F644 Negative Travel Limit Switch Detected检测到负行程限位开关

The negative travel limit switch has been actuated. 负行程限位开关已启动。

The axis has been stopped with the error reaction "set velocity command value to zero". 轴已停止，错误反应为“将速度命令值设置为零”。
Bit 2 of P-0-0090, Travel limit parameter has been set to "Exceeding the
travel limit is considered as an error", or a drive control command has
been started while the axis limit value is exceeded (e.g. drive-controlled
homing).P-0-0090的第2位，行程限制参数已设置为“超过行程限制被视为错误”，或者驱动控制命令在超过轴极限值时启动（例如驱动控制归位）。

Cause:原因：
The negative travel limit switch has been actuated.
负行程限位开关已启动。

Remedial action:补救措施：
1. Reset the error
重置错误
2. Activate the power supply
激活电源
3. Move the axis into the permissible working range
将轴移动到允许的工作范围内

Note:The drive will not accept any command values that lead further
away from the permissible range.
注意：驱动器将不接受任何进一步导致错误的命令值远离允许范围。
Specifying such a command will again result in this error.
这样的命令将再次导致此错误。