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Eaton IQ 250 / IQ 260 Electronic Power Meter Modbus register map
Updated 16 October 2026
The IQ 250 and IQ 260 are panel-mount multifunction power meters with a serial COM2 port (Modbus RTU, Modbus ASCII or DNP) and optional plug-in cards, including a network card for Modbus TCP. Everything sits in holding registers: live readings and demand values are IEEE floats in primary units, while status, THD and angles are 16-bit integers. This map covers identification, primary readings, demand, maximum demand, phase angles, status, THD, reset commands and the CT/PT and COM2 settings.
This page lists 97 Modbus registers for the Eaton IQ 250 / IQ 260 Electronic Power Meter — 19 writable — with the table, 0-based wire address, data type, word order, scale, units and access of each, re-typed from Eaton’s own free documentation (linked below) and checked against it.
- Manufacturer
- Eaton
- Model
- IQ 250 / IQ 260 Electronic Power Meter
- Equipment type
- Power meter
- Registers
- 97 (19 writable)
- Transport
- Modbus RTU, Modbus ASCII, Modbus TCP
- Default unit ID
- Not stated
- Documented addressing
- 1-based (subtract 1 for the wire address)
- 32-bit word order
- ABCD high word first (big-endian)
- Also known as
- IQ 250, IQ 260, IQ 250L, IQ 260L, IQ250, IQ260
Integration notes: Eaton IQ 250 / IQ 260 Electronic Power Meter
Poll holding registers 999-1028 (wire) with function 03 to get voltages, currents, totals, PF and frequency as big-endian floats in primary units; read the demand block at 1999 and the status word at 4500. Settings changes need a password-protected privileged session and settings-update mode.
Minimum registers to map
Addresses are 0-based wire addresses. Enough to monitor and run the unit; map more as the job needs.
| Register | Name | Type | Why | Access |
|---|---|---|---|---|
| HR 999 | Volts A-N | FLOAT32 ABCD | Volts A-N | Read |
| HR 1011 | Amps A | FLOAT32 ABCD | Amps A | Read |
| HR 1017 | Watts, 3-Ph total | FLOAT32 ABCD | Total watts | Read |
| HR 1023 | Power Factor, 3-Ph total | FLOAT32 ABCD | Total power factor | Read |
| HR 1025 | Frequency | FLOAT32 ABCD | Frequency | Read |
| HR 2005 | Positive Watts, 3-Ph, Average | FLOAT32 ABCD | Positive watt demand | Read |
| HR 4500 | Meter Status | BITMAP16 | Meter status (measurement state) | Read |
Enable Modbus control & writes
Reads need no enabling. To change settings: write the password to Open Privileged Command Session (21002), then Initiate Programmable Settings Update (21003), write the settings, use the checksum registers 21004/21005 (writing 21005 saves the settings to non-volatile memory), then write Terminate (21007), which restarts the meter. Reset commands (20000, 20001) take the password directly.
Byte order & addressing
- Holding registers only; the map has no input registers.
- 32-bit values are high word first (ABCD).
- The printed decimal register is one higher than the wire address; the printed hex column is the wire address.
- Per-phase power and power factor read zero unless the hookup is wye.
- Registers not in the map read 0 and accept writes that do nothing.
Network setup
- Set the COM2 address, baud rate and protocol from the front panel or Eaton's configuration software; over Modbus they live in 30026-30027 and can only be written in settings-update mode.
- COM2 baud choices in the map: 9600, 19200, 38400 or 57600.
Watch out for
- Meter Data readings are 0 until the first measurements are ready and while the meter is in settings-update mode (measurement state 'off').
- Reset energy after changing the Power & Energy Format register, as the map advises.
- A THD register reading raw 10000 means THD is unavailable (low signal, delta voltage, or model).
Eaton IQ 250 / IQ 260 Electronic Power Meter Modbus registers
Address = 0-based wire address (the documented number is shown under it when it differs) · Order: ABCD = high word first, CDAB = low word first · Scale: engineering value = raw × scale.
