PROFINET helps GE make appliance manufacturing leaner

Moving at the speed demanded in today's business environment, where stiff competition means new products must be made and introduced faster than ever before, requires technologies that simplify production start-ups. For GE Appliances, those technologies include the Profinet industrial Ethernet network.

Profinet provides the backbone for a new lean manufacturing system that is producing GE's latest home laundry appliance, a high-efficiency (HE) top-loading washer. By reducing the time and cost to install new production lines at GE's 900-acre Appliance Park in Louisville, KY, the Profinet network helped GE bring its innovative washer to market in time for the 2012 holiday buying season.

Explaining why Profinet was chosen for the new HE washer production lines at Building 1, Home Laundry, a 1.3 million square foot facility with approximately 1,300 employees, Robert Frank, senior advanced manufacturing engineer, says: "We needed to shorten the cycle time for building and installing new manufacturing equipment.

"The machine that fabricates the washer apron (the front and sides of the new topload washer) has approximately 500 input/output points. With traditional wiring practices, 1500 individual wires would have had to be cut, stripped, numbered and terminated. We also would have had to disconnect and reconnect 500 of those wires when the equipment was shipped from the machine builder to our facility. All of that wiring was replaced with 15 Profinet and 15 DC power cables."

Profinet also made it simple to connect valves from the compressed air system used in washer assembly Frank says: "The valves need to be located near the devices they are powering - bringing compressed air to a cylinder, for example. Profinet eliminated the wiring and conduit needed for traditional hard-wired valves. The valve packs also have the capability for inputs, so the sensors used to verify that the cylinder has moved can be plugged into the valve pack, which eliminated the wiring for those devices as well."

Profinet's ability to provide the same capabilities in less time and at lower cost was a deciding factor. Frank explains: "We were looking for less time to implement new products and we wanted Profinet to take less time to build our equipment. But we also wanted the performance to be no different than what we had been getting with our previous method of wiring equipment. Profinet saves us time and, in the end, the result is invisible - it just gets there faster."

Staff familiarity with Ethernet technology assures reliable network support, added Frank. "One of the factors in choosing Profinet was that it is Ethernet technology, which is very widely used. There's a much better understanding of it than there is of some small proprietary network that might only be around for a few years. We expect Profinet to be around for a long time."

Lean transforms manufacturing

The transformation at the Home Laundry facility is part of a $1 billion investment GE is making, most of it at Appliance Park, to revitalise its global appliance manufacturing operations. By introducing lean manufacturing principles and technologies such as Profinet to reduce costs and improve competitiveness, GE expects to launch 11 revitalised product lines over the next few years, and in the process create more than 1400 new jobs in the U.S.

Frank says: "Lean has changed production processes through simplification. Instead of bigger and more complex, the process has taken the facility back to basics. De-complication is one of the biggest gains through lean production." Lean has also fostered greater teamwork between sourcing, technology and manufacturing, as well as stronger partnerships with suppliers.

GE sources manufacturing equipment from machine builders in many countries, so their comfort with Profinet was a major consideration. Frank notes: "It seemed like all the suppliers we looked at were offering Profinet solutions, which was important since it is the preferred Ethernet network for GE Intelligent Platforms automation solutions. The suppliers that build the equipment, they've been pleased with it also. They like the ease of starting it up and the reduction in the man hours required to install equipment and get it up and running."

Frank pointed to Profinet's open standard as a corporate-wide advantage for GE. "We have plants around the country, not just in Louisville. Different plants will use different equipment because they have a different supplier base that's local to them. Profinet lets us use multiple suppliers, so we can standardise on how we're doing things but have enough flexibility that plants at different sites can still utilise their local base of suppliers and get the support they've always had."

Flexibility, now and in the future

Frank sees the flexibility of Profinet as a key benefit. He says: "It is a scalable solution. It will work well on a long production line, where everything is spread out. It will also work on a more compact piece of equipment where there is a lot of I/O concentrated. In fact, the greater the number of I/O, the greater our savings.

"In addition, as we start up a new factory, there are always things that end up changing; you want to try something or add something or change things. What's nice is that Profinet allows us to add things easily. We can install a Profinet block and add some I/O or an additional valve pack. It really helps as we're getting up and running. It saves us a lot of time when we have to make an alteration like that."

Frank expects Profinet to benefit GE appliance manufacturing far into the future. He comments: "Profinet contributes in several ways. By reducing the cost of equipment, it frees up investment dollars to be spent on new products and features. And by reducing implementation time, products reach the consumer faster. The ease of adding or changing a machine allows new features to be implemented faster and for less cost. The result is that we can come out with more new products, so the consumer is the big beneficiary in all of this."

For further information on the Profinet industrial Ethernet network please visit www.uk.profibus.com.

The Profibus Group

Suite 183
19 Lever Street
Manchester
M1 1AN
UNITED KINGDOM

+44 (0)208 144 9597

uk@profibus.com

www.profibusgroup.com

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