Wireless data transmission keeps reliability high and costs low at ...
Wireless data transmission keeps reliability high and costs low at ...
Wireless data transmission keeps reliability high and costs low at ...
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The Grundfos solutionUsing the terrain cabinet <strong>at</strong> the Engvej Øst local pumpingst<strong>at</strong>ion as an example, the robust cabinet includes a meter<strong>and</strong> a sewage pump controller(Dedic<strong>at</strong>ed Controls) with a CIM 250 module which has aGSM/ GPRS modem with its own IP address <strong>and</strong> mobilephone number. The use of a SIM card to establish thewireless connection makes install<strong>at</strong>ion extremely easy,as the GSM/GPRS oper<strong>at</strong>or delivers the communic<strong>at</strong>ioninfrastructure. D<strong>at</strong>a is communic<strong>at</strong>ed wirelessly every10 minutes to the central SCADA system. In an alarmsitu<strong>at</strong>ion, the SCADA system ensures correct alarmh<strong>and</strong>ling. Winpager software – a log program for SCADAon the computer <strong>at</strong> the tre<strong>at</strong>ment plant – sets the schedule,ensuring the alarm is sent to the correct person(s) <strong>at</strong> theright time, according to 5 pre-determined levels of alarmsitu<strong>at</strong>ions <strong>and</strong> response times.The <strong>d<strong>at</strong>a</strong> transmitted includes the main st<strong>at</strong>us of pumppit <strong>and</strong> pumps <strong>and</strong> you can request active alarms <strong>and</strong>warnings. The types of alarms include sewage overf<strong>low</strong>,<strong>low</strong> f<strong>low</strong>, dry running, undervoltage, blocked motor/pump,overtemper<strong>at</strong>ure, klixon, <strong>and</strong> others th<strong>at</strong> can be adaptedaccording to your needs. Currently, there are about 200of these cabinets installed in Denmark with Dedic<strong>at</strong>edControls transmitting wirelessly via the CIM 250 module.The OutcomeThe immedi<strong>at</strong>e benefits of the wireless communic<strong>at</strong>ionoffered by the CIM 250 arise from the system showing howa pumping st<strong>at</strong>ion is running over an entire day. This helpssave time <strong>and</strong> money by reducing the need for manualinspections <strong>and</strong> helping make better planning possible. Intime, this means gre<strong>at</strong>er <strong>reliability</strong> from better preventivemaintenance. Time is saved with alarms. Personnel onlyget called out if absolutely necessary <strong>and</strong> they canact earlier. In addition, the wireless system providesoper<strong>at</strong>ional <strong>d<strong>at</strong>a</strong> for control <strong>and</strong> st<strong>at</strong>istics. This increasesthe possibility for even gre<strong>at</strong>er measures for ensuringmaintenance planning, oper<strong>at</strong>ional <strong>reliability</strong>, <strong>and</strong> also foroptimising efficiency in the future, because all <strong>d<strong>at</strong>a</strong> is savedin a <strong>d<strong>at</strong>a</strong>base.• SEG sewage grindersAbout the CIM 250 moduleThe CIM 250 is a st<strong>and</strong>ard interface modulefor remote wireless <strong>d<strong>at</strong>a</strong> <strong>transmission</strong> viaa GSM/GPRS network. The GSM/GPRSmodule can work as a SCADA Interfaceenabling a SCADA system or another PLCcontroller to establish a remote connectioneither via GSM Call-up using the ModbusRTU protocol or via a GPRS connectionusing the Modbus TCP protocol with thesystem.The interface module is installed as aninternal add-on for Dedic<strong>at</strong>ed Controls. Inaddition to CIM 250 GSM/GPRS, interfacemodules for Dedic<strong>at</strong>ed Controls are alsoavailable for the GENIbus <strong>and</strong> Modbus RTUfieldbus using a wired RS485 connection.About Bjerringbro Wastew<strong>at</strong>er Tre<strong>at</strong>mentPlantBjerringbro is loc<strong>at</strong>ed in mid-Jutl<strong>and</strong>,Denmark. The Bjerringbro Wastew<strong>at</strong>erTre<strong>at</strong>ment Plant is one of 22 wastew<strong>at</strong>ertre<strong>at</strong>ment plants serving 250 pumpingst<strong>at</strong>ions oper<strong>at</strong>ed by Energi Viborg. Of these,11 wastew<strong>at</strong>er tre<strong>at</strong>ment plants are in theViborg Øst area, which includes Bjerringbro.Bjerringbro Wastew<strong>at</strong>er Tre<strong>at</strong>ment Planthas 35 pumping st<strong>at</strong>ions, 4 of which runGrundfos pumps transmitting <strong>d<strong>at</strong>a</strong> wirelessvia CIM 250.Quote:“The wireless control unit with Dedic<strong>at</strong>ed Controls savesus time <strong>and</strong> removes the need for routine visits to ourmany pumping st<strong>at</strong>ions,” says Kaj Lorenzen, Driftsleder,Bjerringbro Renseanlæg. “<strong>Wireless</strong> <strong>transmission</strong> meanswe get <strong>d<strong>at</strong>a</strong> here <strong>and</strong> now – <strong>and</strong> th<strong>at</strong>’s <strong>d<strong>at</strong>a</strong> we can use.”
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