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Greetings!
Have spent the better part of a day peanut-buttered over the past two weeks trying to set-up meaningful binary trend logs in Johnson Controls Metasys M5...it seems no matter what point attribute I select (STATUS, VALUE, STATUS_DISP, COS_DEF) the trend log data returns either all zeros or is blank. However, the 'Trend History' (the 24-hour history maintained on all points by Metasys) shows clearly that the STATUS attribute is changing from 'On' to 'Off'. But I cannot seem to capture these events in the long-term
trending.
Analog values have been no problem--they seemed very simple to implement.
One objective of this trending exercise is to track equipment starts and stops (i.e. cycles), so while knowing whether a boiler is on or off every 15 minutes is OK, what we REALLY want to capture is the change-of-state events, i.e. when the boiler is commanded to start or stop and when it actually starts or stops. Totalizing run hours would also be helpful.
Can anyone give me a two-minute tutorial? I'm surely overlooking something obvious...
Thanks
Brandon Nichols, PE
Coffman Engineers
Seattle WA
Have spent the better part of a day peanut-buttered over the past two weeks trying to set-up meaningful binary trend logs in Johnson Controls Metasys M5...it seems no matter what point attribute I select (STATUS, VALUE, STATUS_DISP, COS_DEF) the trend log data returns either all zeros or is blank. However, the 'Trend History' (the 24-hour history maintained on all points by Metasys) shows clearly that the STATUS attribute is changing from 'On' to 'Off'. But I cannot seem to capture these events in the long-term
trending.
Analog values have been no problem--they seemed very simple to implement.
One objective of this trending exercise is to track equipment starts and stops (i.e. cycles), so while knowing whether a boiler is on or off every 15 minutes is OK, what we REALLY want to capture is the change-of-state events, i.e. when the boiler is commanded to start or stop and when it actually starts or stops. Totalizing run hours would also be helpful.
Can anyone give me a two-minute tutorial? I'm surely overlooking something obvious...
Thanks
Brandon Nichols, PE
Coffman Engineers
Seattle WA