Energy meter ABB B23

Installation

1. 1Wire the ModbusCloud gateway (MCG or MLP series) to the RS-485 terminals on the ABB B23 using a twisted-pair cable with correct A/B polarity.
2. 2On the ABB B23 display menu, verify that Modbus RTU is enabled, the baud rate is set to 19200, and note the configured slave address.
3. 3In the ModbusCloud portal, add a new device, select the ABB B23 template, and enter the slave address that matches the meter.
4. 4Set the gateway serial port to 19200 baud, 8 data bits, 1 stop bit, and even parity (or match whatever parity is configured on the meter).
5. 5Power on the gateway and confirm that live readings for voltage, current, and power appear in the ModbusCloud dashboard.

Things to watch for

01

I see zero values or communication errors for all registers. What should I check?

Verify that the RS-485 A and B wires are not swapped. Also confirm that the baud rate on the gateway matches the meter setting of 19200. Check that the Modbus slave address in the template matches the address configured on the B23 display.

02

The active import energy reading seems too low or incorrect. Why?

The active import energy is split across two register pairs (low bit and high bit, each uint32). If only one pair is read, the value will be incomplete. The template combines both pairs automatically, but make sure no register offsets have been manually changed.

03

Which parity setting should I use?

The ABB B23 defaults to even parity in most firmware versions. Set your gateway to 19200 baud, 8 data bits, even parity, and 1 stop bit. If communication fails, check the parity setting on the meter display and match it on the gateway.

04

Can I connect multiple ABB B23 meters to the same Modbus gateway?

Yes. Assign a unique slave address to each meter using its front-panel menu. Then add a separate device entry in ModbusCloud for each address, all using the same ABB B23 template.

Registers (13)

13 read / 0 write

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