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70 Safety functions
SS1 with speed limit activated SBC, SBC before STO
In these examples, the SBC function is activated at a user-defined speed limit and
drive STO function after a user-defined delay (negative SBC delay). The reason to
use a negative SBC delay (parameter
) is to have the mechanical brake
closed just before the drive STO circuit is opened.
With time monitoring (SS1-t)
The operation of the SS1-t function with speed limit activated SBC, SBC before STO
is described in the time diagram and table below. For configuration, see section
to configure SS1 with speed limit activated SBC, SBC before STO
A
SBC speed (parameter
): Speed limit below which the FSO activates the SBC
(brake).
B
SS1-t delay for STO (parameter
): Time after which the FSO activates the STO
function regardless of the motor speed.
C
SBC delay (parameter
): Time from the activation of the SBC function to the
moment when the FSO activates the drive STO function
.
D
SBC time to zero (parameter
): Time from the SBC activation to the moment
when the safety function is completed and the SS1 completed indication (parameter
) goes on. The acknowledgment becomes allowed. You must set this to the
estimated time in which the motor brakes to a stop from the maximum speed.
E
Response time (depends on system configuration, see page
Drive STO state
& indication
SS1 request
Motor speed
Time
SS1 state &
indication
1
7
2
SBC output
3
A
E
SS1 completed
indication
B
3b
C
D
4
6
5
- ->
Содержание FSO-12
Страница 1: ... OPTIONS FOR ABB DRIVES FSO 12 safety functions module User s manual ...
Страница 4: ......
Страница 12: ...12 Table of contents ...
Страница 26: ...26 Introduction to the manual The PROFIsafe certificate for the FSO 12 module is attached below ...
Страница 36: ...36 Safety information and considerations ...
Страница 136: ...136 Safety functions ...
Страница 196: ...196 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Страница 200: ...200 PROFIsafe ...
Страница 326: ...326 Start up ...
Страница 386: ...386 Dimension drawings ...