Arbor Technology ITX-i45M2 Manual de usuario descargar pdf (Pagina 22)

AMD EMBEDDED SOLUTIONS GUIDE

JULY 2013

The Problem with Bifurcation

Handheld portable HMI devices are

frequently tethered (albeit wirelessly) to a

central control panel. And although these

portable systems are designed to be used in-

dependently of the central panel in a physi-

cal sense, operationally the portable device is

designed to serve as a natural extension of the

central system. In some cases, these wirelessly

tethered devices are designed to visually rep-

licate the master HMI display so as to enable

an operator to carry the device through the

production line without sacriﬁcing visual-

ization and/or management capabilities. As

such, there are clear beneﬁts in maintaining

a single, scalable underlying processing plat-

form across both types of systems to ensure a

consistent look and feel between them.

For the HMI system vendor, this single

platform approach yields greater design eﬃ-

ciency and signiﬁcantly leaner cost structures,

enabling designers to develop and maintain a

single uniﬁed software solution and hardware

architecture that can be scaled across the full

product line. ese eﬃciencies are even more

pronounced on the embedded x86 platform,

given the inherent PC-compatibility and

rich ecosystem of industry-standard, x86-

optimized software, applications, operat-

ing systems and development environments

available to designers. x86 support also con-

tributes to greater interoperability with the

enterprise IT network, which introduces ad-

ditional beneﬁts for applications such as secu-

rity and antivirus, system maintenance and

remote administration, helping to integrate

factory ﬂoor and distributed control system

communication with an IT infrastructure

utilizing standard networking protocols.

For HMI system operators, consolidat-

ing on a single processing platform helps

provide a consistent user experience across

handheld portable and ﬁxed-installation

HMI panels. is consistency may make

learning and operating these systems, via a

familiar GUI and feature set, faster and eas-

ier for users. e resulting productivity and

precision control gains can be signiﬁcant.

High-Performance Graphics

across the Board(s)

While lower-performing, mobile-opti-

mized processors can be adequate for some

handheld portable HMI devices, the graph-

Enabling Consistent

HMI Experiences

from Portable,

Handheld to High-

Performance Panels

n the industrial control and automa-

tion domain, continued advancements

in human machine interface (HMI)

technology are driving huge gains in

productivity and usability. With each

new generation of HMI systems, conven-

tional “knob and button” operator controls

are being phased out in favor of touchscreen

interfaces that in many ways mimic the con-

sumer smartphone/tablet experience.

ese software reconﬁgurable multi-

touch HMI panels are designed in part to re-

duce hardware dependencies between the con-

trol panel and the embedded system, allowing

HMI panel designers to more easily modify

the functionality of the system and enhance

the interface over time—similar to the way in

which smartphone designers have jettisoned

most physical push button controls in favor of

reconﬁgurable touchscreen interfaces.

With this continued evolution toward

touchscreen HMI panels, portable handheld

HMI devices are emerging as a valuable com-

plement to traditional ﬁxed-installation HMI

panels, giving system operators greater ﬂexibil-

ity and mobility on the factory ﬂoor, with wire-

less connectivity to the central control panel.

With support for consumer smartphone/tablet-

like interfaces, operators can navigate these

portable HMI devices much like they would

their personal devices, using intuitive gesture-

based input to navigate the GUI (Figure 1).

e advent of portable handheld HMIs

has created a dilemma for HMI system de-

signers, however. ese designers are tempted

to adopt mobile-optimized, low-power

processing platforms for this speciﬁc class

of HMI device, while utilizing higher-per-

forming processor platforms for more graph-

ics- and compute-intensive ﬁxed-installation

HMI panels. is approach introduces sig-

niﬁcant tradeoﬀs for HMI system designers

and users alike. Here we’ll look at some of the

pitfalls of this approach, and also the associ-

ated merits of Accelerated Processing Units

(APUs) as a uniﬁed, scalable processing plat-

form appropriate for both portable handheld

devices and ﬁxed-installation HMI panels.

With the advent of mobile HMI devices, designers can benet

from a single CPU/graphics processing architecture that can offer

hardware and software consistency from small handheld displays to

full-sized HMI and IT systems.

by Cameron Swen, AMD Embedded Solutions

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