Cascade Historian: Version 4.1
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II. Dynamic Library Functions
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hist_access_buffer
-- accesses buffer elements using array-like syntax.
hist_buffer2array
-- generates an array from a binary buffer of historian data.
hist_buffer_id_destroy
-- destroys an interpolation query buffer.
hist_buffer_id_length
-- queries for the number of
X
-
Y
pairs.
hist_buffer_id_read
-- reads a buffer of data from the Cascade Historian.
hist_bufsize
-- sets the history buffer size.
hist_clip_buffer
-- clips
Y
values to fit within a range.
hist_count
-- counts the number of histories that match a pattern.
hist_deadband
-- sets the history value deadband.
hist_delete
-- removes a history from memory only.
hist_describe
-- describes a history's current configuration.
hist_disable
-- stops data recording.
hist_earliest
-- gives the earliest value in a history
hist_enable
-- activates data recording.
hist_exchange_buffer
-- swaps
X
and
Y
values.
hist_filebase
-- associates the history with a file for data storage.
hist_flush
-- writes buffered data to disk.
hist_gap_buffer
-- identifies and fills gaps in data that are too large for interpolation.
hist_history
-- creates a new history.
hist_interpolate
-- queries history data.
hist_interpolate_data
-- interpolates a history and returns data.
hist_latest
-- gives the latest value in a history
hist_length
-- finds the total number of values in a history.
hist_length_buffer
-- returns the number of
X
-
Y
pairs.
hist_list
-- finds the name of available histories.
hist_register
-- registers histories with the Cascade DataHub.
hist_scale_buffer
-- performs offset and scaling operations.
hist_stat_buffer
-- generates summary statistics on
Y
-values.
hist_unregister
-- unregisters histories with the Cascade DataHub.
hist_version
-- gets the version number of the Cascade Historian.
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