Gossen Metrawatt ENERGYMID EM2389
MID-certified three-phase energy meter for current transformers, with power, quality and energy per tariff.
The Gossen Metrawatt ENERGYMID EM2389 is a MID-certified three-phase energy meter for current and voltage transformers that measures energy, power and power quality in distribution boards. This Modbus RTU template reads voltages, currents, power, power factor, frequency and energy per tariff, and lets you set the tariff, transformer ratios and clock from ModbusCloud.
- Protocol
- Modbus RTU
- Connection
- RS485, 9600 baud
- Registers
- 273, read and write
- Brand
- Gossen Metrawatt
- Key readings
- Voltage per phase · Current per phase · Active power · Reactive power · Power factor · Frequency · Energy import and export · Energy per tariff
- Available commands
- Tariff selection · CT and VT ratio · Meter clock · Billing date · Counter reset date
- Compatible models
- ENERGYMID EM2389 (U2389, Modbus RTU feature W7) · ENERGYMID EM2289 (U2289, W7) · ENERGYMID EM2387 (U2387, W7) · ENERGYMID EM2381 (U2381, W7) · ENERGYMID EM2281 (U2281, W7)
- Last updated
Registers (273)
273 read, 9 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Voltage L1-L2 | V | Read | |||
| Voltage L2-L3 | V | Read | |||
| Voltage L3-L1 | V | Read | |||
| Voltage L-L Average | V | Read | |||
| Voltage L1-N | V | Read | |||
| Voltage L2-N | V | Read | |||
| Voltage L3-N | V | Read | |||
| Voltage L-N Average | V | Read | |||
| THD Voltage L1-N | Read | ||||
| THD Voltage L2-N | Read | ||||
| THD Voltage L3-N | Read | ||||
| Frequency | Hz | Read | |||
| Voltage Exponent | Read | ||||
| Voltage Error Flags 1 | Read | ||||
| Voltage Error Flags 2 | Read | ||||
| Current L1 | A | Read | |||
| Current L2 | A | Read | |||
| Current L3 | A | Read | |||
| Current Average | A | Read | |||
| Current N | A | Read | |||
| THD Current L1 | Read | ||||
| THD Current L2 | Read | ||||
| THD Current L3 | Read | ||||
| Current Exponent | Read | ||||
| Current Error Flags 1 | Read | ||||
| Current Error Flags 2 | Read | ||||
| Active Power L1 | W | Read | |||
| Active Power L2 | W | Read | |||
| Active Power L3 | W | Read | |||
| Active Power Total | W | Read | |||
| Reactive Power L1 | var | Read | |||
| Reactive Power L2 | var | Read | |||
| Reactive Power L3 | var | Read | |||
| Reactive Power Total | var | Read | |||
| Power Factor L1 | Read | ||||
| Power Factor L2 | Read | ||||
| Power Factor L3 | Read | ||||
| Power Factor Total | Read | ||||
| Primary Power Exponent | Read | ||||
| Secondary Active Power Total | W | Read | |||
| Secondary Power Exponent | Read | ||||
| Power Error Flags 1 | Read | ||||
| Power Error Flags 2 | Read | ||||
| Total Active Energy Import | Wh | Read | |||
| Total Active Energy Export | Wh | Read | |||
| Total Reactive Energy Import | varh | Read | |||
| Total Reactive Energy Export | varh | Read | |||
| Total Energy Factor | Read | ||||
| Total Energy Exponent | Read | ||||
| Total Energy Type | Read | ||||
| Total Error Flags 1 | Read | ||||
| Total Error Flags 2 | Read | ||||
| Active Tariff Active Energy Import | Wh | Read | |||
| Active Tariff Active Energy Export | Wh | Read | |||
| Active Tariff Reactive Energy Import | varh | Read | |||
| Active Tariff Reactive Energy Export | varh | Read | |||
| Active Tariff Energy Factor | Read | ||||
| Active Tariff Energy Exponent | Read | ||||
| Active Tariff Energy Type | Read | ||||
| Active Tariff | Read | ||||
| Active Tariff Error Flags 1 | Read | ||||
| Active Tariff Error Flags 2 | Read | ||||
| Operating Hours | h | Read | |||
| Operating Hours Since Reset | h | Read | |||
| Last Billing Date Seconds Minutes | Read | ||||
| Last Billing Date Hours Day | Read | ||||
| Last Billing Date Month Year Low | Read | ||||
| Last Billing Date Year High | Read | ||||
| Last Reset Date Seconds Minutes | Read | ||||
| Last Reset Date Hours Day | Read | ||||
| Last Reset Date Month Year Low | Read | ||||
| Last Reset Date Year High | Read | ||||
| Tariff 1 Active Energy Import | Wh | Read | |||
| Tariff 1 Active Energy Export | Wh | Read | |||
| Tariff 1 Reactive Energy Import | varh | Read | |||
| Tariff 1 Reactive Energy Export | varh | Read | |||
| Tariff 1 Energy Factor | Read | ||||
