Samson 5476 manual Activating the meter bus, Flow rate and/or capacity limitation via meter bus

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Communication

Note!

A 15 V DC supply voltage (+15 V at terminal 15 connected to the meter bus connection terminal

3)can be used at the WMZ connection of TROVIS 5476 Controller when the red jumper on the back of the controller is located pointing towards the edge of the controller (Fig. 8). Otherwise, the meter bus module in the heat meter is supplied. Furthermore, the heat meter is galvanically connected with controller input side (pulse and current input at terminal 15) resulting it being connected to the Modbus interface as well which can lead to the communication coming to a standstill.

9.4.1 Activating the meter bus

To successfully transfer data from the heat meter to the controller, the heat meter must use a standardized protocol in accordance with EN 1434-3. It is not possible to make a general state- ment about which specific data can be accessed in each meter. For details on the different meter makes, refer to the technical documentation TV-SK 6311. All necessary function block parame- ters to set up the communication with heat or water meters are available in function block FB 29. The meter bus address, the model code and the reading mode must be specified for the heat meters WMZ1 to WMZ3.

A meter bus address must be unique and correspond with the address preset in the WMZ. If the preset meter bus address is unknown, a single heat meter connected to the controller can be as- signed the meter bus address 254. The address 255 deactivates the communication with the re- spective WMZ. The model code to be set for the heat meter can be found in TV-SK 6311. In gen- eral, the default setting of 1434 can be used for most devices. The meters can be read either au- tomatically every 24 hours (approx.), continuously or when the coils (= Modbus data points) as- signed to the heat meters WMZ1 to WMZ3 are overwritten with the value 1 via the system bus interface.

Function

WE

Configuration

Meter bus

OFF

FB29 = ON

 

254*

Meter bus address for WMZ 1 to 3 (ST.-NO) / 0 to 255

 

1434

Model code WMZ 1 to 3 / 1434, CAL3, APAtO, SLS

 

Cont

Reading mode WMZ 1 to 3 / 24h, Cont, CoiL

* WE for WMZ 2 and 3: 255

9.4.2 Flow rate and/or capacity limitation via meter bus

Similar to the flow rate limitation based on a standardized 0/4 to 20 mA signal, the update rate of the measured variable, flow rate and/or capacity, must be smaller than 5 seconds in meter bus operation to carry out a proper limitation. Refer to the technical documentation TV-SK 6311

EB 5476 EN 71

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Contents Mounting and Operating Instructions EB 5476 EN Disclaimer of liability Contents Contents Contents Operating keys OperationOperating elements Operating switches Operating modes Closed DisplayDisplaying data Setting the controller time Heating circuit Setting the times-of-useStart Entering public holidays Entering vacation periods Correcting temperature set points Activating and deactivating functions Start-up Setting the system code numberDisplay shows Current system code number Blink Enter key number Changing parametersCalibrating sensors Resetting to default values Manual operation DHW SystemsSystem Anl Default settings FB13 = OFF Without RF FB20 = on 26 EB 5476 EN FB15 = ON, select CF FB15 = ON, select Solar FB21 = OFF Solar collector 32 EB 5476 EN FB15 = ON, select CF 34 EB 5476 EN Default settings FB13 = OFF Without RF FB20 = on FB15 = on Systems 38 EB 5476 EN FB15 = on Weather-compensated control Functions of the heating circuitGradient characteristic · 4-point characteristic 2 4-point characteristicUnderfloor heating Fixed set point controlOT deactivation value in reduced operation Summer modeRemote operation Delayed outdoor temperature adaptationOptimization Adaptation Flash adaptationPotentiometer input Pump management· DHW heating in a storage tank system Functions of the DHW circuit · DHW heating in a storage tank charging system DHW heating in the storage tank charging system52 EB 5476 EN DHW heating in instantaneous heating system Anl DHW heating with solar system Anl 2, 3, 4, 5 undParallel pump operation Anl 2, 3 Circulation pump operation during storage tank chargingCirculation over the heat exchanger Intermediate heating operation Anl 2, 3Set-back operation Priority circuit Anl 4, 5, 6, 7, 8Reverse control Thermal disinfection of the DHW storage tank Forced charging of the DHW storage tank Anl 2, 3, 5, 7, 8Forced operation of the pumps Return flow temperature limitationFrost protection FB21 = on Three-step control Condensate accumulation controlProcessing of external demand in RK1 On/off controlReleasing a control circuit over the binary input Flow rate/capacity limitation Limitation using pulse inputLocking manual levels Limitation using 0/4 to 20 mA signalSetting a customized key number Sensor failure Operational faultsCollective error alarm Error status register Temperature monitoringCommunication CommunicationController with RS-232-C port · Pin assignment of RS-232 port left and RS-485 port right Controller with serial RS-485 interfaceDescription of communication parameters to be adjusted Modem time-out t0 Meter bus interfaceFlow rate and/or capacity limitation via meter bus Activating the meter busInstallation Appendix Memory module InstallationPanel mounting Electrical connection TWF Systems Anl 1 to Systems Anl 5 to 80 EB 5476 EN Appendix Function block list Parallel pump Setting only possible after entering key number UP1 Circulation over BA8 12.2 Parameter list 88 EB 5476 EN Maximum flow temperature Can only be set after entering the key number Min. return flow temperature System Anl 9, underfloor heating circuit Min. flow temperature 20 to 130 C 20 C DHW heating DHW heating OFF 20 to 90 C 50 C 20 to 130 C 120 C ST.-NR Sensor resistance tables Technical data Customer data Model code WMZ 2 FB29 = on Parameter settings Appendix Public holidays and vacations SLP Key number 1732 Appendix Index PTC Thermal disinfection EB 5476 EN 0000 Page EB 5476 EN

5476 specifications

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