Table of Contents
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Table of Contents
Summary of Contents for Rickard MCU 2
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Page 1: Mlm Integration With Bms
MLM INTEGRATION WITH BMS MLM INTERGRATION WITH BMS ISSUE 4 RICKARD 2019... -
Page 2: Table Of Contents
Channel and Zone designations ....................................Identifying, mapping and binding of network variables to other network protocols ....MCU to Lon Mapping ..........................................Discovering the MCU 2 with Lon ………………………………………………………………………………………………………………………………………. MCU 2 BACnet to BMS setup ………………………………………………………………………………………………………………………………………………. Bacnet/IP setup ………………………………………………………………………………………………………………………………………………………………………………. BACnet ms/tp setup ……………………………………………………………………………………………………………………………………………………………………. -
Page 3: Mcu 2 Gateway Overview
BacNet/IP – Magnetic Ethernet BacNet ms/tp – RS485 bus Lontalk - TP/FT-10 bus The following MCU 2 hardware models are available: MCU 2 model Part No Mlm Tool User Hardware Interface BMS Protocol Standard BW2011‐2T Magne c Ethernet or USB B standard... -
Page 4: Input To Bms
One diffuser in such a zone will be designated a ‘master’ diffuser and will ‘host’ the space temperature measure- ment and setpoint facility. Other diffusers in the same control zone will be designated ‘slave’ or ‘drone’ diffusers and will follow the ‘master’ control outputs. RICKARD 2019... -
Page 5: Channel And Zone Designations
The 3 zone numbers marked in bold in the table below corresponds to the physical connection to channel 1 (Zone 1) and channel 2 (Zones 16, 17 & 18) as depicted in the logical diffuser layout (below) in the MLM Tool. Channel 1 Channel 2 Channel 3 Channel 4 RICKARD 2019... -
Page 6: Identifying, Mapping And Binding Of Network Variables To Other Network Protocols
MCU to Lon Mapping To connect with the MLM Tool to a Lon configured MCU, the USB type B hardware port on the MCU 2 is used. Either ‘Basic View’ or ‘Project View’ can be selected in the MLM Tool application. -
Page 7: Discovering The Mcu 2 With Lon
If not, the .xif program revision files 3 (standard command set) and 4 (extended command set) is available on the Rickard Trac download site http://trac.lhar.co.za/ Pressing the service button will broadcast the Neuron ID and the program ID to the BMS system. - Page 8 The table below shows the basic functional profile supported for each control zone: Note: More manufacturer defined network variables are available on request. The same functional block as depicted in Lonmaker. Note the nvoHeatPrimary variable is not activated in the basic functional profile. RICKARD 2019...
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Page 9: Mcu 2 Bacnet To Bms Setup
Bacnet/IP setup To configure a MCU 2 into a BACnet/IP network, connect to the MCU web page by entering the MCU 2 IP ad- dress into an Internet browser. The default IP address is 192.168.0.251. The following information will be dis- played on the web page: The Serial number and Software Version number - cannot be changed. -
Page 10: Bacnet Ms/Tp Setup
Once the diffuser network has been set up with the MLM Tool, it is recommended that the same Master List as described in the MCU to Lon mapping section, now be extracted to map the diffuser network to BMS. RICKARD 2019... -
Page 11: Mcu Bacnet Point Mapping
Segmentation is not supported. The maximum APDU size is 480 bytes. A typical MCU Device Object with device properties is indicated on a BMS front-end below, in this case Work- place AX running on a Niagara platform: RICKARD 2019... - Page 12 ID is editable on the main page. The IP address can be changed in the ‘Configure LAN interface’. BACnet port address and deg °C/°F selection is updated on this page by entering and then pressing the ‘Save’ button. RICKARD 2019...
- Page 13 Note these parameters are applied to all the control zones available on the MCU. To confirm live BACnet data, a MCU BACnet (client) reader can be downloaded from the Rickard Trac download site http://trac.lhar.co.za/ . Enter either the MCU IP address or BACnet ID for the device to be discovered. Note the BACnet reader display all data points in sequence, whether that point contains data or not.