| Table | Address | Name | Description | Type | Order | Scale | Units | Access | Values / bits |
|---|---|---|---|---|---|---|---|---|---|
| HR | 0doc 1 | Meter Name | 16 ASCII characters, two per register, high byte first. | STRING[16] | Read | ||||
| HR | 8doc 9 | Meter Serial Number | 16 ASCII characters. | STRING[16] | Read | ||||
| HR | 16doc 17 | Meter Type | Model code and transducer/submeter flags. | BITMAP16 | Read | bit 8 = Transducer model (1 = yes); bit 9 = Submeter model (1 = yes); bit 0-2 = IQ model code (V40 IQ 250, V41 IQ 260, V48 IQ 250L, V49 IQ 260L) | |||
| HR | 17doc 18 | Firmware Version | 4 ASCII characters. | STRING[4] | Read | ||||
| HR | 19doc 20 | Map Version | UINT16 | Read | |||||
| HR | 20doc 21 | Meter Configuration | CT secondary and calibration frequency. | BITMAP16 | Read | bit 0-5 = Calibration frequency (50 or 60); bit 8-10 = CT denominator (1 or 5) | |||
| HR | 26doc 27 | Meter Type Name | 8 ASCII characters. | STRING[8] | Read | ||||
| HR | 999doc 1000-1001 | Volts A-N | FLOAT32 | ABCD | V | Read | |||
| HR | 1001doc 1002-1003 | Volts B-N | FLOAT32 | ABCD | V | Read | |||
| HR | 1003doc 1004-1005 | Volts C-N | FLOAT32 | ABCD | V | Read | |||
| HR | 1005doc 1006-1007 | Volts A-B | FLOAT32 | ABCD | V | Read | |||
| HR | 1007doc 1008-1009 | Volts B-C | FLOAT32 | ABCD | V | Read | |||
| HR | 1009doc 1010-1011 | Volts C-A | FLOAT32 | ABCD | V | Read | |||
| HR | 1011doc 1012-1013 | Amps A | FLOAT32 | ABCD | A | Read | |||
| HR | 1013doc 1014-1015 | Amps B | FLOAT32 | ABCD | A | Read | |||
| HR | 1015doc 1016-1017 | Amps C | FLOAT32 | ABCD | A | Read | |||
| HR | 1017doc 1018-1019 | Watts, 3-Ph total | FLOAT32 | ABCD | W | Read | |||
| HR | 1019doc 1020-1021 | VARs, 3-Ph total | FLOAT32 | ABCD | var | Read | |||
| HR | 1021doc 1022-1023 | VAs, 3-Ph total | FLOAT32 | ABCD | VA | Read | |||
| HR | 1023doc 1024-1025 | Power Factor, 3-Ph total | Range -1.00 to +1.00. | FLOAT32 | ABCD | Read | |||
| HR | 1025doc 1026-1027 | Frequency | FLOAT32 | ABCD | Hz | Read | |||
| HR | 1027doc 1028-1029 | Neutral Current | FLOAT32 | ABCD | A | Read | |||
| HR | 1029doc 1030-1031 | Watts, Phase A | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | W | Read | ||
| HR | 1031doc 1032-1033 | Watts, Phase B | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | W | Read | ||
| HR | 1033doc 1034-1035 | Watts, Phase C | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | W | Read | ||
| HR | 1035doc 1036-1037 | VARs, Phase A | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | var | Read | ||
| HR | 1037doc 1038-1039 | VARs, Phase B | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | var | Read | ||
| HR | 1039doc 1040-1041 | VARs, Phase C | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | var | Read | ||
| HR | 1041doc 1042-1043 | VAs, Phase A | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | VA | Read | ||
| HR | 1043doc 1044-1045 | VAs, Phase B | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | VA | Read | ||
| HR | 1045doc 1046-1047 | VAs, Phase C | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | VA | Read | ||
| HR | 1047doc 1048-1049 | Power Factor, Phase A | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | Read | |||
| HR | 1049doc 1050-1051 | Power Factor, Phase B | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | Read | |||
| HR | 1051doc 1052-1053 | Power Factor, Phase C | Per-phase value; reads zero unless the hookup is wye. | FLOAT32 | ABCD | Read | |||
| HR | 1053doc 1054-1055 | Symmetrical Component Magnitude, 0 Seq | FLOAT32 | ABCD | V | Read | |||
| HR | 1055doc 1056-1057 | Symmetrical Component Magnitude, + Seq | FLOAT32 | ABCD | V | Read | |||
| HR | 1057doc 1058-1059 | Symmetrical Component Magnitude, - Seq | FLOAT32 | ABCD | V | Read | |||
| HR | 1062doc 1063 | Unbalance, 0 sequence component | UINT16 | × 0.01 | % | Read | |||
| HR | 1063doc 1064 | Unbalance, - sequence component | UINT16 | × 0.01 | % | Read | |||
| HR | 1064doc 1065 | Current Unbalance | UINT16 | × 0.01 | % | Read | |||
| HR | 1999doc 2000-2001 | Amps A, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | A | Read | ||
