Interfacing UPS Systems to a BACnet Network

Interfacing UPS Systems to a BACnet Network

Monitoring the UPS alarms from BACnet presents challenges that are not compatible with traditional gateways. BACnet stands for Building Automation and Control Networks. It is a communication protocol standard designed specifically to provide a way to integrate building control products made by different manufacturers.

To interface a UPS system with a BACnet network, you typically need a dedicated "BACnet gateway" or a network card within the UPS that can translate the UPS data (often communicated via SNMP) into BACnet objects, allowing the UPS status and parameters to be monitored and controlled by a Building Management System (BMS) on the BACnet network; essentially acting as a protocol converter between the UPS's native language and the BACnet protocol.

Data centers monitor all of their equipment using SNMP, which stands for Simple Network Management Protocol. This protocol is intended for managing networks and network equipment. Therefore, data centers will monitor everything from servers, routers, and switches to UPS systems and transfer switches using SNMP. 

The old way of doing things had the IT people monitoring the IT related equipment with their own network while the building management people had their own network to monitor HVAC and building related things (if they had any network at all). The line in the sand between these two monitoring networks is rapidly washing away. Building management wants more information from the IT side, especially when it comes to backup power systems. Network management wants to know more from the building side, especially when it relates to HVAC and keeping network equipment running cool.

What is a UPS?

A UPS is a battery-powered device you can plug into your building's electrical system to provide a backup source of power. It does this by continuously monitoring the available electricity and routing it around any problems, such as brownouts or blackouts.

Key points about interfacing UPS systems with BACnet: -

·        Gateway Device:

A dedicated gateway is usually required to bridge the communication between the UPS (often using SNMP) and the BACnet network, mapping SNMP variables to appropriate BACnet objects. 

·        Data Translation:

The gateway translates UPS data like voltage, current, battery status, alarms, etc., into standardized BACnet objects that can be readily understood by the BMS. 

·        Network Card Option:

Some UPS models may offer built-in BACnet network cards that directly enable communication on the BACnet network without an external gateway. 

·        Monitoring and Control:

Once integrated, a BMS can monitor various UPS parameters like power status, battery level, alarms, and even initiate actions like graceful shutdown in case of power failure.

·        Controller with BACnet support:

The Distech controller you use needs to be equipped with a BACnet module or functionality to communicate with other BACnet devices on the network. 

·        Wiring connection:

Connect the UPS to the controller using the appropriate wiring based on the UPS model and controller input specifications. 

·        Configuration within controller:

Access the controller's programming interface and navigate to the BACnet settings to add the UPS as a device, defining its parameters like voltage, current, battery status, etc. 

·        Data points and object types:

Within the BACnet network, the UPS will be represented by specific data points (like "battery level", "power factor") which can be accessed by the BMS system for monitoring and control. 

Benefits of integrating UPS with BACnet:

·        Centralized Monitoring: Access all UPS information within the BMS alongside other building systems like HVAC, lighting, and security. 

·        Automated Response: Trigger alarms and take corrective actions based on UPS status changes. 

·        Improved Efficiency: Monitor power consumption and identify potential power issues proactively. 

Considerations when integrating UPS with BACnet:

·        UPS Compatibility:

Check if your UPS model supports BACnet communication, either natively or through a compatible network card. 

·        Gateway Selection:

Choose a gateway that supports the specific UPS communication protocol (like SNMP) and can accurately map data to BACnet objects. 

·        Object Mapping:

Properly configure the mapping between UPS data points and BACnet objects to ensure accurate data interpretation by the BMS

How to access the UPS data on BACnet:

·        Access the controller interface: Use the Distech controller's web interface or dedicated software to access the BACnet network.

·        Browse devices: Navigate to the BACnet device list to view the connected UPS.

·        View data points: Select the UPS device to access its individual data points, allowing you to monitor parameters like battery level, power consumption, and fault status. 

How it works:

1. Data collection:

The UPS collects information about its operational status, including battery level, input voltage, and alarm conditions.

2. BACnet translation:

The UPS gateway or module converts this data into BACnet objects, which are standardized data structures recognized by the BMS.

3. Network communication:

The BACnet objects are transmitted over the network to the BMS server using the BACnet protocol.

4. Data presentation:

The BMS software displays the UPS data on the user interface, allowing monitoring and control actions based on the received information.

BACNET interface allows UPS models of the MASTERYS, MODULYS GP 2.0 and DELPHYS families to be connected to a BACNET network for BMS management.

NetMan 208 is a network communications card that enables Riello UPS systems to easily integrate into medium or large networks, providing a high level of reliability in communication between the UPS and associated management systems. 

The Babel Buster 3 creates a BACnet interface for UPS systems by converting SNMP to BACnet. The Babel Buster 3 acts as a protocol translator, converting variables found in the SNMP MIB to BACnet objects. You may then use BACnet to monitor the UPS from your Building Management System.

To connect a Distech BMS UPS to a BACnet network, you would need to use a Distech controller with BACnet capabilities, connect the UPS to the controller via the appropriate wiring, and then configure the controller to recognize and communicate with the UPS using BACnet protocol, allowing you to monitor and control the UPS status within your building automation system.

