求翻译：The Three Gorges left bank station 500KV switching station switch control, data acquisition, scheduling data sent by the LCU 15 ( two LCU : LCU15A, I, left left II : LCU15B ). LCU15A and LCU15B are configured for dual controller cold standby mode, i.e. when the master and slave controller to switch, must stop the main controller, after the backup controller in the main controller during switching, monitoring system would lose the left I or left II switching station equipment remote monitoring and control, and the effects of control room return screen and scheduling data sending.是什么意思？

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