| HR | 2001doc 2002-2003 | Amps B, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | A | Read | ||
| HR | 2003doc 2004-2005 | Amps C, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | A | Read | ||
| HR | 2005doc 2006-2007 | Positive Watts, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | W | Read | ||
| HR | 2007doc 2008-2009 | Positive VARs, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | var | Read | ||
| HR | 2009doc 2010-2011 | Negative Watts, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | W | Read | ||
| HR | 2011doc 2012-2013 | Negative VARs, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | var | Read | ||
| HR | 2013doc 2014-2015 | VAs, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | VA | Read | ||
| HR | 2015doc 2016-2017 | Positive PF, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | Read | |||
| HR | 2017doc 2018-2019 | Negative PF, 3-Ph, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | Read | |||
| HR | 2019doc 2020-2021 | Neutral Current, Average | Demand average over the programmed interval. | FLOAT32 | ABCD | A | Read | ||
| HR | 4099doc 4100 | Phase A Current angle | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4100doc 4101 | Phase B Current angle | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4101doc 4102 | Phase C Current angle | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4102doc 4103 | Angle, Volts A-B | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4103doc 4104 | Angle, Volts B-C | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4104doc 4105 | Angle, Volts C-A | Range -180.0 to +180.0 degrees. | INT16 | × 0.1 | ° | Read | ||
| HR | 4499doc 4500 | Port ID | COM port the polling master is connected to (1-4). | UINT16 | Read | ||||
| HR | 4500doc 4501 | Meter Status | Measurement, memory, logging and edit state fields. | BITMAP16 | Read | bit 7 = CT/PT compensation enabled; bit 10 = Header NVMEM block OK; bit 11 = Calibration NVMEM block OK; bit 12 = Profile NVMEM block OK; bit 0-2 = Port enabled for edit (0 none, 1-4 COM1-COM4, 7 front panel); bit 3-4 = Edit state (0 startup, 1 normal, 2 privileged session, 3 settings update); bit 5-6 = Flash state (0 initializing, 1 logging disabled by model, 3 logging); bit 13-15 = Measurement state (0 off, 1 running, 2 limp, 3 warmup, 6/7 boot) | |||
| HR | 4501doc 4502 | Limits Status | Out-of-limit flags for the eight programmable limits (1 = out). | BITMAP16 | Read | bit 0-7 = Limits 1-8, below (LM2) setpoint; bit 8-15 = Limits 1-8, above (LM1) setpoint | |||
| HR | 4502doc 4503-4504 | Time Since Reset | Counts in 4 ms steps; wraps after maximum. | UINT32 | ABCD | × 0.004 | s | Read | |
| HR | 4511doc 4512 | Current Day of Week | UINT16 | Read | 1 = Sunday; 2 = Monday; 3 = Tuesday; 4 = Wednesday; 5 = Thursday; 6 = Friday; 7 = Saturday | ||||
| HR | 5999doc 6000 | Volts A-N, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 6000doc 6001 | Volts B-N, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 6001doc 6002 | Volts C-N, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 6002doc 6003 | Amps A, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 6003doc 6004 | Amps B, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 6004doc 6005 | Amps C, %THD | Raw 10000 means THD is not available for this channel. | UINT16 | × 0.01 | % | Read | ||
| HR | 9011doc 9012-9013 | Amps A, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | A | Read | ||
| HR | 9013doc 9014-9015 | Amps B, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | A | Read | ||
| HR | 9015doc 9016-9017 | Amps C, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | A | Read | ||
| HR | 9017doc 9018-9019 | Positive Watts, 3-Ph, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | W | Read | ||
| HR | 9019doc 9020-9021 | Positive VARs, 3-Ph, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | var | Read | ||
| HR | 9021doc 9022-9023 | Negative Watts, 3-Ph, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | W | Read | ||
| HR | 9023doc 9024-9025 | Negative VARs, 3-Ph, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | var | Read | ||
| HR | 9025doc 9026-9027 | VAs, 3-Ph, Maximum Avg Demand | Highest value since the last max/min reset. | FLOAT32 | ABCD | VA | Read | ||
