1. SCADA Vs BMS
SCADA System
 Supervisory Control and Data
BMS System
 Building Management system
g
Acquisition
Meanin
 Electrical power transmission and
distribution.
 All Kinds of buildings.
 Airports.
ge
 Manufacturing and production.
 Power generation, fabrication, and
refining.
 Hospitals.
 Ships.
 Hotels
Usag
 Water treatment and distribution.
 Wastewater collection and
treatment.
 Hotels.
 Schools and universities.
 Oil and gas pipelines.
 Large communication systems.
They monitor and control HVAC,
access, and energy consumption

2. SCADA Vs BMS
SCADA System BMS System
 A Human-Machine Interface (HMI)  A Human-Machine Interface (HMI)( )
which is the apparatus that
presents the process data to a
human operator to monitor and
control the process
 A Human-Machine Interface (HMI)
which is the apparatus that
presents the process data to a
human operator to monitor and
onents
control the process.
 A supervisory (computer) system,
gathering (acquiring) data on the
process and sending commands
control the process.
 A supervisory (computer) system,
gathering (acquiring) data from the
Pl t d di d
mCompo
process and sending commands
(control) to the process.
 Remote Terminal Units (RTUs)
connecting to sensors in the
Plant and sending commands
(control) to field devices.
( C)
System
g
process, converting sensor signals
to digital data and sending digital
data to the supervisory system.
 Direct digital controllers (DDC)
with remote I/O modules.
 Programmable Logic Controller
(PLCs) are used because they are
more economical, versatile,
flexible and configurable thanflexible, and configurable than
special-purpose RTUs.

3. SCADA Vs BMS
SCADA System BMS System
 Life time 12-15 Years  Life Time 7-10 years
 More robust material
 Control actions is taken by the
RTU’s and PLc’s in max 250
y
 Economical material.
 Control actions is taken by the
DDC within 2 to 2.5 seconds.
nce
RTU s and PLc s in max 250
millisec.
 Redundancy is a standard in the
HMI computers.
DDC within 2 to 2.5 seconds.
 Redundancy is optional.
Alarms performance ithin 40 50
rforman
 Alarms performance within 15 sec.
 Very fast trending and logging of
historical data and alarms.
 Alarms performance within 40-50
sec and depends on the alarm
Que.
 Trending and logging happens
Per
 Trending and logging happens
with normal speed and aso
depends on each vendor.

4. SCADA Vs BMS
SCADA System BMS System
 Not so familiar with the HVAC  Specialized in the HVAC protocols
ges
standard protocols ( Bacnet,
LONWORKS) it uses either
Modbus or Profibus
p p
DDC controls can communicate
with either Bacnet or LONworks.
 Very open to third party interfaces
dvantag
 Very week in third part interface
and should be by modbus or
Profibus only.
Hi h i iti l t
(Power meters, variable speed
drives, ..etc)
 Lower initial cost.
es/Disad
 Higher initial cost.
 Higher operation cost as it needs
qualified and trained people for
operation
 Lower operating cost.
 Lower spare parts.
vantage
operation.
 Higher spare parts
Adv