Implement Hour Meter function from Modbus Inputs

[fylarxos]

Hello,

I would like to implement a hour counter functionality to my project.
More specifically, I have 4 digital inputs (modbus RTU) which will have to be monitored of how many hours they are "on".

I suppose a script with a timer to add "1" to a data point after the passing of 1 hour is the way to go, any ideas?

[phildunlap]

Hi fylarxos, welcome to the forum!

A script is definitely the way to go. Regardless of the script logic, I would do this with four meta points.

Then I would wonder how exacting you're looking to be. Yes, a script on a timer totaling the elapsed time since last run is one perfectly valid solution, that is responsive at the rate you set the cron pattern. That might look like a meta point like this,

var stats = di.past(MINUTE, 6).getStartsAndRuntime();
if(my.value === null)
  return stats.containsKey(true) ? stats.get(true).runtime/3600000 : 0;
return my.value + (stats.containsKey(true) ? stats.get(true).runtime/3600000 : 0);

on a cron like 0 0/6 * * * ? or perhaps six minutes is not a frequent enough update (your counter would go up by .1 if it didn't go false. You could change this to update as soon as the point went false, but we'll simplify the first value. In this next script, the context point di updates the context...

if(my.value === null)
  return 0;
//if(my.time > CONTEXT.getTimestamp())
//  throw "Timestamps are backward, something is off."; //Possible, but would take some action by user
var stats = di.getStats(my.time, CONTEXT.getTimestamp()).getStartsAndRuntime();
return my.value + (stats.containsKey(true) ? stats.get(true).runtime/3600000 : 0);

Which we could also run on the six minute cron to ensure it gets some sort of update even if the point stays true.

Thanks for asking the question! You may have seen the JavaScript help either in the contextual help or on our https://help.infiniteautomation.com/about-mango-java-script/ page, and in the 3.4.x series both will lead you astray! This thread goes into why a little: https://forum.infiniteautomation.com/topic/3627/not-a-function

I am going to resolve the discrepancies and post in this and perhaps that thread when I do.

[fylarxos]

Dear phildunlap

Thank you for your reply, I will try out your proposed solution.
Thanks again!

[phildunlap]

We resolved after some discussion to bring back the .get() function as used on the help page linked to in my last post. Thanks again for bringing this to the fore! This will be the case in the production 3.5 release.