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LATEST NEWS
20
Increasing Production Line Performance and Reducing
Operations Costs with IoT Technologies
24
M12 connectors become more reliable, easier to fit
and
reduce installer injuries
26
Design an optimized circuit for HART-enabled 4- to
20-mA inputs
30
Expanding
Frequency
Range
in
High-Power
Splitter/Combiners by Minimizing Resistor Capacitance
34
ASICs
allow
cost-effective
IP
protection
for
technology inventions
38
A Recipe for Embedded Systems
42
Connector selection crucial for high performance industrial
applications
44
Intelligent Gateways Make a Factory Smarter
52
Manage the IoT on an Energy Budgetpart 1
60
OUT OF THE BOX
62
New Products
82
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Contents
An intelligent gateway powered
by the Zynq SoC enhances
productivity in a state-of-the-art
manufacturing plant.
The Industrial Internet of Things-
on-Chip engineering S.L. (SoC-e),
streamlines productivity and helps
companies like Microdeco become
more reliably connected and secure.
To maximize profitability, factories
In order to achieve
callingthe“fourthindu
factories need infra
systems to use the IT
for automated produ
Intelligent Gateways Make a
Factory Smarter
Armando Astarloa, System-on-Chip engineering S.L
Executive Summary
Equipment maintenance personnel are
tasked with keeping the production
line running at peak performance while
minimizing operations costs. This is made
more difficult by the need for specialized
skill sets to support a wide range of
factory devices that use different
communications protocols, data formats,
and device management tools, etc.
Greatly simplifying this task, it is possible
to seamlessly
link factory floor devices and processes
using technologies from the Internet
of Things (IoT), thus enabling remote
equipment monitoring and management
from a centralized dashboard.
Providing such a solution, the SUSIAccess*
remote management system from
Advantech* allows maintenance personnel
to perform equipment status and
maintenance checks from a web browser
at any time, from anywhere, and with any
connected device. The factory automation
solution uses an Intel® processor-based
gateway running an Advantech client-side
agent to transparently handle protocol
and data conversion, and acts as a conduit
between manufacturing equipment
and the Advantech server-side software.
This solution can interoperate with
high-level applications such as data
analytics and machine learning. This
paper details the benefits and the key
ingredients of the solution.
Key Business Objectives
Increase production line performance and
reduce operations costs without sacrificing
quality.
Business Challenge
Although large manufacturers have
been using statistical process control
and statistical data analysis to optimize
production for years, the extreme
complexity of today’s data provides
opportunities to deploy new approaches,
infrastructure, and tools. The challenge
is figuring out how to cost-effectively unify
device management, control, and data
analytics.
In addition, manufacturers need a real-
time device management platform that
enables them to address maintenance
issues on a timely basis. Today, there are
many disparate manufacturing sy
with their own management tools,
makes maintenance cumbersome
time consuming.
Solution Beneits
Revolutionizing
factory
equip
management in the IoT era, the Adva
SUSIAccess remote management sy
delivers the following advantages:
• Reduced Total Cost of Owner
(TCO):
Saving time for mainten
personnel, centralized remote monit
continuously checks factory floor de
and sends alerts to their mobile de
as needed. Power usage may be low
by automatically powering systems o
according to a preset schedule.
•Improved
Production
Performance:
Machine data aggreg
by the SUSIAccess server is proce
by big data analytics to uncover wa
increase product yields, improve
predictive maintenance, and ide
manufacturing problems more quickl
• Easy Integration:
The sol
provides a comprehensive, seam
device monitoring and control system
Increasing Production Line Performance and
Reducing Operations Costs with IoT Technologies
Advantech-Intel
20
ngineers never lose sight of
the need to deliver projects
that hit the quality, schedule and
budget targets. You can apply the
lessons learned by the community of
embedded system developers over
the years to ensure that your next
embedded system project achieves
those goals. Let’s explore some
important lessons that have led to best
practices for embedded development.
