Carlo Gavazzi · ModbusEM24-DIN PFA/PFB/X RS-485

Read-only starter map for the EM24-DIN PFA, PFB and X RS-485 models covered by Carlo Gavazzi's Communication Protocol Version 4 Revision 0. Uses FC04, the documented physical offsets and scaled signed integers.

Register map

Zero-based Modbus PDU addresses, with the decode, scale and reporting the download applies.

Swipe to see every column

Edge point	PDU address	Function	Format	Decode	Scale	Reporting	Unit
Voltage L1-N	0	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Voltage L2-N	2	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Voltage L3-N	4	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Voltage L1-L2	6	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Voltage L2-L3	8	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Voltage L3-L1	10	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Current L1	12	FC4	int32	Big endian · word swapped · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	A
Current L2	14	FC4	int32	Big endian · word swapped · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	A
Current L3	16	FC4	int32	Big endian · word swapped · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	A
Active Power L1	18	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	W
Active Power L2	20	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	W
Active Power L3	22	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	W
Apparent Power L1	24	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VA
Apparent Power L2	26	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VA
Apparent Power L3	28	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VA
Reactive Power L1	30	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VAr
Reactive Power L2	32	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VAr
Reactive Power L3	34	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VAr
Average Voltage L-N	36	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Average Voltage L-L	38	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	V
Total Active Power	40	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	W
Total Apparent Power	42	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VA
Total Reactive Power	44	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	VAr
Power Factor L1	50	FC4	int16	Big endian · normal word order · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	–
Power Factor L2	51	FC4	int16	Big endian · normal word order · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	–
Power Factor L3	52	FC4	int16	Big endian · normal word order · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	–
Total Power Factor	53	FC4	int16	Big endian · normal word order · normal byte order	×0.001 · offset 0	Every 60 s · export off · read only	–
Frequency	55	FC4	int16	Big endian · normal word order · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	Hz
Import Active Energy	62	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	kWh
Import Reactive Energy	64	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	kVArh
Export Active Energy	92	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	kWh
Export Reactive Energy	94	FC4	int32	Big endian · word swapped · normal byte order	×0.1 · offset 0	Every 60 s · export off · read only	kVArh

Prove the decode before rollout

This template applies to the EM24-DIN PFA, PFB and X RS-485 models covered by the cited protocol. Do not apply it to the EM24_E1 Ethernet model: that model has a separate, incompatible definition.

The source's physical hexadecimal addresses are used directly as zero-based PDU addresses. Function code 04 is selected from the documented read-only functions 03 and 04.

Carlo Gavazzi documents MSB-first bytes inside each 16-bit word and LSW-first word order for INT32 values. Edge therefore uses big-endian bytes with word_swap true for every 32-bit point; the 16-bit power-factor and frequency points keep normal word order.

The meter signals measurement overflow with 7FFFh in the most-significant word. Compare voltage, current and total power with the front panel and reject overflow values before enabling downstream alarms or exports.

Applying the file replaces the selected device's current Modbus sensor list. It does not change the Gateway connection, server address, Modbus unit ID, device enable state or export identifiers.

What the download changes

When applied in Edge, the file replaces the selected device's current Modbus sensor list with these 32 read-only points. It does not change the Gateway connection, server address, Modbus unit ID, device enable state or export identifiers. Back up or duplicate a customised definition before applying it.

Import, apply, then prove one known value

1
Download the reviewed JSON
Sign in with an account that has approved Edge download access.
2
Import in Edge
Open Settings → Device Templates, choose Import, and select the downloaded file.
3
Apply to the exact model
Use a new or backed-up device definition, then choose its existing Gateway connection and unit address. Applying the template replaces that definition's current sensor list.
4
Commission before rollout
Check identity, value, unit and timestamp against one known condition before enabling exports or repeating the setup.

Ready to import

Revision 1.0.0, reviewed 20 Sept 2026.

Download JSON

Sources

EM24-DIN PFA, PFB & X models - Communication Protocol (opens in a new tab) (PDF) Carlo Gavazzi Controls · Version 4 Revision 0 · 03 December 2012

This template applies only to Carlo Gavazzi EM24-DIN PFA/PFB/X RS-485. Product names and trademarks belong to their respective owners; publication does not imply endorsement or a commercial relationship.