| STX | ADDR | CM1 | CM2 | DATA1 | DATA2 | BCC |
| 报头 | 地址 | 命令1 | 命令2 | 数据1 | 数据2 | 异或校验 |
| CON | FEQ | STA | STOP | FORE | BACK | UP | DOWN |
| CON | 1控制字节有效 | 0控制字节无效 |
| FEQ | 1频率值有效 | 0频率值无效 |
| STA | 1启动 | 0状态不变 |
| STOP | 12停机 | 0状态不变 |
| FORE | 1正转 | 0状态不变 |
| BACK | 1反转 | 0状态不变 |
| UP | 1升速 | 0状态不变 |
| DOWN | 1减速 | 0状态不变 |
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