| HR | 9031doc 9032-9033 | Frequency, Maximum | Highest value since the last max/min reset. | FLOAT32 | ABCD | Hz | Read | ||
| HR | 19999doc 20000 | Reset Max/Min Blocks | Write the meter password (5555 when passwords are disabled); always reads 0. | UINT16 | Write | ||||
| HR | 20000doc 20001 | Reset Energy Accumulators | Write the meter password (5555 when passwords are disabled); always reads 0. | UINT16 | Write | ||||
| HR | 21000doc 21001 | Force Meter Restart | Write the password to restart the meter. | UINT16 | Write | ||||
| HR | 21001doc 21002 | Open Privileged Command Session | Write the password; session stays open up to 5 minutes. | UINT16 | Write | ||||
| HR | 21002doc 21003 | Initiate Programmable Settings Update | Write the password inside a privileged session to enter settings-update mode. | UINT16 | Write | ||||
| HR | 21003doc 21004 | Calculate Programmable Settings Checksum | Settings-update mode only; tells the meter to compute the settings checksum. | UINT16 | Write | ||||
| HR | 21004doc 21005 | Programmable Settings Checksum | Settings-update mode only; writing it saves settings to non-volatile memory. | UINT16 | Read/write | ||||
| HR | 21006doc 21007 | Terminate Programmable Settings Update | Write any value to leave settings-update mode (meter resets). | UINT16 | Write | ||||
| HR | 21018doc 21019 | Close Privileged Command Session | Write any value to end the session. | UINT16 | Write | ||||
| HR | 29999doc 30000 | CT multiplier & denominator | CT multiplier and secondary rating. Writable only in settings-update mode. | BITMAP16 | Read/write | bit 0-7 = CT multiplier (1, 10 or 100); bit 8-15 = CT denominator (1 or 5, read-only) | |||
| HR | 30000doc 30001 | CT numerator | Range 1-9999. Writable only in settings-update mode. | UINT16 | Read/write | ||||
| HR | 30001doc 30002 | PT numerator | Range 1-9999. Writable only in settings-update mode. | UINT16 | Read/write | ||||
| HR | 30002doc 30003 | PT denominator | Range 1-9999. Writable only in settings-update mode. | UINT16 | Read/write | ||||
| HR | 30003doc 30004 | PT multiplier & hookup | PT multiplier and wiring hookup. Writable only in settings-update mode. | BITMAP16 | Read/write | bit 0-3 = Hookup (0 3-element wye 9S, 1 delta 2 CTs 5S, 3 2.5-element wye 6S); bit 4-15 = PT multiplier (1, 10, 100 or 1000) | |||
| HR | 30004doc 30005 | Averaging Method | Demand interval and method. Writable only in settings-update mode. | BITMAP16 | Read/write | bit 7 = 0 = block, 1 = rolling; bit 0-2 = Number of subintervals (1-4); bit 8-13 = Interval in minutes (5, 15, 30, 60) | |||
| HR | 30005doc 30006 | Power & Energy Format | Scaling and decimal places for power/energy registers. Writable only in settings-update mode. | BITMAP16 | Read/write | bit 7 = Power decimal point (0 data-dependent, 1 fixed); bit 0-2 = Energy digits after decimal point (0-6); bit 4-6 = Energy scale (0 unit, 3 kilo, 6 mega); bit 8-9 = Number of energy digits (0-3 = 5-8 digits); bit 10-11 = Power digits after decimal point (0-3); bit 12-15 = Power scale (0 unit, 3 kilo, 6 mega, 8 auto) | |||
| HR | 30025doc 30026 | COM2 setup | RS-485 (COM2) protocol, baud rate and reply delay. Writable only in settings-update mode. | BITMAP16 | Read/write | bit 0-2 = Baud rate (1 9600, 2 19200, 4 38400, 6 57600); bit 4-6 = Protocol (1 Modbus RTU, 2 Modbus ASCII, 3 DNP); bit 8-11 = Reply delay in 50 ms steps | |||
| HR | 30026doc 30027 | COM2 address | Modbus address 1-247. Writable only in settings-update mode. | UINT16 | Read/write | ||||
| HR | 40000doc 40001 | System Sanity Indicator | 0 means the meter is operating normally. | UINT16 | Read | 0 = Meter operating properly; 1 = Not operating properly | |||
| HR | 40099doc 40100 | Reset Energy Accumulators (secondary block) | Write the meter password (5555 when passwords are disabled); always reads 0. | UINT16 | Write |
Notes on this map
- Word order: the map's data-format preface says that for 32-bit integers and floats the lower-addressed register holds the high-order half, and its worked float example (C4E1 then 1DB9 = -1800.929) confirms it. All 32-bit values here are ABCD.
