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Found 5 results

  1. How can i create a time based condition for a time interval that isnt in the periodic condition tool? In this case i want to calculate a statistic for my signal (an average or max) every 15 minutes. How can i do this?
  2. 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' or 'Formula' Tool to add a condition for days. This doesn't have to be days, it can be any arbitrary time, but it is usually periodic in nature. To use a custom periodic Condition, consider using the periods() function. For example to do this for days, the formula is: periods(1day) As an example, to change this to 5-minute time periods the formula is: periods(5min) Here are how the days and statistics in the Capsule Pane look for her: 3. Find only the desired values to be used in the aggregate (e.g. Average) statistic. From the values in the Capsule Pane she sees that the average compressor powers results are too low. This is because all the time when the compressor was OFF, near 0, are included in this calculation. She wants to only include times when the compressor is running because that will provide a true picture of how much energy is going into the equipment - and can indicate potential problems. To do this, she creates a 'Value Search' for times to include in this calculation, in this case when the Compressor is ON or > 0.5kW. 4. Create a new signal to only have values *within* the 'Compressor ON' condition. Use the aptly named 'within' function in the 'Formula' Tool. Notice how the resulting Signal in the bottom lane only has values within the 'Compressor ON' condition. Now she can use this because all those 0's that were causing the time-weighted Average to be low... are now gone. 5. Examine the resulting statistical values. She now sees that the calculations are correct and can use this resulting 'Compressor Power only when ON' Signal in other calculations using 'Signal from Condition', 'Scorecard Metric', and other Seeq Tools!
  3. There are many cases where a moving average needs to be monitored. To create any statistic that is associated with a sliding time frame, first use the periods() function in Formula to create the periodic capsules. A few examples are listed below. Intent Seeq Formula 30 day average every 1 day periods(30d,1d) 24 hour average every 1 hour periods(1d,1h) 30 minute average every 5 minutes periods(30min,5min) Once the periodic condition is created, use Signal from Condition to calculate a moving average, max, min, or other statistic. The sliding capsules will appear overlapped in the capsules lane. Refer to the capsules pane to verify the capsules meet your expectation of start time and duration, then apply the desired "moving" aggregation (average, standard deviation, etc.) to any signal with the Signal from Condition tool. Below shows a moving 30 minute average sampled every 5 minutes on the Example Temperature data.
  4. I have a series of data 56 days(5/13 to 7/8) long that represents one interval of shifts at a plant (4 shifts on a 2-3-3-3 schedule). I want to create a signal that is basically that interval of data repeated forever in either direction. The idea would be to be able to use that signal to determine what shift is on at any given time and compare data across shifts. How would I make this 56 day signal into something continuous? Thanks in advance!
  5. Currently I am using the Periodic Condition to be able to view average capacities hourly, however I'd like to know if there is a way to obtain these averages every minute. What I am are trying to achieve here is to be able to see the average capacities every minute of our tags and if at the same time this data could be portrayed as a signal so that we can compare the averages with our original signal in one single lane if both are possible together. Thanks again.
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