命令名称：read_trend_data

命令ID：40B7

命令号：232

命令操作：cmdOpRead

命令中事务个数：1

事务列表

    事务号：0

    事务中请求数据列表

条目类型	标识	掩码	整数	浮点	变量ID
cmdDataConst	cmdDataItemFlg_None	0	5	0	0000

    事务中响应数据列表

条目类型	标识	掩码	整数	浮点	变量ID
cmdDataReference	cmdDataItemFlg_None	0	0	0	response_code
cmdDataReference	cmdDataItemFlg_None	0	0	0	device_status
cmdDataConst	cmdDataItemFlg_None	0	5	0	0000
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_loop_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	percent_output_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_echo_str_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_level_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_ifclvl_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_ifcthk_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_ifc_echo_str_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_volume_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_head_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_distance_value
cmdDataReference	cmdDataItemFlg_None	0	0	0	trend_flow_value