Siemens OZW672 Series, Commissioning Instructions, Page: 63 / 116

63 / 116
Siemens Web server OZW672... V4.0 CE1C5712en
Building Technologies "Energy indicator" function 28.08.2012
5 "Energy indicator" function
5.1 Introduction
5.1.1 Function description
Function "Energy indicator" is available on the OZW672… web server from V4.0.
The web server uses the "Energy indicator" function to read selected data point
values from the LPB and BSB bus devices and to compare the values to energy-
related limit values, or so-called "Green limits".
The data points are also monitored for adherence to the "Green limits". As a result,
the "Energy indicator" is displayed in the form of a tree leaf.
The monitored data points and their "Green limits" depend on the device type. The
following applies e.g. to a controller:
Monitored data points "Green limits" (technical energy limit values)
Comfort setpoint >21 °C
Reduced setpoint >15 °C
Setpoint readjustment >± 1.0 K ( ± readjustment has 2 "Green limits")
Operating mode Automatic, Reduced, Protection  "Green leaf"
Comfort / Continuous  "Orange leaf"
The "Green limits" are used only together with the "Energy indicator" function. They
do
not represent process or safety limit values which trigger e.g. fault messages or
turn off the plant in the event of limit violations.
Users also are allowed to change data point values (setpoints). E-mail messages
from the system then remind the user that a value or values were changed.
"Green leaf"

Green tree leaf, leaf pointing up.
• The "Green leaf" symbol indicates that a data point value has not exceeded
its "Green limit", i.e. the value is within a "green" range in terms of energy con-
sumption.
"Orange leaf"

Orange tree leaf, leaf pointing down.
• The "Orange leaf" symbol indicates that a data point value has exceeded
its "Green limit", i.e. the value is outside a "green" range in terms of energy con-
sumption.
"Gray leaf"
 Gray tree leaf, horizontal leaf.
• The "Grey leaf" symbol indicates that a data point value is not current,
e.g. transmission of a data point value is incomplete, or there is no data commu-
nication with the bus.
• The data point is not monitored via the "Energy indicator" function.
The "Energy indicator" function is based on standard EN 15232 "Energy efficiency
in buildings".
"Energy indicator"
function
Monitored data points and
their "Green limits"
Notes
Tree leaf as
"Energy indicator"
Green leaf
Orange leaf
Grey leaf
No tree leaf
Standard EN 15232