| Tariff 1 Energy Exponent | Read | ||||
| Tariff 1 Energy Type | Read | ||||
| Tariff 1 Error Flags 1 | Read | ||||
| Tariff 1 Error Flags 2 | Read | ||||
| Tariff 2 Active Energy Import | Wh | Read | |||
| Tariff 2 Active Energy Export | Wh | Read | |||
| Tariff 2 Reactive Energy Import | varh | Read | |||
| Tariff 2 Reactive Energy Export | varh | Read | |||
| Tariff 2 Energy Factor | Read | ||||
| Tariff 2 Energy Exponent | Read | ||||
| Tariff 2 Energy Type | Read | ||||
| Tariff 2 Error Flags 1 | Read | ||||
| Tariff 2 Error Flags 2 | Read | ||||
| Tariff 3 Active Energy Import | Wh | Read | |||
| Tariff 3 Active Energy Export | Wh | Read | |||
| Tariff 3 Reactive Energy Import | varh | Read | |||
| Tariff 3 Reactive Energy Export | varh | Read | |||
| Tariff 3 Energy Factor | Read | ||||
| Tariff 3 Energy Exponent | Read | ||||
| Tariff 3 Energy Type | Read | ||||
| Tariff 3 Error Flags 1 | Read | ||||
| Tariff 3 Error Flags 2 | Read | ||||
| Tariff 4 Active Energy Import | Wh | Read | |||
| Tariff 4 Active Energy Export | Wh | Read | |||
| Tariff 4 Reactive Energy Import | varh | Read | |||
| Tariff 4 Reactive Energy Export | varh | Read | |||
| Tariff 4 Energy Factor | Read | ||||
| Tariff 4 Energy Exponent | Read | ||||
| Tariff 4 Energy Type | Read | ||||
| Tariff 4 Error Flags 1 | Read | ||||
| Tariff 4 Error Flags 2 | Read | ||||
| Tariff 5 Active Energy Import | Wh | Read | |||
| Tariff 5 Active Energy Export | Wh | Read | |||
| Tariff 5 Reactive Energy Import | varh | Read | |||
| Tariff 5 Reactive Energy Export | varh | Read | |||
| Tariff 5 Energy Factor | Read | ||||
| Tariff 5 Energy Exponent | Read | ||||
| Tariff 5 Energy Type | Read | ||||
| Tariff 5 Error Flags 1 | Read | ||||
| Tariff 5 Error Flags 2 | Read | ||||
| Tariff 6 Active Energy Import | Wh | Read | |||
| Tariff 6 Active Energy Export | Wh | Read | |||
| Tariff 6 Reactive Energy Import | varh | Read | |||
| Tariff 6 Reactive Energy Export | varh | Read | |||
| Tariff 6 Energy Factor | Read | ||||
| Tariff 6 Energy Exponent | Read | ||||
| Tariff 6 Energy Type | Read | ||||
| Tariff 6 Error Flags 1 | Read | ||||
| Tariff 6 Error Flags 2 | Read | ||||
| Tariff 7 Active Energy Import | Wh | Read | |||
| Tariff 7 Active Energy Export | Wh | Read | |||
| Tariff 7 Reactive Energy Import | varh | Read | |||
| Tariff 7 Reactive Energy Export | varh | Read | |||
| Tariff 7 Energy Factor | Read | ||||
| Tariff 7 Energy Exponent | Read | ||||
| Tariff 7 Energy Type | Read | ||||
| Tariff 7 Error Flags 1 | Read | ||||
| Tariff 7 Error Flags 2 | Read | ||||
| Tariff 8 Active Energy Import | Wh | Read | |||
| Tariff 8 Active Energy Export | Wh | Read | |||
| Tariff 8 Reactive Energy Import | varh | Read | |||
| Tariff 8 Reactive Energy Export | varh | Read | |||
| Tariff 8 Energy Factor | Read | ||||
| Tariff 8 Energy Exponent | Read | ||||
| Tariff 8 Energy Type | Read | ||||
| Tariff 8 Error Flags 1 | Read | ||||
| Tariff 8 Error Flags 2 | Read | ||||
| Tariff 1 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 1 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 1 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 1 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 1 Billing Date Energy Factor | Read | ||||
| Tariff 1 Billing Date Energy Exponent | Read | ||||
| Tariff 1 Billing Date Energy Type | Read | ||||
| Tariff 2 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 2 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 2 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 2 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 2 Billing Date Energy Factor | Read | ||||
| Tariff 2 Billing Date Energy Exponent | Read | ||||
| Tariff 2 Billing Date Energy Type | Read | ||||
| Tariff 3 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 3 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 3 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 3 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 3 Billing Date Energy Factor | Read | ||||
| Tariff 3 Billing Date Energy Exponent | Read | ||||
| Tariff 3 Billing Date Energy Type | Read | ||||
