====PREV_====

Used to get the asset ID of a the previous (first upstream) asset from the [[owning asset]]  on a particular relationship.

===Parameters===

**Relationship Name**: The name of the relationship you want to use.

**Property Name**: The //optional// name of the property you want to display.

===Example===

This is often used to show information from neighbours. For instance, if you have machines feeding product to one-another, or similar machines in a row. 

You could use the following code....

<code>
connection.Subscribe("[PREV_Sequence_Pressure]",function (val) {
		$('#temp').html(parseFloat(val).toFixed(1) + " kPa");		
	});	
</code>

This is replaced with the [[ardi point code|point code]] of the //pressure// of the asset that is upstream on the //sequence// relationship.

===See Also===

This is the opposite of the [[NEXT_]] function.