英语翻译与COM-闭合速度指令被认为是0.如果与COM-保持闭合120ms以上,报警状态被清除（正常工作时不要与COM-

The speed instructions is considered to be 0 when COM- is connected.
If COM- is connected for longer than 120ms,alarm is discharged (don't connect to COM- under the normal working conditions)
速度指令应该是个专业名词,是instructions per second (IPS)吗?你要查一下,把speed instructions换成正确的.