1 bit: UP acceleration mode
0: Fix speed acceleration, according to A41 fix speed: To increase frequency every 200ms.
1: Fix times acceleration, according to fix times: To increase frequency every triggering.
10 bit: DN deceleration mode
0: Fix speed deceleration, according to A42 fix speed: To reduce frequency every 200ms.
1: Fix times deceleration, according to A42 fix times: To reduce frequency every triggering.
100 bit: UP adjustment mode of adjusting speed ratio