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Using & Accessing Historian Data. Understanding the Proficy Historian and how to use the Excel Add-in to view plant data. Stephen Friedenthal 617.916.5101 (w) / 617.901.9193 (m). Agenda. System Overview Quick introduction to the Proficy Historian

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using accessing historian data

Using & Accessing Historian Data

Understanding the Proficy Historian and how to use the Excel Add-in to view plant data

Stephen Friedenthal

617.916.5101 (w) / 617.901.9193 (m)

  • System Overview
    • Quick introduction to the Proficy Historian
    • GreenFuel system architecture
  • Excel Interface
    • Installation and configuration
    • Basic queries (to get our feet wet)
    • A primer on data storage
    • Data retrieval modes
    • Advanced analysis and interactive spreadsheets
  • Wrap-up & questions

Plus! A cool (?) bonus… a sample Excel report you can use when you’re done!

introduction to the ihistorian
Introduction to the iHistorian
  • Key features
    • High-speed collection & retrieval (20k/sec)
    • “Understands” time-series data
      • Able to provide time-based data aggregation (min, max, average, etc.)
      • Data compression (“dead banding”)
    • Robust data collection from plant floor
    • Event & time-driven calculations on historical data
    • Near real-time access to plant data
    • Store/add comments with data
historian introduction cont d
Historian Introduction (cont’d)
  • Additional Features
    • Easy-to-use
      • THEeasiest to use, fastest to install and configure, and lowest maintenance historian available in the world today (really!)
      • Information access is easy without requiring any specialized training, programming or database skills
    • Security, auditibility & traceability
      • Secure, 21CFR11 compliant application
      • User & role-based security & 100% auditing 100% of the time
    • Analysis and enterprise connectivity
      • A fast, flexible, easy-to-use Client Tools include, Excel, web portal, Plant Applications™, SDK, and OLE DB
getting started

Getting Started

Installing the Excel tool

how to install
How to install…

Step 1: Insert the CD or run the network install

2. Go through the usual prompts and select the Excel add-in, then press Next..

3. Enter the server name and continue with the setup. Example below connects to the server called, “NANO”

how to configure excel
How to Configure Excel

To add the iHistorian Excel “add-in””

  • Select “Tools”, from the menu bar, then “Add-ins”
  • Select “Proficy Historian Add-in” and press OK

Note: If you don’t see the Proficy Historian listed, search for the file, iHistorian.xlaand then use the Browse button to select it.

configuring excel cont d
Configuring Excel (cont’d)
  • After selecting the add-in, Historian will be a new menu item on your toolbar whenever you start Excel.
historian functions

Historian Functions

An overview of some of the thing you can do with the historian Excel add-in

a quick example search tags
A Quick Example – Search Tags
  • A tag search lets you quickly find and display process variables
  • This is usually the first step to retrieving data, since the data is accessed by the tag name
  • Ex.:
    • The tag name for a bio reactor CO2 monitor is GFAZ1.200_AE_245H.F_CV
    • This is then used to retrieve data
performing a tag search
Performing a tag search
  • 6 Easy Steps
  • First, select Search Tags from the add-in menu
  • Enter the search criteria for the tagname (blank for all)
  • Select the tags for the report
  • Select outputs
  • Type or select the spreadsheet location
  • Press OK
historian excel add in functions
Historian Excel add-in functions
  • Just as with the tag search, the add-in can be used to:
    • Search Tags
    • Query Current Values
    • Query Calculated Values
    • Query Raw Data
    • Query Alarms & Events (NA for GreenFuel)
    • Query Calculated Data
    • Query Filtered Data
tag search
Tag Search
  • Purpose: To retrieve tag names, description, units, etc.
  • Features:
    • Search by tag name or description
    • Dynamic searching by using a cell address vs. a string (i.e., cell A2 is used for the tag mask)
advanced tag search
Advanced Tag Search

The text in cell $B$2 is used to retrieve tag names

Instead of searching each time, just type a new entry in $B$2

advanced tag search ii
Advanced Tag Search II
  • After you create a dynamic search based on tag name, you can edit the formula in Excel to add the tag description as a criteria
  • Notes:
  • Tag name & description are a Boolean AND
  • Blank = All
  • Wild card characters:
    • * = ALL chars to right
    • ? = single character
retrieving data

