After that, IFO could not reach RF_LOCKED state because transmission powers decreased when ASCs were engaged, unfortunately.

I stopped LSC_LOCK from engaging ASC by requesting ENGAGE_WFS_DC. Then I engaged ASCs one by one. I found that DSOFT Y error signal moved far away from 0 when DSOFT Y was engaged. (fig.1)

I attempted something to solve this issue, flipped the sign and offloaded the offset in DSOFT_Y_A. However, I failed to solve it by these attemption. At last, I restored the input matrix value. Then, IFO was suceeded in reaching RF_LOCKED state. Therefore, the input value in klog36329 seems not to be reproducibility, unfortunately.