ABB FSO-12, User Manual

Page: 284 / 388

284 Configuration

How to fine-tune when SBC speed limits are detected
Example : SBC speed limit (parameter SBC.15 ) is reached in the SS1 function (and
SSE with emergency ramp), a negative SBC delay (parameter SBC.12
STO SBC delay
)
is configured in the SS1 function:
• parameter FSOGEN.31 Transient mute time = 20 ms .
Note : If the SBC delay (parameter SBC.12 STO SBC delay ) is positive or zero
( 0 ms ), the SBC and STO functions are activated at the same time.

How to fine-tune when monitoring is started
Example : The start of SLS monitoring in the SLS1 function.
• parameter FSOGEN.31 Transient mute time = 20 ms.
Note : The SLS indication goes on after this delay.
Time
Speed
SBC delay elapsed, STO activated
FSOGEN.31 = 20 ms
SBC.15
= 90 rpm
SBC speed
limit reached
Mute time elapsed, SBC activated
SBC.12 = -15 ms
200.23 = 1200 rpm
SLSx.14 = 1320 rpm
SLS1
Time
Speed
Motor speed in the middle
of SLS and SLS trip limits
FSOGEN.31 = 20 ms
SLS monitoring started