Echelon i.LON 100 e2 Internet Server - Manual (Page 25)

i. LON 100 Internet Server Programmer’s Reference
Property Description
Enter the of the data point to be written to. The name must
begin with the following prefixes:
• NVL_ for an NVL data point
• NVC_ for an NVC data point
Note: The names assigned to NVL data points follow the naming convention
NVL_[NAME], where [NAME] represents that progammatic name assigned to the
NV when it was created with L
ON M AKER .
For example, if the progammatic name of the NV in L ON M AKER is
nvo01Switch_001, the would be NVL_nvo01Switch. You can
determine the progammatic name of an NV in L
ON M AKER by right-clicking it and
selecting Properties.
The name of the data point field whose value is to be read. This property should be
left empty if the data point is not a structure. If defined, the
property will not be included in the parameter.
An alphanumeric string of up to 128 characters that describes the location of the
data point. This user-defined property is established when the data point is
created. You could use it to organize your data points by physical location or
device.
A timestamp indicating the last time the value of the data point was updated. This
timestamp is expressed in local time, with an appended time zone indicator that
indicates the difference between local time and Coordinated Universal Time
(UTC). UTC is the current term for what was commonly referred to as Greenwich
Meridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England,
which lies on the zero longitudinal meridian. Universal time is based on a 24 hour
clock, therefore, an afternoon hour such as 4 pm UTC would be expressed as 16:00
UTC. The timestamp uses the following format:
[YYYY-MM-DD]T[HH:MM:SS.MSS]+/-[HH:MM]
The first segment of the timestamp [YYYY-MM-DD] represents the date. The
second segment (T[HH:MM:SS.MSS]) of the timestamp represents the local time,
expressed in hours, minutes, seconds and milliseconds. The third segment (+/-
[HH:MM]) represents the difference between the local time listed in the second
segment and UTC. This segment begins with a + or a -. The + indicates that the
local time is ahead of UTC, the - indicates the local time is behind UTC. Consider
the following example:
2002-08-13T10:24:37.111+02:00
This timestamp indicates a local date and time of 10:24 AM and 37.111 seconds, on
August 13, 2002. Because the third part of the segment reads +02:00, we know the
local time here is 2 hours ahead of UTC.
The value currently assigned to the data point.
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