ABB FSO-21 - How to Configure Mute Time for SBC Speed Limit Detection

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
(0ms), 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