| Tariff 4 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 4 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 4 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 4 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 4 Billing Date Energy Factor | Read | ||||
| Tariff 4 Billing Date Energy Exponent | Read | ||||
| Tariff 4 Billing Date Energy Type | Read | ||||
| Tariff 5 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 5 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 5 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 5 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 5 Billing Date Energy Factor | Read | ||||
| Tariff 5 Billing Date Energy Exponent | Read | ||||
| Tariff 5 Billing Date Energy Type | Read | ||||
| Tariff 6 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 6 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 6 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 6 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 6 Billing Date Energy Factor | Read | ||||
| Tariff 6 Billing Date Energy Exponent | Read | ||||
| Tariff 6 Billing Date Energy Type | Read | ||||
| Tariff 7 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 7 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 7 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 7 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 7 Billing Date Energy Factor | Read | ||||
| Tariff 7 Billing Date Energy Exponent | Read | ||||
| Tariff 7 Billing Date Energy Type | Read | ||||
| Tariff 8 Billing Date Active Energy Import | Wh | Read | |||
| Tariff 8 Billing Date Active Energy Export | Wh | Read | |||
| Tariff 8 Billing Date Reactive Energy Import | varh | Read | |||
| Tariff 8 Billing Date Reactive Energy Export | varh | Read | |||
| Tariff 8 Billing Date Energy Factor | Read | ||||
| Tariff 8 Billing Date Energy Exponent | Read | ||||
| Tariff 8 Billing Date Energy Type | Read | ||||
| Tariff 1 Resettable Active Energy Import | Wh | Read | |||
| Tariff 1 Resettable Active Energy Export | Wh | Read | |||
| Tariff 1 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 1 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 1 Resettable Energy Factor | Read | ||||
| Tariff 1 Resettable Energy Exponent | Read | ||||
| Tariff 1 Resettable Energy Type | Read | ||||
| Tariff 2 Resettable Active Energy Import | Wh | Read | |||
| Tariff 2 Resettable Active Energy Export | Wh | Read | |||
| Tariff 2 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 2 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 2 Resettable Energy Factor | Read | ||||
| Tariff 2 Resettable Energy Exponent | Read | ||||
| Tariff 2 Resettable Energy Type | Read | ||||
| Tariff 3 Resettable Active Energy Import | Wh | Read | |||
| Tariff 3 Resettable Active Energy Export | Wh | Read | |||
| Tariff 3 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 3 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 3 Resettable Energy Factor | Read | ||||
| Tariff 3 Resettable Energy Exponent | Read | ||||
| Tariff 3 Resettable Energy Type | Read | ||||
| Tariff 4 Resettable Active Energy Import | Wh | Read | |||
| Tariff 4 Resettable Active Energy Export | Wh | Read | |||
| Tariff 4 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 4 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 4 Resettable Energy Factor | Read | ||||
| Tariff 4 Resettable Energy Exponent | Read | ||||
| Tariff 4 Resettable Energy Type | Read | ||||
| Tariff 5 Resettable Active Energy Import | Wh | Read | |||
| Tariff 5 Resettable Active Energy Export | Wh | Read | |||
| Tariff 5 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 5 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 5 Resettable Energy Factor | Read | ||||
| Tariff 5 Resettable Energy Exponent | Read | ||||
| Tariff 5 Resettable Energy Type | Read | ||||
| Tariff 6 Resettable Active Energy Import | Wh | Read | |||
| Tariff 6 Resettable Active Energy Export | Wh | Read | |||
| Tariff 6 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 6 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 6 Resettable Energy Factor | Read | ||||
| Tariff 6 Resettable Energy Exponent | Read | ||||
| Tariff 6 Resettable Energy Type | Read | ||||
| Tariff 7 Resettable Active Energy Import | Wh | Read | |||
