求翻译：2、上位机(PC机或主PLC)通过串口连接到本控制器后，向控制器发送一串ASCII代码指令即可控制某个(或全部)继电器打开或关闭，完全不必要考虑继电器的硬件电路上选择、驱动等问题。比如，串口输入"O(00,002, 1)"则地址位为00的控制器的第2号继电器通电吸合；串口输入"O(00,012, 0)"，则地址位为00的控制器的第12号继电器失电断开。是什么意思？

2, the host computer (PC or PLC) via serial port connected to the controller, a string of ASCII code instructions is sent to the controller to control a (or all) relays open or closed, completely unnecessary considering the hardware selection, driving on the circuit of relays and other issues. For example, the serial input "o (00,002, 1)" the address bits 00 controller, relay, 2nd power snap; serial input "o (00,012, 0)", the address bits 00 12th relay load-disconnecting the controller.