ABB FSO-21, User Manual

Page: 366 / 540

366 Configuration
Configuring Variable SLS
This safety function requires that a safety PLC is connected to the FSO module via
the PROFIsafe communication bus. For more information, see chapter
PROFIsafe
and section Configuring the safety fieldbus communication on page 318 .
To configure the Variable SLS function, set the FSO parameters listed below to
appropriate values using the Drive composer pro PC tool. See parameter groups
Safety on page 402 and SLSx on page 422 .
The Variable SLS function uses the SLS4 limits of the FSO module. Depending on
the application, set the negative and positive SLS and trip limits separately.
Note: If possible, reserve SLS4 function only for variable SLS use.
The FSO module scales the SLS4 trip limit so that the difference between the new
limits does not become too small. For more information, see section
Defining the
scaled SLS4 limit and SLS4 trip limits on page 370 .
Note: If SLS4 limits or trip limits are changed, it affects the Variable SLS limits and trip
limits.
For more information on the Variable SLS function, see page 172 .

How to configure Variable SLS with time monitoring
Example: The figure below shows an example of the Variable SLS function with time
monitoring set-up:
• Variable SLS function activated
( 200.61 SLS variable activity and version = Version 1 )
• automatic acknowledgement ( SLSx.02 SLS acknowledgement = Automatic )
• time monitored deceleration ramp
( SLSx.03 SLS activation monitoring method = Time )
• deceleration and acceleration ramps according to drive parameters
• SLS activation delay: 2000 ms (
SLSx.04 SLS time delay = 2000 ms )
• single output connected ( SLSx.51 Variable SLS output = DO X114:7 )
• positive limits: SLS 1200.0 rpm, trip limit 1320.0 rpm
( 200.53 SLS4 limit positive = 1200 rpm,
SLSx.43 SLS4 trip limit positive = 1320 rpm ).
• negative limits: SLS -100.0 rpm, trip limit: -150.0 rpm
( FSOGEN.51 Zero speed without encoder or when an encoder is used:
FSOGEN.52 Zero speed with encoder ), not shown in the figure)
( 200.52 SLS4 limit negative = -100 rpm,
SLSx.42 SLS4 trip limit negative = -150 rpm ).
• See also section Configuring mute times on page 393 .