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Found 14 results

  1. FAQ: I've got a signal with drop-outs and I want to filter my signal to only visualize samples with values above a threshold. Is there a quick way to do this in Seeq? Solution: We can use Seeq's Signal Filtering capabilities to break down a signal into individual samples and create a new signal that keeps the samples only above your specified threshold. 1. Visualize your signal with drop-outs and determine the threshold value. For this example, we will filter out all samples with a value of less than or equal to 40F. 2. Open a new Seeq Formula window and use th
  2. Hi lots, Is there a functionality of "If...then...else" statements in formulars. Or is there at least a workaround? Thanks for your answer in advance!
  3. Hello there, In my worksheet, I used formula function to create a signal used in my boundary. i.e, 0.tosignal(). I found this signal only shows in the worksheet I created, not the others. if there a way to pin this signal? so that i can reuse the signal i have created. Thank you
  4. It is often useful to create a scorecard metric that displays a signal name for use in Organzier Topics. This is relatively simple using Formula and the toSignal() function. This Formula creates a string signal that has a value of "Signal Name" for all of time. After I have my string signal, I can use a simple scorecard metric with no statistics to create a scorecard that just displays the value of this string. I have changed the header to only display the end time. Now, I can use this scorecard in an auto-updating Organizer Topic that will always show "Signal Name".
  5. Overview Often times two (or more) units that the same products and unit procedures. This is common in continuous processes that are running a specific "grade"; also in batch processes that are manufacturing the same product ID. Since they are identical pieces of equipment or units, the “profiles” of critical process parameters are similar and we want to use profiles from multiple units for our reference profile. In this example we will create a profile from 2 units - the same process can be applied for additional units ad infinitum. Then we will apply this profile to a running batch to
  6. Summary There are many use cases where the user wants to do an aggregation over a periodic time frame, but only include certain values. Examples abound: for cement calculate the average daily clinker production only when the kiln is running, for biotech pharma the standard deviation of dissolved oxygen only when the batch is running, etc. Here our user is looking into equipment reliability for compressors. She wants to calculate the average daily compressor power to examine its performance over time. Steps 1. Add the signal into Seeq. 2. Use the 'Periodic Condition'
  7. Background: I have a sensor that shows a step change in the amplitude of the signal noise a couple of days prior to instrument failure. It would be useful to be able to identify that step change in the amplitude of the noise so that preventative maintenance can be scheduled rather than running the instrument to failure and causing an unplanned shutdown or production loss event. Solution: Use a combination of Formula and the Value Search tool to identify when this increased signal noise is occurring. Starting signal: 1. Use Seeq Formula and the runningDelta() a
  8. Background: Sensors or calculated tags that totalize a value over time often need to be reset due to maxing out the range of the sensor or the number of available digits in the calculation database. This can create a saw-tooth signal that resets every time this range maximum is reached. In actuality, the signal is constantly increasing rather than building up to the range max and then stepping down to zero to begin counting back up towards the max. Solution: Use Seeq Formula to convert the saw-tooth signal into a continuously increasing signal bounded in time by some rese
  9. I'm trying to display large values with more significant figures. For instance, annual reporting of large quantities via scorecard only display scientific notation rather than the actual value received within our historian database.I need to be able to display at lease nine significant figures within the score card and be able to view the trend line with the same number of significant figures. Anyone have any thoughts as to how this can be accomplished? Thank you,
  10. Hi all, I have created a workbench with three temperature signals (x, y, z) and I have added six value search conditions (x Hi, x Lo, y Hi, y Lo, z Hi, z Lo). A High and Low condition for each signal. This has created a list of 95 capsules for the six conditions. I am exporting the summary data to excel. The information tab contains a list of my 95 capsules. However, the Capsule Summary tab contains a list of 285 line items. I am seeing the information for all three signals against each capsule ID, rather than just the signal that capsules condition was configured against. I hav
  11. A common analytics need is to create a signal with numerical values that are based on an existing condition. Users often want to translate a condition (on/off, good data/bad data, running/down, etc.) to a numerical value to be used in calculations. For example, a user may want to multiply a process signal by a 0/1 value based on when the process is down/running. This technique can also be used to replicate "if" logic or "if / else" logic, where different values are returned depending on if the condition is true/false. Converting a condition to a signal value can be easily accomplished in
  12. FAQ: I've calculated a scorecard metric that I want to use in a calculation of a condition. While the scorecard metric is visible in trend view, it is not provided as a signal choice in the drop-downs on the tools or in the Seeq formula window. Can my scorecard metric be used in calculations of other signals/conditions? Answer: In the versions of Seeq currently available (R21.0.41 or earlier), the scorecard metric tool does not actually create a signal despite being able to be viewed in trend view. The signal from condition tool requires the same input arguments and produces the same outp
  13. FAQ: I want to create a condition where a trend is within a specific range of slope so as to identify instances where it falls inside and outside these ranges. Is this possible? Solution: This can be easily done using a combination of the Formula and Value Search tools in the sequence below. Use formula to calculate a new signal that is the derivative of the original signal. Formula code is: $signal.derivative() Note - if the original signal is step interpolated, the derivative returned may have infinite values. If it is step interpolated, it is best to first change the inte
  14. Hello, Using Seeq Tools, are there ways to easily calculate the change in value from one sample to the next, as well as the corresponding sample time? These types of calculations can be useful in a variety of applications (e.g., tank fill/drain, irregularly spaced process samples, equipment status transitions, etc.). Ted Williams
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