Accuenergy Acuvim 3

Compatibility

Compatible with EpiSensor Edge over Modbus TCP and BACnet/IP, or Modbus RTU

The Acuvim 3 is compatible with EpiSensor Edge over Modbus TCP on either Ethernet port, or Modbus RTU on its RS-485 port, for real-time measurements, and over BACnet/IP for accumulated energy. Accuenergy publishes the Modbus address table with hexadecimal and decimal addresses, data types and units in the parameter names, and a BACnet points list with object numbers and engineering units.

Acuvim 3 meters, panel (D) or DIN-rail (M), using Modbus address table version 1.00, user manual V 1.0.13 and the BACnet points list for firmware v1.04p13 as a best-effort starting point. The map does not state the word order of its floats: site check by reading frequency at 0x2114 and comparing it with the display before adding points. Read-only monitoring: no writes to the reset or reboot commands.

Connect it with

• Modbus Interface ZMB-3X From €399 ex VAT Configure
• Gateway ZGW-20 From €899 ex VAT Configure
• Evaluation Gateway on a Raspberry Pi Edge with one device licensed Free Set up

Models

Specifications

The Acuvim 3 measures three-phase and single-phase systems through external current transformers or sensors, with a fourth current input for measured neutral current. It is a power quality instrument certified to IEC 61000-4-30 Class A, with flicker to IEC 61000-4-15, harmonics to the 127th, waveform capture and EN 50160 and IEEE 519 reports.⁴

Order code

Acuvim-3, then mounting (D: panel mount with LCD display; M: DIN-rail mount without LCD), current input (5A: 5 A/1 A; mV: 333 mV and Rogowski coil), power supply (P1: 100 to 415 V AC, 50/60 Hz, 100 to 300 V DC; P2: 20 to 60 V DC), then optional MC (Measurement Canada) and NW (no Wi-Fi). Examples: Acuvim-3-M-5A-P1-NW, Acuvim-3-D-5A-P2-MC.⁴

Voltage inputs

400 V AC L-N and 690 V AC L-L nominal full scale (+20 %), 40 to 70 Hz, 2 MΩ per phase.⁴

Current inputs

Four channels: 5 A or 1 A CT secondaries (0 to 10 A and 0 to 2 A metering range), 333 mV or Rogowski coil (0 to 400 mV). Withstand 20 A RMS continuous.⁴

Accuracy

Active energy class 0.1S to IEC 62053-22 and class 0.1 to ANSI C12.20; reactive energy class 0.5S to IEC 62053-24; active power class 0.1 and frequency class 0.02 to IEC 61557-12; voltage and current 0.1 %.⁴

Ethernet

Two ports (ETH1, ETH2), separately configurable or bridged with RSTP for daisy chains of up to 32 devices. Modbus TCP server on port 502 (configurable 1 to 65535), unit identifier 1 by default; BACnet/IP on UDP 47808. Ethernet 1 defaults to 192.168.1.254, Ethernet 2 to DHCP.¹

RS-485

Terminals A+, B- and S. Modbus RTU slave or BACnet MS/TP, 9600 to 115200 bit/s (default 115200); parity none, 8 data bits and 1 stop bit, fixed. Address 1 to 247, default 1. Up to 32 devices and 1200 m of AWG22 or heavier shielded twisted pair.¹

Control power

P1: 100 to 415 V AC, 50/60 Hz, or 100 to 300 V DC. P2: 20 to 60 V DC. Installation category III.⁴

Approvals

IEC 61000-4-30 Class A (third-party certified by NMi), IEC 61000-4-15 F1, IEC 62053-22, ANSI C12.20, IEC 61557-12; safety IEC/UL 61010-1 and 61010-2-030; CE and RoHS; BTL listed (B-SA). No MID approval is listed.⁴

Environment

Operating -25 to +70 °C, storage -40 to +70 °C, 5 to 95 % RH non-condensing, altitude below 3000 m, pollution degree 2, indoor use only. IP54 at the front of the panel meter and display; IP30 at the rear, on the DIN-rail meter and on I/O modules.⁴

Interface

Documented measurements and integration boundaries for Acuvim 3.