Retrieving Data

But first… we need to learn a little about data storage

time series data storage conundrum
Time-series data storage conundrum
  • Data is not typically stored at even intervals, but…
    • We may need evenly spaced reports (e.g., hourly avg.)
    • We need to know what the value is “now” even though new data may not have been stored for a long time
  • We need a way to know “what happened” & when without looking at MB (or GB!) of data

Red marks are raw samples that were stored. (Note different intervals)

historian data retrieval
Historian data retrieval
  • The historian “understands” the nature of the data and:
    • When you ask for the “current value” it returns the last good value (even if it’s hours or days old)
    • When you ask for evenly spaced samples it interpolates the raw data*
    • When you ask for data in between real samples it gives the best interpolated result (e.g., if you ask for the maximum it will return an interpolated maximum)

* Note that Lab data and Trend Sampling do not interpolate or smooth the data

example retrieving current values
Example: Retrieving current values
  • Select Query Current Values from add-in menu
  • Enter the tag names, or use a cell reference from the tag search
  • Select outputs and location
historian calculations

Historian Calculations

Now for the fun stuff…

different ways to retrieve data
Different ways to retrieve data
  • Sampling Modes
    • Interpolated – Just like it sounds, historian interpolates between raw samples and return results based on the time interval (e.g., every 30 min.) or number of samples
    • Calculated – Historian will perform one of several aggregate calculations (min., max., avg., etc.) on the data and return results (more on this in a bit)
more ways to retrieve data
More ways to retrieve data
  • Lab – Strangely named, but Lab sampling returns “raw” values, evenly spaced by a user selected interval.
    • For each interval it returns either (1) a raw sample that was stored at that time, or (2) the last good value that was stored
    • Very useful when you don’t want any interpolation or smoothing
    • Primarily used to trend “raw data”, with evenly spaced samples to make nice charts
lab sampling example
Lab sampling Example

Lab Sampling, 5 Min. Interval

Actual raw data stored

trend sampling
Trend Sampling
  • Trend Sampling solves a problem that few realize is there, but can be critical:How do know that you are seeing all of the extrema of a process?
  • Not necessarily an issue over short time periods with short retrieval intervals, but what about longer time periods?
trend sampling example
Trend sampling Example

Lab Sampling, 5 Min. Interval

Actual raw data stored

  • See the problem??
  • With 5 Minute sampling, we see a smaller peak
  • With 30 minute sampling we don’t see the peak at all!

Lab Sampling, 30 Min. Interval

trend sampling cont d
Trend sampling (cont’d)
  • Trend sampling solves the dilemma by returning a High-Low pair for each time interval
  • Trend sample divides the interval in half and returns the high or low value (whichever occurred first) for the middle time sample
    • We never miss a maximum or minimum extrema – regardless of the sample interval
    • Able to get a very good view of the process with only a small sample of data (e.g., review a year of data with month-long intervals)
    • Note that the time of the min/max is NOT the actual time of the raw data
raw data queries

Raw Data Queries

When you just want the beef

raw data queries33
Raw Data Queries
  • Raw data queries let you access the raw, unfiltered data
  • Very fast, but some caveats:
    • A typo can cause A LOT of data to be requested
    • Excel can’t handle more than 64,000 rows
    • Because the source data is stored only on a change, raw data can be confusing
      • You may get no data back based on your start & end dates
raw data query options
Raw Data Query Options
  • Options
  • Select start & end dates (but you must select an output range large enough to hold the data)
  • Select a time and ask for a number of samples forward or back from that point (you only need to select the first cell of the output range in this case)
advanced topics

Advanced Topics

But wait… There’s More!

filtered data queries
Filtered Data Queries
  • Filtered queries let you retrieve data (lab, interpolated, calculation, or trend) for one or more tags, based upon the value of a different tag
  • For example, retrieve conductivity based upon pH or temperature
filtered data query menu
Filtered Data Query Menu

Same as Query Calculated Data menu

Enter the filter tag (e.g., algae temperature), and the condition (e.g., <= 90)

create tags import and modify data
Create Tags, Import and Modify Data
  • Administration functions
    • Create, modify tag properties
    • View on-line archives and storage status
  • Data storage functions
    • Export data, import new data, modify stored data*, even add comments to stored data
  • Audit functions
    • Export and search audit trail, import new audit messages

*But, don’t worry.. The original value is still retained