23-零售行业-EN

Application Case
History Building a grocery store Facility Control System Introduction
This company is a large regional retail grocery food chain. The chain presently consists of 134 stores located primarily in the Western states. This family owned and managed business originated over 50 years ago in California. They were first to innovate many customer service enhancements: the drive-in market, the “pre-packaged” meat department, the side-by side grocery and drug store, a.k.a. “Superstore”, and the supermarket natural foods department. They sell all of the national brands as well as their own store brands on both the grocery and pharmacy sides of their business.
Application
This application involved the design, engineering and installation of a “Facility Control System” (FCS), similar in nature to a “Building Automation System.”This system automates, controls and monitors a variety of facility functions including:
•Emergency back up generators and UPS network
•Energy management and lighting control systems
•Environmental Control System including the HVAC, chillers, boilers •Refrigerated Display Case Control
•Security & Fire Systems.
Prior to this installation, the customer employed a “closed architecture” automa-tion system, which was specifically designed for grocery store facilities control, to perform some of the same tasks.
The legacy system met the customer’s originally envisioned functional needs. However, over time, the limitations of the legacy created two sources of dissatis-faction. First, the customer was required to use only control components available from the legacy provider for all system expansions or MRO purposes. This invariably limited available technology solutions as well as drove up both operating and capital project costs. Second, the ability to integrate the legacy system into a current field bus, communications and IT network was both limited and expensive to implement.
Objective
The legacy system provider has not kept technically current. The objectives of this application are to provide the Customer what he demands:
•Enhanced access to facility data for more levels of their geographically distributed management.
•Straightforward connectivity of dissimilar facility sub-systems, eg, HVAC and lighting, which are purchased from different manufactures offering different field bus alternatives.
•Installation of the new system into the physical space available.
•
Implementation / start-up without impact to the customer’s customers.
Solution
Grocery Store Facility Control Systems differ substantially from those employed in other commercial building automation applications.
• A large proportion of the physical architecture and layout is retail space, open to “Customer T ouch” and viewing.
•Refrigerated display cases spread throughout the store represent “Islands of Process Control” that must be automated and monitored centrally.
In order to live within the space envelope available for the control equipment, and similtaneously provide a solution to support the diverse distributed I/O structure, a hardware platform combining Premium and Momentum products was chosen. The N.R. & D. “Thermistor Momentum Base” totally differentiated our solution. No other Industrial PLC Manufacturer currently offers a “Thermistor” Input device for their equipment.
The second differentiating factor was the ease and cost of implementing an Ethernet Network to connect both the Remote I/O Structure and the companies IT Network.
Benefits
•Open architecture, off the shelf access / availability to standard control components.
•Easy to implement connectivity using a universally accepted protocol, Ethernet TCPIP.
•An implementation / migration path from their legacy system to the new FCS that can be accomplished without impacting their customers.
Document Number: LanceLanghorstCRN.pdf
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