Schneider Electric EM3555 manual Data Logging, Configuration, Reading Data, Read/Write Collision

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EM3555

ZL0093-0A

Data Logging

11/2011

 

 

DATA LOGGING

The EM3555 includes a data logging feature that records 10 meter parameters, each in its own buffer.

Configuration

Use register 150 to set the data logging time subinterval. Writing to the storage buffer is triggered by the subinterval timer. The default subinterval is 15 minutes (at a 15 minute interval setting, the buffers hold 60 days of data). An external timer can be used over Modbus by setting this register to 0.

Use register 159 to turn on data logging and select either Single Shot or Continuous mode. The default settings are data logging on and set to Continuous mode. In Single Shot mode, the meter records data until the buffer is full. When the buffer is full, the meter stops recording new readings. Data for this time period is kept, but newer energy information is lost. In Continuous mode, the meter continues to record energy data as long as the meter is operating. The buffer can only hold 5760 entries at one time, however, so when the number of records exceeds 5760, the oldest entry is deleted to make room for the newest.

Registers 169-178 contain the pointers to 10 data storage buffers. Each buffer is user-configurable with the Modbus address of the 16-bit data output to be stored. Measurement variables with 32-bit data, such as floating point data or

32-bit integer energy accumulators, require two buffers. However, the lower 16 bits of an integer energy accumulator can be stored in a single buffer (optional).

When the EM3555 is first installed, the buffers contain QNAN data, with a value of 0x8000. This data is considered invalid. If the buffer is reset at any point, all entries in the buffers are overwritten with this 0x8000 value, indicating that it is invalid. All invalid data is overwritten as the meter fills the buffer with new data entries.

Reading Data

Use register 158 to choose which buffer to read. When this register value is set to 0, the meter is in data logging mode. Changing this value from 0 (to 1 through 10) switches the meter to reading mode and selects a buffer to read. Data from the selected buffer appears in registers 8000 to 13760.

Read/Write Collision

If the demand sub-interval timeout occurs while the user is reading a page (register 158 ≠ 0), the log data will be held in RAM until the next demand subinterval. At that time, both the saved data from the previous cycle and the new data will be written to the log, whether the page register has been set back to 0 or not. Error bits in the Log Status Register (160) track these conditions. Subsequent log writes will proceed normally. Provided the log read

is concluded in less time than the demand sub-interval, this mechanism handles the occasional collision and prevents the user from reading data as the buffer is being updated.

The Log Status Register has additional error flag bits that indicate whether logging has been reset or interrupted (power cycle, etc.) during the previous demand sub-interval, and whether the Real Time Clock has been changed (re-initialized to default date/time due to a power-cycle or modified via Modbus commands).

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Contents EM3555 FCC Notice Hazard Categories Special SymbolsPlease Note Contents EM3555 ZL0093-0A Contents 11/2011 DIN Rail Mounting Safety PrecautionsInstallation Overview Screw MountingSpecifications Type DescriptionMetering Category SafetyEnvironmental Conditions Parts of the EM Series Observe correct CT orientation when installing the deviceIntroduction Dimensions EM Series DimensionsData Logging Data OutputData Output Full Data Set FDS Installation Attach mounting clips for DIN RailSupported System Types Single-Phase WiringThree-Phase Wiring Supported system typesWiring Symbols WiringSymbol Description Diagram Phase 4-Wire Wye Connection 3 CT 3 PT Wiring DiagramsDiagram Use System Type 11 2LFuse Recommendations Control PowerWiring Notes L1 L2 L3Display Screen Diagram Display ScreenQuick Setup Instructions SOLID-STATE Pulse Output Solid State Pulse OutputsIEC and Ieee Abbreviations UI Menu Abbreviations DefinedMain Menu DescriptionFor Data Configuration EM3555 User Interface for Data Configuration ALERT/RESET Information Ploss Lowpf ERR OVR PulseUser Interface for Setup FromEM3555 ZL0093-0A User Interface for Setup 11/2011 Daisy-chaining Devices to the Power Meter RS-485 CommunicationsReading Data ConfigurationData Logging Read/Write CollisionModbus Default Settings Standard Modbus Default SettingsSetting Value Modbus Register Supported Commands Supported Modbus CommandsCommand Description Modbus Point MAPSunSpec Alliance Interoperability Specification Compliance Integer Data Summary of Active Phases Format Units Scale Range DescriptionFormat Units Scale Range 055 ULong KVARh Accumulated Q1 Reactive 079 ULong KVAh Accumulated Apparent Register 142 NV UInt 143 10000 144 500 250 145 Msec 146 Logging Configuration and Status LSB161 UInt 32767 162 163 164 0xFFFF ULong KWh 165 166 Month Floating Point Data Summary of Active Phases Floating Point Data Per Phase Logging Interface SunSpec Description Name Sunspec Compliant Common and Meter Model Register BlocksRegister Format Units Scale Range SunSpec 1.0 Common ModelSunSpec Description NameSunSpecCompliantCommonandMeterModelRegisterBlocks Event Bit Description Troubleshooting TroubleshootingProblem Cause Solution China Rohs Compliance Information Efup TableEM3555 Installation Guide Schneider Electric

EM3555 specifications

Schneider Electric EM3555 is a highly efficient energy monitoring device that plays a crucial role in optimizing energy management across various applications. As part of Schneider Electric’s extensive range of products, the EM3555 is designed for professionals who seek robust solutions for monitoring energy usage and improving operational efficiency.

One of the main features of the EM3555 is its advanced energy consumption monitoring capabilities. It provides real-time data on electrical parameters, including voltage, current, frequency, power factor, and active/reactive power. This level of detailed information helps organizations understand their energy consumption patterns, identify inefficiencies, and take corrective actions to enhance energy performance.

The EM3555 is equipped with a user-friendly display that allows for easy access and navigation through various metrics. This display offers visibility into key performance indicators and alerts users to any anomalies in energy consumption. Enhanced energy visibility is critical for effective decision-making and is particularly beneficial in environments where energy management is paramount.

In terms of technology, the EM3555 incorporates the latest communication protocols, including Modbus RTU. This feature facilitates seamless integration with existing systems, enabling users to collect and analyze data efficiently. Furthermore, the EM3555 can be connected to Schneider's EcoStruxure platform, which offers advanced analytics and insights into energy usage, harnessing the power of IoT for smarter energy management.

Another notable characteristic of the EM3555 is its compact design, making it suitable for various installation environments, including electrical panels and equipment rooms. The device is built to withstand harsh industrial conditions, ensuring long-term reliability and durability.

In conclusion, the Schneider Electric EM3555 is an exemplary energy monitoring solution that combines advanced features, cutting-edge technology, and robust characteristics. By providing real-time insights into energy consumption, the EM3555 empowers organizations to improve their energy efficiency, reduce costs, and contribute to sustainability goals. Its integration capabilities with other systems further underline its value in contemporary energy management practices. With the EM3555, Schneider Electric continues to lead the way in developing innovative solutions for a more sustainable future.
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