Wattmon EMS

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== LASTCHANGE() Function ======

The LASTCHANGE() function can be used to get the last time a variable was changed - it returns a human readable time.

Usage:

''LASTCHANGE(variable, options, val)'' 

**variable** - the variable name to check

**options** - see below

**val** - optional - the value you wish to check for

===== Generic Variables (per device type) =====

''LASTCHANGE('genset_on',1)'' 

Get the last time that the genset_on variable was changed today

''LASTCHANGE('inverter_state',1,3)'' 

Get the last time that the inverter_state variable was equal to 3 or 0


===== Device - Specific Variables =====

For device specific variables use a . to separate the device name:

''LASTCHANGE('My Device.My Value',1)''


===== Option Parameters =====

The second parameter, [options] is a number and can be any of the following

|0 | Returns //No Change// |
|1 | DAY - Last time the variable changed during the day |
|2 | WEEK - Last time the variable changed during the week |
|3 | MONTH - Last time the variable changed during the month |
|4 | YEAR - Last time the variable changed during the current year |
|5 | PERIOD - Last time the variable changed during the  selected range |
|6 | SLICE - Last time the variable changed during the slice in the range (i.e. in a graph segment) |


===== Example =====
Get the last time the variable changed this week

''LASTCHANGE('delta0_kwh',1)''

Possible return value: //Tuesday, May 8, 2017 14:58//

Wattmon EMS

User Tools

Site Tools

Page Tools