命令名称：read_device_variable_information

命令ID：1057

命令号：54

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
cmdDataFlags	cmdDataItemFlg_indexNinfo	0	0	0	device_variable_code

    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
cmdDataFlags	cmdDataItemFlg_indexNinfo	0	0	0	device_variable_code
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowSerialNumber
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowUnits
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowUSL
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowLSL
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowDampingValue
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowMinimumSpan
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowClassification
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowFamily
cmdDataReference	cmdDataItemFlg_None	0	0	0	volumeFlowUpdatePeriod