Sunday, March 9, 2008

How to globally override Delimited Configuration Properties

How do you globally set devices to take certain config property? For example I want to globally set all Distech VAVs on my project to persist Occupancy setting. Other words, I would like to write occupancy command once and have the controller keep (persist) the setting over power outages. Here we assume that the InetSupervisor is installed on your computer including the LNS Driver Service.

We have to use the LNSConfig application that comes with the InetSupervisor CD dated March 10, 2008 or later. Open the LNS Config and go to global override page for enumerated config properties. Then follow these steps:

  1. Click on GetChannels to query the LNS network for all available channels
  2. Click on a channel where one of the typical devices is located.
  3. Click on a device you like to use as a template.
  4. Click on a Config Prop to select the property of choice.
  5. You now will be displayed with information about the config property. You will have to enter your new information into text boxes.
  6. Enter you delimiter. This is a character that delimits each individual value within the config property. In our example this would be a space, so press the space bar once to enter it in.
  7. Enter position of the value (value you want to change) as it is located within the delimited array of values in the config property. This is a zero based array. So in our example this would be 45. Each space delimits the actual values so you count the position starting from zero at left all the way to position of the value you like to change.
  8. Enter the value. In our example this would be 1.
  9. Click WRITE and watch the main window for status. You also get a nice log of all activity including errors and successes in the log file located in C:\LonWorks\Apps\Qci\Logs

You now just imagine what you can do with this utility when combined with the Global Override for Variables and the Global reports. Here another scenario:

  • Perhaps on a large Fan Coil Unit project you need to prove that the hot water valves work properly. You can do it by following these steps:
    • Make sure you have how water circulating
    • Use global override to close all your hot water valves.
    • Wait a while and run a global report of valve positions and discharge air temperatures.
    • Use global override to open all valves.
    • Wait a while and run a report of valve positions and discharge air temps.
    • The reports you generated are in a standard XML format you can open in Excel. So open both reports in the same Excel spread sheet and make sure that each device's data for the "before" and the "after" are aligned side by side.
    • Make a simple formula that compares discharge temps of before and after and flags the bad valves the temp difference is less than x or examine the log by hand.

http://www.inetsupervisor.com/Support/default.htm                  "InetSupervisor SUPPORT"

http://www.inetsupervisor.com/Products/Default.htm                "Quark Communications PRODUCTS"

http://www.inetsupervisor.com                                                              "InetSupervisor HOME"

Happy networking.

Adam G.-

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