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This section describes how to query logged data. The following is an example of the Query page of the Historic Data Table dialog box.

The following table describes each property in the Query page of the Historic Data Table dialog box.

		Word	Description
Property		Description
Support Dynamic Query		Check this option if you want the object displays the records filtered by dynamic conditions set at runtime. With dynamic query, the object performs the query operation only when the trigger bit changes from Off to On at runtime.
Support Static Query		Check this option if you want the object displays the records filtered by predefined conditions. With static query, any change of query conditions at runtime will not be applied.
Query Trigger Bit		Specifies the bit that will trigger the query operation at runtime. The HMI reads the Query Parameter Block and refreshes the object according to the current query conditions whenever the Query Trigger Bit changes from Off to On. Click to enter the bit address. Click to enter the bit tag. Available only when the Support Dynamic Query option is selected.
Query Parameter Block		Specifies the location that stores the query parameters. Click to enter an address for this field. Click to select a tag for this field. The following table shows the data arrangement of the parameter block.
		0	The query flags.
			Bit	Operation
			0	Reserved for future use. Must be 0.
			1	Query the data records that occurred within the specified duration when the bit is on. The date range is specified in word 1-6 of the Query Parameter Block. The time range is specified in word 7-12 of the Query Parameter Block.
			2~14	Reserved for future use. Must be 0.
			15	Customized items handled by the query processing macro
			Note: 1) When both query flags are on, the result will fulfill both query conditions. 2) If you want to display all data when the query processing is enabled, set the first parameter to zero, i.e. set all the query flags to 0, and then trigger the query processing.
		1,2,3	The start date of the date range. Year (word 1): 0~99; Month (word 2): 1~12; Day (word 3): 1~31
		4,5,6	The end date of the date range. Year (word 4): 0~99; Month (word 5): 1~12; Day (word 6): 1~31
		7,8,9	The start time of the time range. Hour (word 7): 0~23; Minute (word 8): 0~59; Second (word 9): 0~59
		10,11,12	The end time of the time range. Hour (word 10): 0~23; Minute (word 11): 0~59; Second (word 12): 0~59
		Note: The word 1- 12 of the Query Parameter Block will be available only if the corresponding query item is selected.
Block Size (Words)		The size in word of query parameter block.
Query Items	Date Range	Check this option if you want the object to display the records that occur in the specified date range.
	Time Range	Check this option if you want the object to display the records that occur in the specified time range. Available only when the Date Range is checked.
	Customized items to be processed by the query processing macro	Check this option if you want to set query conditions in query processing macro. Note: A query processing macro must use QRET command to report if the currently processed record is qualified for the current query and terminate itself. Only qualified records are displayed according to the query conditions.
	Current Data Buffer	Specifies the variable representing the data buffer for query processing macro to save the current record. Click to enter an address for this field. Click to select a tag for this field.
	Buffer Size	The size of the current data buffer which is the size of a record.