Description: Manual active/standby switchover. Active/standby switchover refers to the process that the standby control board works as the active control board when the active control board is faulty or reset, or when the switchover command is issued manually. If the hwSwitchOverStatus value of the hwSwitchOverControl object in the table is off(2), it indicates that the switchover in the system is disabled. In this case, the manual active/standby switchover cannot be performed.It is advised to query the value of hwQrydatasyncondition before setting this value. If the returned value of hwQrydatasyncondition is synccompleteness(1), the operation is reasonable. This command will take no effect when the values of hwAutoswitchoverSwitchStatus, hwAutoswitchoverTime, hwAutoswitchoverCycle and hwDayNo are set at the same time, and their original values will remain unchanged. Options: 1. nooperation(-1) -No operation. 2. switch(1) -Active/standby switchover.