into the positive direction).
4
The rotation direction of the motor changes to the forbidden (negative) direction. The
FSO locks the SDI tolerance limit (A) into its current position.
5
The SDI tolerance limit (A) is reached. The FSO stops the SDI monitoring and activates
the SSE function and the motor coasts to a stop. The SDI indication goes off. The SSE
indication goes on. See section
on page
for more
information on how to configure the SSE function.
6
The motor has stopped. The SSE function is completed and the FSO starts the SDI
monitoring. The SDI active indication goes on and the SSE indication goes off.
When the motor starts to rotate again (into the correct direction), the SDI monitoring
continues with the original SDI tolerance limit (A).
SDI state &
indication
SDI request
Motor shaft
position
Time
1
2
4
SSE state &
indication
A
3
5 6
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 ...