Cewe CDM, Prometer 100 MODBUS registers: read online

Connect Cewe to the computer through a USB-to-serial or RS485 adapter and read its registers in your browser: click "Read register values online" under the model (Chrome or Edge, nothing to install). The tables below list the MODBUS offset, unit, data type and scale of every register shown. For logging 24/7 into a database, CSV files or Excel, use the Advanced Serial Data Logger (for MODBUS RTU) or Advanced TCP/IP Data Logger (for MODBUS TCP): they poll the complete map of every model on this page and provide continuous Cewe logger and poll.

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Cewe (CDM) - Measurement Data

Connection and addressing notes

Protocol: Modbus
Interface: RS-485 (RS485 communication module)
Alternative interface: LAN gateway module
Register set 0: default, integer bank at hex 0000, IEEE float bank at hex 1000
Register set 1: even words only
Register set 1 requirement: integrated communication or RS485 module with firmware 2.00 or later
Active register bank: set 0 IEEE float bank
Function codes: 01 read coils, 03 read holding registers, 04 read input registers

Registers in the map: 164 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: single.

MODBUS offset	Description	Units	Data type
4096	V1 L N voltage phase 1	V	single
4098	V2 L N voltage phase 2	V	single
4100	V3 L N voltage phase 3	V	single
4102	V12 L L voltage line 12	V	single
4104	V23 L L voltage line 23	V	single
4106	V31 L L voltage line 31	V	single
4108	V system voltage	V	single
4110	A1 phase 1 current	A	single
4112	A2 phase 2 current	A	single
4114	A3 phase 3 current	A	single
4116	An neutral current	A	single
4118	A system current	A	single
4120	PF1 phase 1 power factor		single
4122	PF2 phase 2 power factor		single
4124	PF3 phase 3 power factor		single
4126	Pf system power factor		single
4128	P1 phase 1 active power	W	single
4130	P2 phase 2 active power	W	single
4132	P3 phase 3 active power	W	single
4134	P system active power	W	single
4136	S1 phase 1 apparent power	VA	single
4138	S2 phase 2 apparent power	VA	single
4140	S3 phase 3 apparent power	VA	single
4142	S system apparent power	VA	single
4144	Q1 phase 1 reactive power	var	single
4146	Q2 phase 2 reactive power	var	single
4148	Q3 phase 3 reactive power	var	single
4150	Q system reactive power	var	single
4152	F frequency	Hz	single
4352	+kwh1 phase 1 imported active energy	Wh	single
4354	+kwh2 phase 2 imported active energy	Wh	single
4356	+kwh3 phase 3 imported active energy	Wh	single
4358	+kwh system imported active energy	Wh	single
4360	Kwh1 phase 1 exported active energy	Wh	single
4362	Kwh2 phase 2 exported active energy	Wh	single
4364	Kwh3 phase 3 exported active energy	Wh	single
4366	Kwh system exported active energy	Wh	single
4368	+kvah1 L phase 1 imported lagging apparent energy	VAh	single
4370	+kvah2 L phase 2 imported lagging apparent energy	VAh	single
4372	+kvah3 L phase 3 imported lagging apparent energy	VAh	single
4374	+kvah L system imported lagging apparent energy	VAh	single
4376	Kvah1 L phase 1 exported lagging apparent energy	VAh	single
4378	Kvah2 L phase 2 exported lagging apparent energy	VAh	single
4380	Kvah3 L phase 3 exported lagging apparent energy	VAh	single
4382	Kvah L system exported lagging apparent energy	VAh	single
4384	+kvah1 C phase 1 imported leading apparent energy	VAh	single
4386	+kvah2 C phase 2 imported leading apparent energy	VAh	single
4388	+kvah3 C phase 3 imported leading apparent energy	VAh	single
4390	+kvah C system imported leading apparent energy	VAh	single
4392	Kvah1 C phase 1 exported leading apparent energy	VAh	single

This is not the complete map: 50 of 164 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Cewe (Prometer 100) - MODBUS Registers Map

Connection and addressing notes

Protocol: Modbus
Device address range: 1-247
Address register: 1051 (MSR) and 1052 (LSR)
Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600
Baud rate register: 1053 and 1054, value written in hex (9600 = 0x2580)
Query response timeout: 1000 ms
Polling delay: 1000 ms
Register order: 32-bit values most significant register first

Registers in the map: 466 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 4 (input registers). byte order big-endian. data types: single, word.