• The map prints each start and end address in hexadecimal and decimal, and both are the same zero-based PDU address: 0x2114 is decimal 8468 on the wire. A client that numbers holding registers from one shows it as register 8469 (408469). Every measurement sheet names 03H for reading.
• Values are grouped by update rate: a 10 s block from 0x2000, an HS block from 0x200A, the 200 ms block from 0x2100, 3 s aggregation from 0x3000, 10 min from 0x4000 and 2 h from 0x5000. Each block starts with a timestamp (double, four registers) and a valid flag.
• 200 ms block, float in two registers: frequency 0x2114 (Hz); phase voltages A, B and C at 0x2116, 0x2118 and 0x211A with their average at 0x211C (V); line voltages AB, BC and CA at 0x211E, 0x2120 and 0x2122 with their average at 0x2124 (V).
• 200 ms currents: phases A, B and C at 0x2126, 0x2128 and 0x212A, neutral at 0x212C and average at 0x212E (A). Active power per phase at 0x2130, 0x2132 and 0x2134 with the system total at 0x2136 (kW); reactive power 0x2138 to 0x213E (kvar); apparent power 0x2140 to 0x2146 (kVA).
• 200 ms power factor: phases A, B and C at 0x2150, 0x2152 and 0x2154 and system at 0x2156; leading and lagging power factor follow from 0x2158. Units come from the map's parameter names (for example 200MS_P_kW).
• Demand, float: phase current demand from 0x6100 (A) and four-quadrant power demand from 0x6108 (kW, kvar, kVA). Fundamental-only values start at 0x6000.
• The map does not state the word order of its floats. Read frequency at 0x2114 first: 50 or 60 Hz decodes only with the right order. Edge's Modbus client has a big- and little-endian setting for two-register values.
• Accumulated energy is 64-bit: double at 0x65CC (system import, kWh) and 0x65EC (system export, kWh), four registers each, and Int64 copies at 0x674C and 0x676C scaled by the Energy Scale Factor at 0x101D (uint32, factory default 1000). Edge's Modbus client reads 16- and 32-bit values, so read energy over BACnet/IP instead.
• BACnet/IP Analog Inputs, kWh: 2053 to 2056 active energy import for phases A, B, C and the system; 2061 to 2064 export; 2072 net and 2080 total for the system. Real-time objects start at 1 (frequency, Hz), 2 to 4 (phase voltages, V), 10 to 12 (phase currents, A) and 18 (system active power, kW).
• Configuration from 0x1000 is read-only over Modbus: nominal voltage and current, service configuration at 0x1005, PT input and output at 0x1006 and 0x1008, CT input and output at 0x100A and 0x100C (uint32). Product type, hardware and software version strings start at 0xF000.
• FC16 writes reset energy (0x12A0), maximum demand (0x12A1), max and min (0x12A2) and DI counters (0x12A3), and 0xF2C0 reboots the meter. Keep all of them out of a monitoring poll.

Setup

1. Put the meter on the Gateway's network

   Ethernet 1 defaults to 192.168.1.254/24 and Ethernet 2 to DHCP. Sign in to the web interface, change the default admin and view passwords, and set an address on the Gateway's network. If the IP whitelist is on, add the Gateway.

2. Check the Modbus TCP and BACnet settings

   Under Settings, Communication, Modbus, confirm Modbus TCP is enabled on port 502 and note the slave address (default 1). Under BACnet, enable BACnet/IP with a unique device instance if Edge will read energy.

3. Find the word order

   Read two registers at 0x2114 with FC03 and decode them as a float in both word orders, as in the worked read below. Keep the order that gives 50 or 60 Hz and compare it with the display.

4. Add real-time points

   Add voltage, current, power and power factor from the 200 ms block with the same word order. The map names give the units: V, A, kW, kvar and kVA.

5. Add energy over BACnet/IP

   Read Analog Input 2056 (import) and 2064 (export) in kWh and compare them with the energy page on the display. Keep the FC16 reset and reboot registers out of the configuration.

Common questions

Why can Edge not read Acuvim 3 energy over Modbus?

The address table publishes accumulated energy only as 64-bit values: double at 0x65CC and 0x65EC, and Int64 at 0x674C and 0x676C, four registers each. Edge's Modbus client reads 16- and 32-bit values. Read energy as BACnet/IP Analog Inputs 2056 and 2064 instead, which carry kWh.^2, 3

Which word order does the Acuvim 3 use for floats?

The address table version 1.00 and the manual do not say. Read frequency at 0x2114: only one word order gives 50 or 60 Hz. Use that order for the rest of the float block.^1, 2

Which block should I poll: 200 ms, 3 s or 10 min?

For energy monitoring, the 200 ms block from 0x2100 gives instantaneous values. The 3 s, 10 min and 2 h blocks hold IEC 61000-4-30 aggregations, and each block carries its own timestamp and valid flag.²

What are the default serial settings?

Modbus RTU, slave address 1, 115200 bit/s, 8N1, on both RS-485 and USB. Baud rate can be set from 9600 to 115200; parity, data bits and stop bit are fixed.¹

Can the Acuvim 3 be used for billing under MID?

Not on the strength of these documents. The datasheet gives class 0.1S to IEC 62053-22 and class 0.1 to ANSI C12.20, and an MC version for Measurement Canada, but lists no MID approval.⁴