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AT-50B system controller

• 5” backlit LCD touch screen
• Usable to manage 50 groups of up to 50 indoor units
• Individual or collective group control, with groups displayed in grid, list or group format
• Dual-Setpoint function
• View and set setpoint temperatures in 0.5°C increments
• Two weekly timers (for seasonal switching) and one daily timer
• Simple connection with single non-polarised two-core wire
• ME M-Net addressing technology
• Two function buttons programmable to access any of a choice of functions (Night Set-back, weekly hour timer setting, switch operating mode, adjustable temperature range restriction, local restrictions)
• Recommended for controlling a single system

The management and supervision technology used for VRF-HVRF CITY MULTI systems is based on continuously evolving solutions borrowed directly from the Internet.

Ethernet - A global standard

Ethernet is the most widely used local area data communication network technology in the world. The key advantages of this communication tech- nology are its low costs and simplicity of installation and operation. Conceived originally for connecting PCs only, over time, the Ethernet net- work has grown to become the most widely used means for connecting not only other office devices (printers, fax machines, scanners, photocop- iers), but also for connecting a multitude of other devices and transmitting a wide variety of different types of signal, from audio and video signals to, in the case of Mitsubishi Electric applications, data for WEB Server 3D centralised controllers.

The main reason for choosing this technology is that it makes it possible to use an existing single wired network extending throughout the entire building. A network connecting a geographically limited area is denominated LAN (Local Area Network). A LAN network is often limited locally to a single site. The term WAN (Wide Area Network) indicates a set of devices or LAN networks connected over an extended geographic area. These may often be connected either by telephone line or with other forms of con- nection (such as broadband ADSL, fibre optic lines or satellite link). One of the largest existing WAN networks is the internet.

What is a WEB Server?

The primary function of a WEB Server device is to deliver web pages in response to requests from network clients. This means being capable of delivering HTML documents and all other types of additional content which may be included in these document, such as images, styles and JavaScripts. A client, which may simply be a standard web browser such as Internet Explorer®, initiates communication by sending an HTTP request to the Web server. The Web server then responds by delivering the requested content. This means that it is not necessary to install any additional software on the client, which may therefore be any PC (not necessarily dedicated to this application) with internet access.

Mitsubishi Electric WEB Server centralised controllers use Ethernet as the data link protocol for LAN (Local Area Network), via a specific RJ-45 connection indicated for use with the TCP/IP suite of internet protocols. To enable this communication, an IP network address must be assigned to each WEB Server centralised controller connected to the network.

Web Browser monitoring and control functions

WEB Server centralised controllers make it possible to monitor and manage the operating parameters of all the indoor units in the installation from any PC on the same local network (LAN or Wi-Fi network of controller) via a web browser.

From this screen, the administrator may also check for malfunctioning indoor units and prevent units from being unintentionally left running for prolonged periods of time.

Management, functional and monitoring capabilities of new Mitsubishi Electric controller systems

WEB Server centralised controllers support the management, operational and monitoring capabilities of all the new functions offered by the new PAR–U02MEDA remote controller. Information concerning occupancy, light levels, relative humidity in the indoor space and dual setpoints etc. is accessible directly from the display and via the WEB.

Integrated management of impulse meters

WEB Server centralised controllers are capable of acquiring the output signals from wall or electrical cabinet mounted digital impulse consumption meters. With the centralised controller, it is now possible to monitor the consumption of the installation with any electric power (WHM), water, and gas consumption meters and calorimeters producing an impulse type output signal.

Up to 4 digital meters may be connected to each individual centralised controller. The administrator may monitor the status of the meters connected to each controller and:

• View real time consumption values
• View consumption graphs
• Export consumption billing data in CSV format for consumption apportioning (CHARGE).

Error list

List of currently active errors.

CHARGE consumption metering and apportioning system

The Charge consumption monitoring and apportioning system may be used to meter the consumption of electric power, thermal power and water for air conditioning, air and/or water heating and domestic hot water production with a Mitsubishi Electric VRF-HVRF CITY MULTI system, and calculate individual usage values.

The AE-200 and EW-50 CHARGE systems use proprietary Mitsubishi Electric calculation and apportioning methods. This consumption apportioning method indicates the consumption parameters of each user as percentages of the total consumption of the system. Consumption values, as percentages and kWh, may be calculated separately for:

• Indoor units
• Ecodan HWS Hydronic Modules
• Ecodan ATW Hydronic Modules

See paragraph relative to Technical Services for more information.

RMI Ready

WEB Server centralised controllers perform the crucial role of acquiring and monitoring data via the M-Net data transmission bus linking all the components of the VRF-HVRF CITY MULTI, Mr.Slim or Residential system. A router (available as wired ADSL or 3G Mobile versions) creates a secure, protected communication channel with the RMI Server. The modular flexibility of the RMI Server makes it possible to store enormous volumes of data, which is acquired, processed and archived for access from portable devices.

This infrastructural complexity, combined with superior processing, management and security capabilities, is encapsulated in an extremely user friendly concept, to help users optimise the energy usage of their systems.

Unit error log

The unit error log displays a list of the last 64 unit errors for each AE-200/ EW-50, complete with the date and time of detection of the error, the error code and the address of the unit from which the error originated.

BACnet connection

WEB Server centralised controllers may be connected directly to a home automation system using the BACnet® protocol. These units have two ethernet cable ports, for connection respectively to the local LAN network dedicated to the air conditioning system and the LAN network of the the BMS. This makes it possible to integrate the Mitsubishi Electric installation in a home automation system without the addition of a dedicated interface board.