| Tariff 7 Resettable Active Energy Export | Wh | Read | |||
| Tariff 7 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 7 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 7 Resettable Energy Factor | Read | ||||
| Tariff 7 Resettable Energy Exponent | Read | ||||
| Tariff 7 Resettable Energy Type | Read | ||||
| Tariff 8 Resettable Active Energy Import | Wh | Read | |||
| Tariff 8 Resettable Active Energy Export | Wh | Read | |||
| Tariff 8 Resettable Reactive Energy Import | varh | Read | |||
| Tariff 8 Resettable Reactive Energy Export | varh | Read | |||
| Tariff 8 Resettable Energy Factor | Read | ||||
| Tariff 8 Resettable Energy Exponent | Read | ||||
| Tariff 8 Resettable Energy Type | Read | ||||
| Device Information | Read | ||||
| Operating Log Latest Entry | Read | ||||
| Operating Log Previous Entry | Read | ||||
| Operating Log Next Entry | Read | ||||
| Load Profile Latest Entry | Read | ||||
| Load Profile Previous Entry | Read | ||||
| Load Profile Next Entry | Read | ||||
| Interface Version | Read | ||||
| Current Transformer Ratio | Read and write | ||||
| Voltage Transformer Ratio | Read and write | ||||
| Modbus Address | Read and write | ||||
| Baud Rate | Read and write | ||||
| Load Profile Period | min | Read and write | |||
| Tariff Selection | Read and write | ||||
| Device Clock | Read and write | ||||
| Next Reset Date | Read and write | ||||
| Next Billing Date | Read and write |
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If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Show power, voltage and current of every feeder in a building on one dashboard next to the other meters.
- Send an e-mail when a phase voltage drops or the error flags report a fault on the meter.
- Keep a history of energy import and export to see consumption per day, week or month.
- Switch the tariff from ModbusCloud so that day and night consumption land in separate registers.
- Read the billing date values of all tariffs at the end of the month without walking to the board.
Installation
Connect terminal A (+) and B (-) of the meter to the RS485 port of the ModbusCloud Gateway with a twisted, shielded pair. Terminate both ends of the bus with 100 to 150 ohm.
In the Modbus menu of the meter, set a unique address, the baud rate and the frame. The default frame is 8 data bits, even parity, 1 stop bit.
In ModbusCloud, add a Modbus device with the same address and serial settings and import this template.
Check that voltage, frequency and the energy counters come in, and read the exponent and factor registers once to know the scaling.
Things to watch for
The meter does not answer. What should I check?
Compare address, baud rate and frame in the Modbus menu of the meter with ModbusCloud; the default frame is 8E1. On this meter A is plus and B is minus, other devices sometimes swap them. Terminate both ends of the bus. The meter needs about 5 seconds after power-up before it answers.
Why does the voltage read 2309 instead of 230.9 V?
Voltage, current and power are sent as a number with a separate power of ten in an exponent register. With an exponent of -1, 2309 means 230.9 V. Energy works the same way with a factor register. Read the exponent and factor once, they only change with the measuring range or the transformer ratio.
How many meters can I connect to one bus?
Each ENERGYMID uses one eighth of a standard RS485 load, so up to 256 of these meters fit on one segment of at most 1000 m. Give every meter its own address and wire the bus as a line, not as a star.
The tariff does not change when I write it.
The first switch from the tariff input on the meter to tariff control over Modbus only works after the release key on the meter has been pressed. After that you can write tariff 1 to 8 at any time, and 0 hands control back to the tariff input. Tariffs 5 to 8 are outside the MID approval.
What should I keep in mind when writing settings?
CT and VT ratio can only be written on transformer meters with adjustable ratios, and CT times VT has a limit. The clock, billing date and reset date are written as one block of four registers. A new Modbus address or baud rate takes effect at once, so change ModbusCloud right after.
Want to see how it works?
