Socomec Countis E33 Countis E43 Modbus register map

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Sources and notes

• Countis E43 MODBUS active energy meters communication table · version CMT201266, table V 201.274, 2019-09
  Whole table except reserved, command, record and date registers

• Checked against the Countis E43 table only. That document does not name the E33; the E33 may need the E34/E44 table (a different, older version with its own differences), so treat E33 as unconfirmed.
• The slave address is at 58368 in this table, not in the 57344 group.
• Addresses are the decimal addresses printed in the table, sent as written (address_base 0). Registers are read as holding registers.
• Scales follow the table's unit column (for example V/100 becomes a scale of 0.01); energy counters are in kWh, kvarh and kVAh, or in 10 Wh steps in the second set.
• The table gives neither function codes nor byte or word order: big-endian with the high word first is assumed (Socomec convention). Not tested on a device.
• Values the table types as 8-bit sit in one 16-bit register and are read as uint16. Date and time, 64-bit, record and command registers (resets, tariff selection) are not mapped.