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Related Manuals for Grundfos BACnet for MIXIT
Summary of Contents for Grundfos BACnet for MIXIT
- Page 1 GRUNDFOS INSTRUCTIONS BACnet for MIXIT Functional profile and user manual...
- Page 3 BACnet for MIXIT English (GB) Functional profile and user manual ............4...
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Page 4: Table Of Contents
English (GB) Functional profile and user manual Original functional profile and user manual Table of contents General information ..............5 Notes . -
Page 5: General Information
1.1 Notes The symbols and notes below may appear in Grundfos installation and operating instructions, safety instructions and service instructions. Observe these instructions for explosion-proof products. A blue or grey circle with a white graphical symbol indicates that an action must be taken. -
Page 6: Introduction
• MIXIT BACnet MS/TP • MIXIT Ethernet for BACnet IP Grundfos cannot be held responsible for any problems caused directly or indirectly by using information in the functional profile. 2.2 Definitions and abbreviations APDU Application Protocol Data Unit Address Resolution Protocol. translate IP addresses into MAC addresses. -
Page 7: Specifications For Bacnet Ip
The MIXIT unit can provide address information about their DM-DOB-B objects upon request. ‐ I-Have ● The MIXIT unit can respond to communication control requests. ‐ DeviceCommunicationControl DM-DCC-B It supports both limited and unlimited duration. Password (where ● required) is Grundfos. -
Page 8: Terminal Connections Overview
2.6 Terminal connections overview NC1 NO1 C1 NC2 NO2 C2 NC1 NO1 C1 NC1 NO1 C1 NC1 NO1 C1 NC1 NO1 C1 NC2 NO2 C2 NC2 NO2 C2 NC2 NO2 C2 NC2 NO2 C2 NC1 NO1 C1 NC2 NO2 C2 NC1 NO1 C1 NC2 NO2 C2 Pos. -
Page 9: Bacnet Device Instance Number
2.7.1 Default Device Object Instance Number The Default Device Object Instance Number for the MIXIT unit is 227005. You can change the number via Grundfos GO Remote. 2.7.2 Custom Device Object Instance Number The custom device instance number can be activated using Grundfos GO Remote and change it via AV,0. -
Page 10: Bacnet Ms/Tp Setup
3. BACnet MS/TP Setup 3.1 BACnet bus topology BACnet MS/TP is a multi-master system, meaning that there can be more than one master on the network. It uses a token to control access to the bus network. A master node may initiate the transmission of a data telegram when it holds the token. Both master and slave nodes may transmit data telegrams in response to requests from master nodes, but slaves never hold the token. -
Page 11: Cables For Bacnet Ms/Tp
The MIXIT unit offers two different approaches to setting the BACnet Device Object Instance Number: default and custom. The default BACnet Device Object Instance Number is 227005. The use of custom can be enabled in Grundfos GO Remote and customised via... -
Page 12: Bacnet Ip Setup
1. Turn on MIXIT and connect it to the pump. See separate installation and operating instructions for MIXIT. • If it is the first time MIXIT is connected to Grundfos GO Remote, please run the initial setup wizard 2. Make sure the CONNECT upgrade is installed and select the communication protocol •... -
Page 13: Setting Up Mixit And Communicating Using Bacnet
5. Setting up MIXIT and communicating using BACnet Having successfully completed the setup in the previous sections, it is now possible to start communicating with the MIXIT unit. 5.1 Hello world - starting communication with MIXIT Perform the operations stated in the below table to establish the first initial communication with MIXIT. Object Name Description Value... -
Page 14: Object Overview
Vendor_Name Character string Grundfos Vendor_Identifier Unsigned16 Grundfos product family. This will show Model_Name_Family Character string the Grundfos pump model to which the MIXIT unit is connected to. Model_Name_type GrundfosUnitType Grundfos product type number. Model_Name_version GrundfosUnitVersion Grundfos product version number. Revision number of the BACnet... -
Page 15: Binary Inputs
If 1, the supply flow is above the limit in AV,10 for an extended time (3600 s). The BI,8* Notification Supply Flow High notification is not resettable, but it will reset itself. The supply flow limit function is enabled and disabled with Grundfos GO Remote or BV,0(Heating) or BV,4 (Cooling). 0: Not above 1: Above. -
Page 16: Binary Outputs
6.3 Binary outputs Object name Access Description 0: Local control (default) BO,0 Set Control Source 1: Bus control Set to 1 to enable control via BACnet. See BI,0 for actual state. 0: Stop (Off). 1: Start (ON) If set to 0: BO,1 Set Start Stop •... -
Page 17: Multistate Inputs
1: Heating 2: Cooling MO,4 Config Thermal selection Used for change-over between Heating and Cooling in Combined Heating/Cooling applications.Configuration of Thermal Application Mode must happen via Grundfos GO Remote. 1: General Cooling MO,5 Set Application Type Cooling This sets the application type for Cooling... -
Page 18: Multistate Value
AV,5 BI,13 BI14 BI,15 For all options, the actual temperature setpoint used by the algorithm can be read at AI,2. Configuration of analogue input must happen via Grundfos GO Remote. 6.8 Analog inputs Object name Access Description AI,0 Data Temp Setpoint Remote [°C] Actual value of remote temperature setpoint. -
Page 19: Analog Output
• Set MV,0 (Config Temp Setpoint Source) to 5 6.10 Analog Valve Object name Access Description Value for Custom Device Object Instance Number. Used in conjunction with Grundfos GO setup Config Custom Device AV,0 Object Instance Number Present_Value range: 0-0x3FFFFE.(4194302) Default Present_Value: 0xE7. - Page 20 Object name Access Description Adjusts the slope of the configured heat curve (Min: 0.4, Max: 2). AV,5 Config Heat curve slope (+/-) [-] 1 equals the configured heat curve and 1.5 equals the configured slope multiplied by 1.5. Fall back temperature setpoint in case setpoint signal from bus or sensor is lost. Default: 40 °C (Heating), 15 °C (Cooling).
