Wallace D. Wattles said, “It is essential to have good tools, but it is also essential that the tools should be used in the right way.” Electricity rates are skyrocketing, and demand increases as our society sets out to recover from COVID. It’s more important than ever to ensure your power is reliable and efficient. Having the right tools to monitor your electrical system is a key factor in your success. Understanding tools such as Power Monitoring Systems (PMS) and Building Management Systems (BMS) is the first step. So, let’s break it down.
PMS and BMS play distinct roles within full-scale facilities. A Power Monitoring System monitors the electrical distribution grid, alerts to power quality problems, and logs power data/events up to the millisecond over time. Meanwhile, Building Management Systems monitor critical loads within facilities such as HVAC, lighting, fire systems, security systems, and even power systems (on a less granular level).
A BMS System can poll the same meters/equipment as PMS. However, a BMS performs this function slower and doesn’t collect data related to power quality. In most cases, you will want to avoid a two-master polling scenario, as the vast majority of devices are not capable of handling two masters simultaneously. In short, a two-master polling scenario is a sure-fire way of guaranteeing communication problems.
Therefore, it’s most efficient for the power monitoring system to poll the electrical distribution and metering systems. Then, it can pass the information to the building management system for a cleaner design. The power monitoring systems contractor must coordinate closely with the building systems management contractor to successfully complete this process.
APT has successfully implemented PMS to BMS integrations across the Western United States. So, we put together our list of 10 steps to Integration Success.
To integrate a BMS, you must first understand and coordinate your network hardware.
So here are some questions to consider:
Another critical factor in ensuring successful integration is understanding and coordinating protocol. For instance, standard PMS systems typically communicate via MODBUS. Meanwhile, standard BMS systems typically communicate via BACnet.
So, remember to consider the following:
Determine which devices currently communicating with the PMS need to report data to the BMS system.
Important information includes:
Upon defining your device list, you must identify the points per device type. How will the points be pulled from the device-specific points map? Once you define the points list for device type, simple integration replication can occur each time the same “device type” is encountered on the device list.
Defining the communication frequency up-front will help integrators create the appropriate logic for communication on both systems. In addition, it will help avoid costly system updates and or punch-list items at the end of the project.
Make sure to determine:
How often does the BMS need updated data per point type per device?
Once the two systems successfully communicate, you need to create a test plan. A logical and exhaustive test plan provides confidence that the BMS system receives all planned data on the proper communication schedule. Integration test plans must ensure the test plan successfully logs each device and point in the BMS system.
To monitor information, it’s only logical that you need to establish a plan to do so. However, in reality, this is not always the case. Therefore, setting up a clearly defined monitoring plan is crucial for successful integration.
Here are a few items to consider:
In the event of a data transfer interruption, how will your system generate alerts?
How will the system distribute alerts?
As a result of this extra step, the PMS can recognize more quickly when it loses connection to a vital device that sends information to the BMS.
How often will you review and service your system? To answer this, you need to outline a maintenance plan. It will ensure that the systems maintain proper functionality in the event of changes to the physical system, software, or cybersecurity.
But, what happens if all else fails and the systems stop communicating? Are you prepared for a complete outage on one or multiple systems? Unfortunately, our world today is one in which nothing is certain. Therefore we must prepare for every scenario that may arise.
APT specializes in fully-fledged power monitoring system design, implementation, and service. As part of design and execution, we also include planning and implementation for integration into BMS systems. In short, APT speaks your Information Technology team’s language. This language defines the server and software resources required for the power monitoring application. Above all, we help you focus on the information you need to run your business.
Contact an APT professional today and let us help find the best solution to fit your facility’s needs.
Ken Shaffer | APT Engineering Operations Manager
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