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Page 14: Diffuser Mode (Status) - Multi-State Input 0-59
BMS front end. The string value can be read at the state_text_property for the specific point. Decimal Mode Descrip on Value System Idle (in control temperature band) Ini alizing Hea ng mode Cooling mode Actuator in manual operate mode BMS control override mode RICKARD 2019... -
Page 15: Occupancy Mode (Status) - Multi-State Input 60-119
Drive diffuser to supply air max heat posi on and switch heater max on Occupancy override - multi-state output 60-119 The following table contains occupancy override functions as set by the BMS. Decimal Mode Descrip on Value Occupancy normal (no override from BMS) Override unoccupied Override occupied RICKARD 2019... - Page 16 The following picture shows a typical MCU mapped on a BMS front-end, herewith Workplace AX running on a Niagara platform showing data for Zone 1. Please note the Read Only fields indicated in the Write (right hand) column. RICKARD 2019...
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Page 17: Mlm Control Override Handling Procedure
(On-Board) click on Process/BMS command and select the action required during control override. Press Write. See the BMS Command table below. Note these flags also double as status indicators should an external BMS command be active, e.g. a BACnet BMS command received via the MCU. RICKARD 2019... -
Page 18: Rtc Control Override Activation
Expand the Backoff BMS Cmd tab. The BMS command selects the control override action required for af- terhours back-off. The final step is to expand the Process/Master Command tab and check (and Write) the control override box. Activating this box will enable either an external BMS command or internal control override. RICKARD 2019... -
Page 19: Rtc Control Override Operation
The number of sensors mounted per control zone is determined by the detection area, and ranges from one per control zone to one per diffuser and Wallstat units. The sensor signals are combined in an ‘or’ function, which means that detection picked up by any sensor in a control zone will flag that zone as occupied. RICKARD 2019... -
Page 20: Occupancy Control Override Operation
A Wallstat unit containing an occupancy sensor does not require an occupancy present setup and is always enabled for that zone. The sensor sensitivity can be changed for a value between 1 and 10 to offset false or no triggers. The default setting ranges between 6 and 8. RICKARD 2019... - Page 21 Unoccupied delays – setting these timers to zero will stop the timers and the controller unit (Wallstat or On-board) will always indicate the zone as occupied. Control override – by unchecking this box, the controller unit will still show the occupied status, but will not command the Diffuser controllers into a back-off state. RICKARD 2019...
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Page 22: Mlm Tool Occupancy Wizard
0% position. This position will be maintained until either: Occupancy is detected and control reverts to normal or.. The room temperature drifts outside the Backoff band setting with the control disk then moving back to the 30% position. RICKARD 2019... -
Page 23: Occupancy Override
If Delay 1 is selected, the relay contact for Switch A or Switch B will open when Delay 1 expires. This contact will remain open until the status changes from unoccupied to occupy again. The same operation goes for Delay 2. The user has the option to select both Switch channels to operate off the same timer. RICKARD 2019... -
Page 24: Airflow Sense Setup And Operation
nodes. Check the release notes on the Trac download site http://trac.lhar.co.za/ . Ensure that firmware revision 6.08 or higher is loaded onto the MCU 2 unit. Ensure the MCU Flow coefficient file is up to date (File/Update MCU Flow Coefficients). - Page 25 Note if more than one, but not all diffusers in a zone are fitted with airflow sen- sors, the distribute function for the zone will only work off one pressure sensor. No constants found – update the MCU Flow coefficients or check the diffuser type. RICKARD 2019...
- Page 26 Wallstat. For this zone (17) only the master controller was fitted with an airflow sensor, hence the distribute function was selected. The zone consists of three equal size diffusers. For a BACnet BMS system this total flow value is found in BACnet point variables AI: 60...119. RICKARD 2019...
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