Danfoss ECL Comfort 310 Operating Manual

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Danfoss ECL Comfort 310 Operating Manual Manual pdf 156 page image

7.3 Several controllers in the same systemWhen ECL Comfort controllers are interconnected by means ofthe ECL 485 communication bus (cable type: 2 x twisted pair), themaster controller will broadcast the following signals to the slavecontrollers:• Outdoor temperature (measured by S1)• Time and date• DHW tank heating / charging activityFurthermore, the master controller can receive information about:• the desired flow temperature (demand) from slave controllers• and (as from ECL controller version 1.48) DHW tank heating /charging activity in slave controllersSituation 1:SLAVE controllers: How to make use of the outdoortemperature signal sent from the MASTER controllerThe slave controllers only receive information about outdoortemperature and date / time.SLAVE controllers:Change the factory set address from 15 to address 0.• In , go to System > Communication > ECL 485 addr.ECL 485 addr. (master / slave address) 2048Circuit Setting range Choose0 ... 15 0ECL 485 bus cableMaximum recommended length of the ECL 485 bus is calculated likethis:Subtract "Total length of all input cables of all ECL controllers in themaster - slave system" from 200 m.Simple example for total length of all input cables, 3 x ECL:1 x ECL Outdoor temp. sensor: 15 m3 x ECL Flow temp. sensor: 18 m3 x ECL Return temp. sensor: 18 m3 x ECL Room temp. sensor: 30 mTotal: 81 mMaximum recommended length of the ECL 485 bus:200 - 81 m = 119 mIn a system with MASTER / SLAVE controllers, only one MASTERcontroller with address 15 is allowed.If by mistake more MASTER controllers are present in an ECL 485communication bus system, decide which controller is to be MASTER.Change the address in the remaining controllers. However, the systemwill operate but not be stable with more than one MASTER controller.In the MASTER controller, the address in ‘ECL 485 addr. (master / slaveaddress)’, ID no. 2048, must always be 15.Navigation:• In , go to System > Communication > ECL 485 addr.SLAVE controllers must be set to another address than 15:Navigation:• In , go to System > Communication > ECL 485 addr.'Demand offset' with a value is to be used in the Master controller only.156 | © Danfoss | 2017.09 VI.GU.T2.02Operating Guide ECL Comfort 310, application A333