Modbus as a meter communication protocol
Many power meters designed for use in commercial and industrial facilities can provide their data to other devices using the Modbus protocol. Data items that are commonly available via Modbus include power (or demand), energy, voltage, current, and power factor. Many other commodity meters also use Modbus.
Modbus has been widely used because it is a popular, open protocol that is easy to implement. Modbus comes in the RS-485 Modbus RTU variety and in the Modbus TCP variety; most older devices only support Modbus RTU. One typically uses a Modbus router to make data from Modbus RTU devices accessible on a TCP/IP network - a router like our Cimetrics B2000.
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