APC single phase UPS (SMT, SMX, SMTL, SRTL, SURT, SURTD) units global offer with APC Network Management Cards which is BACnet capable. 

Schneider Electric's EcoStruxure Building Operation Workstation is a powerful tool that allows seamless integration and control of BACnet devices. This article will guide you through the setup process, enabling efficient management of HVAC, lighting, and other building automation systems using the BACnet protocol within the Schneider Workstation environment.

 

Requirements

Before starting the setup process, ensure you have the following:

1.   Hardware Requirements:

·        Schneider Electric Workstation: Ensure you have access to an EcoStruxure Building Operation Workstation.

·        BACnet Devices: Devices such as sensors, actuators, and controllers that support the BACnet protocol.

·        Networking Equipment: Ethernet cables, switches, and routers to connect devices within the network

2.   Software Requirements:

·        EcoStruxure Building Operation Software: The software must be installed on your computer.

·        Licenses: Ensure you have the appropriate BACnet integration licenses from Schneider Electric.

·        Drivers and Plugins: Install necessary BACnet drivers/plugins compatible with your version of EcoStruxure.

3.   Network Requirements:

·        IP Network Setup: A stable IP network where all BACnet devices are connected.

·        Unique Device Identifiers: Assign unique instance numbers to each BACnet device to avoid conflicts.

 

Installation

The initial step involves installing the EcoStruxure Building Operation Workstation software and ensuring all components are in place:

1.   Download and Install Software:

·        Obtain the EcoStruxure Building Operation software from Schneider Electric's official website.

·        Follow the installation wizard to install the software on your computer.

·        Activate the software with the license keys provided by Schneider Electric.

2.   Set Up Networking Equipment:

·        Connect all BACnet devices to your network using Ethernet cables.

·        Ensure the network is configured to allow communication between devices

 

Configuration

Now, let's proceed with configuring the BACnet protocol in the Schneider Workstation:

Step 1: Add a BACnet Network

1.   Open the EcoStruxure Workstation:

·        Launch the EcoStruxure Building Operation Workstation on your computer.

·        Log in using your credentials.

2.   Navigate to the System Tree:

·        In the Workstation interface, find the System Tree panel on the left side.

·        Right-click on the System Tree and select Add BACnet Network from the context menu.

3.   Configure BACnet Network Settings:

·        Enter the necessary information, such as Network Number and Device Instance Range.

·        Select the appropriate BACnet driver from the list, e.g., BACnet/IP.

·        Click OK to save the network settings.

4.   Set Network Properties:

·        Right-click the newly added BACnet Network and select Properties.

·        Configure network-specific settings, such as Device Timeout, Retry Count, and APDU Timeout.

 

Step 2: Discover BACnet Devices

1.   Initiate Device Discovery:

·        Right-click on the BACnet Network in the System Tree and select Discover Devices.

·        The Workstation will scan the network for BACnet-compatible devices.

2.   Select and Add Devices:

·        Review the discovered devices list and select the devices you want to add to your system.

·        Click Add Selected Devices to integrate them into your EcoStruxure Workstation.

3.   Configure Device Properties:

·        Once added, configure each device's properties, such as Device Name, Device Instance, and Location.

·        Adjust any additional settings based on your building automation requirements.

Step 3: Set Up BACnet Points

1.   Define BACnet Points:

·        Expand the BACnet device in the System Tree to view available BACnet objects (points).

·        Right-click on a point and select Add to integrate it into your system.

2.   Configure Point Settings:

·        Set up parameters such as Point Type (e.g., Analog Input, Binary Output), Units, and Description.

·        Define properties like Priority Array and Commandable as needed.

3.   Create Graphics and Alarms:

·        Use the Workstation's graphics editor to create intuitive visual representations of your BACnet points.

·        Set up alarms and notifications for critical events using the Alarm Configuration tool.

Testing

After configuration, it's essential to test the setup to ensure everything functions correctly:

1.   Verify Device Communication:

·        Use the Workstation's Status Viewer to check the communication status of all BACnet devices.

·        Confirm that devices are online and responding to commands.

2.   Test Control Commands:

·        Send control commands to BACnet devices (e.g., turning on/off lights, adjusting HVAC settings).

·        Observe real-time feedback and ensure devices respond accurately.

3.   Monitor Data Points:

·        Monitor live data from BACnet points within the Workstation.

·        Ensure accurate readings for temperature, humidity, occupancy, and other metrics.

Troubleshooting

Encountering issues is common during the setup process. Here are some troubleshooting tips:

1.   Device Not Discovered:

·        Check network connectivity and ensure devices are powered on.

·        Verify that IP addresses and instance numbers are correctly configured.

2.   Communication Timeout:

·        Adjust APDU Timeout and Retry Count settings in network properties.

·        Ensure no network congestion or interference is causing delays.

3.   Incorrect Data Readings:

·        Double-check BACnet point configuration for accuracy.

·        Verify that sensors and devices are calibrated correctly.