SOLUTIONS - Moeller Electric Parts

SOLUTIONS18The multi-function display is used to startautomated dosing and display the available volumeof purified water.function display was therefore chosen forthe visualization of the filling stations. Itcomes standard with a special polyesterfoil which is highly resistant to solvents.The rugged MFD4 (protection class IP65)is provided with an absolutely flat, fullgraphics 5.7 inch TFT display with 32,000colours and resistive touch technology. Thedevice, with a bevelled front frame andsmall mounting depth, is also suitable foruse in dust environments in accordance withthe ATEX Directive 94 / 9 / EC Zone 22 Cat3D and is also approved for use on ships.The Windows CE-based MFD4 comes asstandard with an integrated 64 MB SRAM,4 MB Flash for data / program memory,6 MB for the visualization and a batterybackedreal-time clock. Users can utilisethe integrated PLC functionality or usethe standard CANopen/easyNet, Ethernetand RS232 interfaces for data exchangewith different controllers. The devices alsocome standard with a slot for an onboardMMC card. Only the easySoft-CoDeSys (IEC61131-3) software is required for the boththe visualization and the PLC application.This provides the programmer with all thefunctions for creating screens, password andalarm management or trend and bargraphdisplay. The web server provided onboardallows created screens to be accessed viathe Internet or an Intranet.Intuitive operating conceptAcmos had already created a user-friendlyoperating concept for its filling stations,thus allowing intuitive operation. Thisincludes graphic elements such as bargraphdisplays for filling levels and filling progress,as well as meters for flow speed, colourbasedstatus changes and function settingssuch as supply measurements or pressureboosting, and last but not least warningmessages. Setpoints are entered via atemporary numerical keypad. In addition tothe actual filling operation, general screensare provided such as the deactivationfunction for cleaning the display, the systemparameters or password protection menu.Intelligent I / OThe Elga Berkefeld implementation used aneasy800 which is connected to the MFD4 viathe CANopen / easyNet interface and whichallows the connection of digital and analoginputs and outputs. The programmableeasy800 processes the signals in advancethanks to the easySoft software and itswide range of function blocks integratedin the device. For example, the high-speedcounter function block can calculate thewater volume from the pulses received fromthe flow meter, and the frequency counterfunction block can calculate the flow speedin liter per minute from the same pulses.The level in the supply tank is output as ananalog value via a pressure transmitter andscaled to a liter value using the value scalingfunction block. This therefore allows theMFD4 to receive absolute actual values fromthe easyRelay and use the released CPUresources for other tasks.CONCLUSIONPUMPSTATIONINTERMEDIATETANK STORAGEWATERTREATMENTHartmut Sonder, project manager atElga Berkefeld, explained as follows:“Moeller‘s MFD4 allows us to provideoutstanding solutions to all ourcustomer requirements. The opencommunication interfaces enablehardware and software to be usedanywhere, and the system offers anoutstanding price/performance ratio.We chose easy800 for intelligent I/Oprocessing since the devices of the easyfamily have been serving our customersreliably for years.”DOSINGSTATIONDOSINGSTATIONDOSINGSTATIONDOSINGSTATIONDOSINGSTATIONQuicklink ID:MS1815For Moeller Electric Sales and Support call KMparts.com (866) 595-961621