ABB FSO-21, User Manual

Page: 398 / 540

398 Configuration

How to configure mute time for SBC speed limit detection
Example 1 : SBC speed limit (parameter SBC.15 ) is reached with the SS1 function (or
SSE with emergency ramp), a negative SBC delay (parameter SBC.12
STO SBC delay
)
is configured with the SS1 function:
• With an encoder : parameter FSOGEN.32 Zero speed delay time = 20 ms
• Without an encoder : 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.
Example 2 : SBC speed limit (parameter SBC.14 STO SBC speed ) is reached in the
STO function (and SSE with immediate STO), requires an encoder:
• With an encoder : parameter FSOGEN.32 Zero speed delay time = 20 ms .
Time
Speed
SBC delay elapsed, STO activated
FSOGEN.32 or FSOGEN.31 = 20 ms
SBC.15
= 90 rpm
SBC speed
limit reached
Mute time elapsed, SBC activated
SBC.12 = -15 ms
Time
Speed
FSOGEN.32 = 20 ms
SBC.14
= 90 rpm
SBC speed
limit reached
Mute time elapsed, SBC activated
STO activated