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Focus issue:
S-Energy as the basis for attractive service provision
Practice: Measuring, saving, with the option to trade
An example from Facility Management shows how a completely integrated management system can
look: HSG Zander is a leading service provider in the field of integrated facility management. It is impor-
tant to record and analyse all consumption values of a property. As part of a pilot project, a building with
a PCD3 controller and an S-Energy Logger is equipped for connection to a SQL database.
The amount of data recorded from an energy management system can be quite considerable. In additi-
on, several observers have an interest in the data for different reasons: the caretaker on site is interested
mainly in the actual consumption data, while building maintenance staff are more interested in relevant
historical records. If the data are not filtered, the operator can quickly become frustrated or overwhelmed.
The Automation Server therefore allows both the detection and the display of all energy information re-
quired for an exact fit. All available consumption data are recorded initially. It is then presented to target
groups in different user interfaces, and can later adjusted with little effort.
The recorded energy levels of water and gas consumption as well as
four electric meters are read via M-Bus or S0 pulse input and stored
in Excel-compatible CSV file format. This standard interface allow
for easy visualization of collected data or relevant factors from an
upstream software tool. For an analysis across multiple plants and
buildings, a central SQL database is available. This offers the advan-
tage of a powerful, comfortable, and IT-oriented data management
and analysis.
The use of a freely programmable PLC for Power HSG Zander offers
the additional benefit of allowing the operator to intervene in the
regulation and control processes at a later stage, so as to improve
the efficiency of the whole system or of the building.
In general, such adjustments exceed the capabilities
of a qualified electrician. Programmers with experi-
ence of Saia® feel right at home and can access the
built-in functionality of the S-Energy Manager. Only
the additional functions need to be created – which
corresponds to the original function of a system in-
tegrator. The willingness of the operator to invest
more in energy efficiency and external expertise
naturally increases if a familiar system is available as
a fallback.
Perfect Fit: Energy management with
Saia® PCD-controllers
The S-Energy Manager is designed mainly for small
adjustments and additional functions. Mature
automation projects can be implemented using
Saia® PCD controllers – including energy manage-
ment. Especially when there are increased demands
on hardware level or different bus systems need to
be connected, Saia® PCD controllers offer modular-
ity and full programmability. It also makes perfect
sense for the automation of an existing energy
monitoring and management to be integrated di-
rectly, rather than installing a parallel auxiliary sys-
tem. This avoids overlap and provides consumption
data where they most needed.
What do PCD controllers offer in terms of energy
management? The collection of consumption data
A practical example:
an energy management ap-
plication realized with Saia®PCD
controllers. They record gas, wa-
ter and electricity consumption.
All the measurement values are
recorded in a local SQL database
as well as at the company
headquarters.
is a broad field of activity. Consumption meters
come in many shapes and sizes. Different interfaces,
protocols and functions make integration difficult.
Saia® PCD controllers can build on a variety of inter-
faces. S-Energy Manager and Energy meters can be
connected via S-Bus, and meters for water, gas or
cold temperatures can be detected via S0 pulse in-
puts, M-Bus or Modbus. Consumption values can be
used to prepare internal control, logged in CSV files
and used to produce trending information using
web visualization. The controller becomes a highly
flexible, programmable data collector in the field.
From there, it’s only a short step to proactive inter-
vention and control of processes based on actual
consumption. In industrial operations, for example,
a peak load regulator can result in cash savings; in
building automation transparent consumption data
form the basis of future energy projects.
Energy management at the automation level
promises big savings and requires expertise and
engineering skills. A system integrator is therefore
usually assigned to this task. Even in «normal» au-
tomation projects, a greater number of energy-
relevant requirements will be included in future. If a
company can offer energy management in addition
to automation, its volume of orders will increase
and the additional services offered give it a com-
petitive edge.
S0
External
temp.
Room
temp.
Humidity
gas water
Central SQL
Excel
Local SQL
Router
