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Metering – the basic step to optimisation
“If you don’t measure it, you can’t manage it,” for metering, we should add one more statement before it “if you can’t collect it, you can’t measure it,”
Global Control 5
BMS includes metering devices, that
collect information about energy, water and gas usage. Those recordings
are needed for more than just an invoice. As Peter Drucker said, “If
you don’t measure it, you can’t manage it,” for metering, we should add
one more statement before it “if you can’t collect it, you can’t
measure it,” It means that we need all of the information from the
building to measure the usage and then think about optimisations.
You can choose a meter with different communication protocols. Usually, it is M-Bus or Modbus; of course, it depends on the market. But which one to choose when there are two options available?
What are the differences?
5. Predefined facets
M-Bus has predefined types of devices (water meter, etc.) which allows communication drivers to automatically determine the measurement units, without the need to set facets manually. In Modbus, an engineer manually sets up facets.
This is a short list with only a couple of examples of what are the differences between M-Bus and Modbus when it comes to metering. Instead of thinking M-Bus or Modbus meters, the best option is to find a device that allows you to use both of them. A popular option is a Meter Gateway, a device that can work with both protocols and send gathered information from meters to a controller.
One of those solutions is iSMA-B-MG-IP, a meter gateway that can cooperate with M-Bus and Modbus meters. The M-Bus interface allows to communicate and supply power to 60 M-Bus meters (up to 130 mA). The RS485 interface allows to connect up to 128 Modbus devices. Which makes it a perfect fit in many projects.
Written in cooperation with the GC5 Support Team.
If you need more information about iSMA Android Application please contact: firstname.lastname@example.org
or visit our website:
Monika Musielak is a Product Manager in Global Control 5 responsible for HMI panels, iSMA-B-MG-IP and SfAR I/O modules for industrial automation. She made her first steps in electronics world by working as Product Marketing Manager with displays. Now, she is expanding her knowledge in BMS world.
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