THINK SYSTEMATICALLY
Systems engineering is a broad
discipline covering development
of everything from aircraft carriers
and satellites, for example, to the
embedded systems that enable their
performance. We can apply a systems
engineering approach to manage
the embedded systems engineering
life cycle from concept to end-of-life
disposal. The first stage in a systems
plan defines the engineering life cycle
for the system and the design reviews
that the development team will
perform, along with expected inputs
and outputs from those reviews. The
plan sets a clear definition for the
project management, engineering
and customer communities as to the
sequence of engineering events and
the prerequisites at each stage. In
short, it lays out the expectations
and deliverables. With a clear
understanding of the engineering
life cycle, the next step of thinking
systematically is to establish the
requirements for the embedded
system under development. A good
requirement set will address three
areas. Functional r quirements define
how the embedded system performs.
Nonfunctional requirements define
such aspects as regulatory compliance
and
reliability.
Environmental
(for example, EMI and EMC). Within
a larger development effort, those
requirements will be flowed down
and traceable from a higher-level
specification, such as a system or sub-
system specification (Figure 1). If there
is no higher- level specification, we
must engage with stakeholders in the
development to establish a clear set
of stakeholder requirements and then
use those to establish the embedded
system requirements.
Generating a good requirement set
requires that we put considerable
thought into each requirement to
ensure that it meets these standards:
1. It is necessary.
Our project
cannot achieve success without the
requirement.
2. It is verifiable.
We must
E
A Recipe for
Embedded Systems
Adam Taylor, e2v
he advantages over traditional
circuits include less bo rd
space and lower cost.
The highway addressable remote
transducer (HART) protocol allows for
bi-directional 1.2/2.2-kHz frequency
shift keying (FSK) modulated digital
communication over traditional
analog 4- to 20-mA current loops.
This allows for interrogation of
the sensor/actuator, and provid s
significant
advantages
during
equipment installation, monitoring
and maintenance. HART provides
benefits to m intenance crews using
a portable secondary device to
interrogate the sensor/actuator. But
to fully realize all the benefits HART
can bring, the sensor/act ator must
be connect d to a contro system
with HART ena led current inputs or
outputs.
Let's focus on the HART FSK transmit
circuitry. Figure 1 shows a traditional
approach. Rsense converts the 4- to
20-mA signal to a 1- to 5-V signal to
be read by an ADC. The HART FSK
transmit circuitry AC couples ±500-mV
HART FSK signals to the 4- to 20-mA
loop via C1. These signals are either
sinusoidal or trapezoidal waveforms.
A good buffer with enough drive
strength is required at the HART
modem's output as the Rsense
represents a low impedance and there
may also be significant capacitance
on the current loop cabling. When
the HART isn't transmitting, the buffer
output would present a low impedance
to the loop which could compromise
the 4- to 20-mA signaling. For this
reason the switch, SW1, is used
in series with the buffer output to
provide a high impedance when not
transmitting.
The 4- to 20-mA loop can swing
betwee 1 and 5 V while SW1 is open.
As this change is AC coupled to SW1,
the switch could see up to ±4 V at its
input. Hence, a bi-polar supply of ±5
V or more would be required for the
switch, or alternately an opto-switch
could be used. A tri-state buffer is
anoth option, though gain this
buffer would require bi-pol
Another option is to use
isolat on. Given the H
frequencies, an audio
would be required which is
bulky and consume a larg
board area.
Figure 2 shows an impr
FSK transmit circuitry de
reduces space and co
circuit, the AD5700 HART
enough drive strength t
±500 mV FSK signals di
the current loop without t
an external buffer. When
isn't transmitting, the AD
output is biased to 0.75V
impedance. R2, R3 provid
0.75-V ias, ith AC im
R2||R3 = 1.7 kΩ. The
filter formed by the this
C1 ensures that the wor
20-mA input signal, which
at 25 Hz across the 200
only results in the HART
output being drive to bet
1.5 V. This means that the
T
Design an optimized circuit for HART-
enabled 4- to 20-mA inputs
DERRICK HARTMANN & MICHAL BRYCHTA, ANALOG DEVICES
www. new- techeurope . com
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