Oztek Blog

Using Modbus to Communicate with Multiple OZpcs-RS40s

Posted by Dave Zendzian on Mar 3, 2021 8:43:13 AM

The OZpcs-RS40 is a 40kW Power Conversion System (PCS) intended for battery-based energy storage applications. The PCS is designed to be mounted in a standard 19” rack, and easily paralleled to scale power capability. All hardware interfaces are located on the front panel, utilizing pass-through type terminal blocks for simple daisy chained cable or bus bar power connections. Similarly, the Modbus and digital I/O signals are provided on redundant, high density, 15-pin D-Sub connectors, which also allow for simple daisy chain cabling. When using Modbus to control multiple, paralleled PCS there are several things to consider, including termination, addressing, and broadcast messaging.

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Topics: Grid Tie Inverter, Digital Power Control, energy storage, MODBUS, Smart Inverter, UL1741-SA

What is MESA/SunSpec?

Posted by Dave Zendzian on Mar 31, 2017 1:26:20 PM

Traditionally, grid energy storage systems (ESS) have been one-off solutions, utilizing proprietary software and hardware components.  As such, each installation requires time consuming, custom integration.  Often times proprietary vendor hardware or software protocols require "hacks" to get all components to play nice.  Ultimately this approach results in higher costs, decreased reliability, and limited scalability and upgrade options.

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Topics: Grid Tie Inverter, power inverter, Power Conversion, energy storage, MODBUS

MODBUS SCR Controller

Posted by Dave Zendzian on May 23, 2011 1:49:00 PM

Conventional SCR controllers typically use simple analog and discrete digital signals to control and supervise operation of the product, whether it be an SCR controller for heaters, an SCR controlled rectifier, or an SCR motor control.  However, as customers expect more and more out of our products, this simple user interface limits our ability to provide value add in the products we design.

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Topics: SCR Controller, MODBUS, OZSCR1000, SCR controller for heaters, SCR controlled rectifier, SCR motor control