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Page 21: Mixit Overview
MIXIT can operate in three different thermal application modes as shown in below table – Heating, Cooling and Combined Heating & Cooling. The Thermal Application Mode must be configured via Grundfos GO. In Cooling and when Cooling is the active mode in combined Heating &... - Page 22 Flow Power Diff. T. Return T. Flow Power Diff. T. Return T.
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Page 23: Outdoor Temperature Compensation (Heating)
Outdoor temperature compensation is set by the means of a five-point temperature curve. The five data pairs (T ,) defining the heat curve can only be set in Grundfos GO. The fieldbus provides data points for offsetting (AV,4) and changing the slope flow (AV,5) of the heat curve. -
Page 24: Limiters
The maximum flow temperature can be configured in Grundfos GO. Any temperature setpoint will be limited to a maximum of 5 °C below the configured Max flow temperature to have headroom for controlling the mixing temperature below the limit. The protection function is default enabled with a limit of 50°C when the underfloor heating application is chosen. -
Page 25: Sequence Of Operation And State Machines
The return flow temperature is measured by the sensor in port B of MIXIT. To measure the air temperature, you will need to install a temperature sensor in the coil. The two limits can be configured in Grundfos as well as being enabled or disabled. - Page 26 Radiator heating states Set start Temperature PowerUp Ready Control Shut Down Radiator heating states Heating coil states Set start Ready Preheat PowerUp Frost Shut Down Temperature Control Heating coil states General cooling states Ready PowerUp Shut Down Frost Temperature Control General cooling states 7.8.1 Fallback operation and fault handling The built controller has MIXIT built-in default actions in the case of errors that can’t recovered and fallback modes if sensors are lost.
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Page 27: Energy Monitor
The configuration of two-/ three-way operation can only be made through the hydraulic configuration in GO. Similar, the valve orientation can only be changed on the local HMI or in Grundfos GO. The configuration of these elements are fundamental to the operation of MIXIT and therefore it is important to be present at the product when this configuration is made. -
Page 28: Fault Finding The Product
The gain of the closed-loop controller is too low. 1. Increase the proportional gain with Grundfos GO Remote with 10 % of the actual gain at a time until the response is satisfactory. Wait for several minutes between each increase. -
Page 29: The Mixit Unit Does Not Stop The Pump When A Stop Signal Is Given In Bo,1
Cause Remedy At the pump, local stop has priority over bus control. • Pump error • not paired 8.7 The MIXIT unit does not stop the pump when a stop signal is given in BO,1 Cause Remedy The pump state is incorrect. •... -
Page 30: Bacnet Telegrams
9. BACnet telegrams 9.1 BACnet MS/TP telegram overview All BACnet MS/TP telegrams have the following format: Preamble Telegram type Destination Source Length Header CRC Data Data CRC 2 bytes: Variable [0-501] At most 1 byte 1 byte 1 byte 1 byte 2 bytes, MSB 2 bytes, LSB 1 byte... -
Page 31: Appendix: Overview Of Pump Control Mode Settings
10. Appendix: overview of pump control mode settings 10.1 Setting the duty point for constant-speed control mode This duty point is set via AV,9 (speed duty point). The duty point is a percentage of the maximum speed. In this control mode, the pump speed will be constant at the configured speed duty point. - Page 32 10.3 Setting the duty point for proportional-pressure control mode The duty point is set via AV,7 (head duty point) and AV,8 (flow duty point). The control curve will be a straight sloped line through the configured duty point. Proportional-pressure control curve Pos.
- Page 33 10.4 Setting the duty point for constant-flow control mode The duty point is set via AV,8 (flow duty point). In this control mode, the pump flow will be constant. This control mode is recommended for heating coils. For pumps without a dedicated flow control function, the auxiliary control function flow limit is activated. For hydraulic circuits with a low hydraulic resistance, such as heating coils, this is effectively flow control mode.
- Page 34 Unit 1, Ground floor, Siu Wai industrial Turkey www.ba.grundfos.com Centre GRUNDFOS Pumps NZ Ltd. GRUNDFOS POMPA San. ve Tic. Ltd. Sti. E-mail: grundfos@bih.net.ba 29-33 Wing Hong Street & 68 King Lam 17 Beatrice Tinsley Crescent Gebze Organize Sanayi Bölgesi Street, Cheung Sha Wan...
- Page 35 99258495 12.2023 ECM: 1384027 www.grundfos.com...
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