MODBUS offset	Description	Units	Data type
19	Protocol version		word
1012	Meter primary voltage	V	single
1014	Meter secondary voltage	V	single
1016	Meter primary current	A	single
1018	Meter secondary current	A	single
1020	Meter maximum current	A	single
1022	Meter type: 0 - HT3, 1 - HT4, 2 - LT 3CT 4W		single
1100	Phase voltage L1	V	single
1102	Phase voltage L2	V	single
1104	Phase voltage L3	V	single
1106	Phase to phase voltage L1 - L2	V	single
1108	Phase to phase voltage L2 - L3	V	single
1110	Phase to phase voltage L3 - L1	V	single
1112	Line current L1	A	single
1114	Line current L2	A	single
1116	Line current L3	A	single
1118	Three phase average voltages % of vnominal	%	single
1120	All phase power factor		single
1122	Frequency hz	Hz	single
1124	All phase active power (Total)	kW	single
1126	All phase reactive power	kvar	single
1128	All phase apparent power	kVA	single
1130	All phase active power (Fundamental)	kW	single
1200	Phase symmetry voltage L1	deg	single
1202	Phase symmetry voltage L2	deg	single
1204	Phase symmetry voltage L3	deg	single
1206	Phase symmetry current L1	deg	single
1208	Phase symmetry current L2	deg	single
1210	Phase symmetry current L3	deg	single
1212	THD voltage L1	%	single
1214	THD voltage L2	%	single
1216	THD voltage L3	%	single
1218	THD current L1	%	single
1220	THD current L2	%	single
1222	THD current L3	%	single
1224	THD power L1	%	single
1226	THD power L2	%	single
1228	THD power L3	%	single
1300	Active power L1(T)	kW	single
1302	Active power L2(T)	kW	single
1304	Active power L3(T)	kW	single
1306	Active power L1(F)	kW	single
1308	Active power L2(F)	kW	single
1310	Active power L3(F)	kW	single
1312	Reactive power L1	kvar	single
1314	Reactive power L2	kvar	single
1316	Reactive power L3	kvar	single
1318	Apparent power L1	kVA	single
1320	Apparent power L2	kVA	single
1322	Apparent power L3	kVA	single

This is not the complete map: 50 of 466 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Cewe (Prometer) - MODBUS Mapping

Registers in the map: 76 (the first 50 are listed below; the browser reader and the data loggers use the complete map). function 3 (holding registers). byte order big-endian. data types: double, single.

MODBUS offset	Description	Units	Data type
0	Phase voltage L1 1	V	single
2	Phase voltage L2		single
4	Phase voltage L3		single
6	Main voltage L1-L2	V	single
8	Main voltage L2-L3		single
10	Main voltage L3-L1		single
12	Current L1	A	single
14	Current L2		single
16	Current L3		single
18	Phase symmetry voltage L1 2	rad	single
20	Phase symmetry voltage L2		single
22	Phase symmetry voltage L3		single
24	Phase symmetry current L1	rad	single
26	Phase symmetry current L2		single
28	Phase symmetry current L3		single
30	Phase angle L1	rad	single
32	Phase angle L2		single
34	Phase angle L3		single
36	Power factor L1		single
38	Power factor L2		single
40	Power factor L3		single
42	Active power L1 4	W	single
44	Active power L2		single
46	Active power L3		single
48	Reactive power L1 4	var	single
50	Reactive power L2		single
52	Reactive power L3		single
54	Apparent power L1	VA	single
56	Apparent power L2		single
58	Apparent power L3		single
60	THD voltage L1 5		single
62	THD voltage L2		single
64	THD voltage L3		single
66	THD current L1 5		single
68	THD current L2		single
70	THD current L3		single
72	Total active power 4	W	single
74	Total reactive power 4	var	single
76	Total apparent power	VA	single
78	Total power factor		single
80	Total phase angle	rad	single
82	Frequency	Hz	single
84	Voltage transformer ratio		single
86	Current transformer ratio		single
88	Secondary nominal voltage 3	V	single
90	Secondary nominal current	A	single
92	Voltage L1		single
94	Voltage L1: fundamental value		single
96	Voltage L1: 1st harmonic value		single
154	Voltage L2		single

This is not the complete map: 50 of 76 registers are listed above. Click "Read register values online" to read any register of your device in the browser, or download the program to log the complete map.

Related MODBUS registers maps

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Cewe CDM, Prometer 100 MODBUS registers: read online

Cewe (CDM) - Measurement Data

Cewe (Prometer 100) - MODBUS Registers Map

Cewe (Prometer) - MODBUS Mapping

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