- Eaton publishes this map on its Power Xpert Meter 2000 product page under a file name that also mentions the PXM 2000, but the document text itself only names the IQ 250/260. This entry is therefore limited to the IQ 250/260.
- Left out: the integer Readings Block (registers 279-305). Its scale and decimal-point position come from the programmable settings, so a fixed scale cannot be given. Use the float Primary Readings Block instead.
- Left out: every energy counter (Primary Energy Block 1500-1571, Uncompensated energy 3032-3103 and the secondary-block energy 40022-40061). They are signed or unsigned 32-bit integers whose implied decimal point and unit/kilo/mega multiplier depend on the Power & Energy Format register (30006), which the schema cannot express as a fixed scale. Read 30006 and apply its energy scale and decimal digits yourself if you need them.
- Left out: the secondary readings block 40002-40073. These values use offset formulas such as 150 x (raw - 2047) / 2047 that do not fit a simple scale and offset.
- Left out: short-term and minimum/maximum blocks other than the maximum demand values, timestamped min/max blocks, option-card blocks, log setup and log retrieval blocks, TSTAMP registers (three-register date/time) and the limit setpoints.
- Map typo, not used here: in the Short Term Primary Maximum block, Volts C-N Maximum is printed with hex 232F-2320 against decimal 8992-8993; the decimal column implies hex 231F.
- Values marked 'M' in the source range column mean a 1,000,000 multiplier on the range only; the floats themselves are in plain volts, amps, watts, VARs and VAs.
- Command registers always read 0. If a password is wrong the meter still answers normally but does nothing; with passwords disabled the password is 5555.
Check it against the live device. A register map tells you what the controller can expose; the unit in front of you may differ by firmware or options. Read a few registers and compare them with the unit’s own display; for a 32-bit value the float and byte-order decoder shows all four word orders at once, so a wrong word order or scale is obvious. New to this? Read what a register map is and why addresses are off by one.
Questions about the Eaton IQ 250 / IQ 260 Electronic Power Meter
What Modbus registers does the Eaton IQ 250 / IQ 260 Electronic Power Meter have?
This map lists 97 registers: 97 holding registers. 19 of them can be written. Registers vary with firmware, options and configuration, so confirm against the device.
Are the Eaton IQ 250 / IQ 260 Electronic Power Meter Modbus addresses 0-based or 1-based?
The manufacturer's document numbers registers 1-based (subtract 1 for the wire address). Every address on this page is the 0-based wire address you put in the request; the documented number is shown under it where it differs. Each map row prints a hex address and a decimal register. The hex column is the wire address; the decimal column is one higher (the map's own example: serial number at hex 0008 = register 9, entered as 40009 in a SCADA tool). Here 'documented' is the decimal register and address = decimal minus 1.
What byte order does the Eaton IQ 250 / IQ 260 Electronic Power Meter use for 32-bit values?
Multi-register values in this map use ABCD (high word first (big-endian)). Set your client to this order for every 32/64-bit value in the table.
What are the minimum Modbus registers to integrate the Eaton IQ 250 / IQ 260 Electronic Power Meter?
Start with HR 999 Volts A-N (Volts A-N); HR 1011 Amps A (Amps A); HR 1017 Watts, 3-Ph total (Total watts); HR 1023 Power Factor, 3-Ph total (Total power factor); HR 1025 Frequency (Frequency); HR 2005 Positive Watts, 3-Ph, Average (Positive watt demand); HR 4500 Meter Status (Meter status (measurement state)).
How do I enable Modbus control of the Eaton IQ 250 / IQ 260 Electronic Power Meter?
Reads need no enabling. To change settings: write the password to Open Privileged Command Session (21002), then Initiate Programmable Settings Update (21003), write the settings, use the checksum registers 21004/21005 (writing 21005 saves the settings to non-volatile memory), then write Terminate (21007), which restarts the meter. Reset commands (20000, 20001) take the password directly.
Where is the official Eaton IQ 250 / IQ 260 Electronic Power Meter Modbus documentation?
The source is Appendix B: IQ 250/260 Meter, IQ 250/260 Modbus Map (IB02601006E), published free by Eaton at https://www.eaton.com/content/dam/eaton/products/low-voltage-power-distribution-controls-systems/power-energy-meters/power-xpert-meter-2000-series/iq250-260-and-pxm2k-modbus-register-map-ib02601006e.pdf.
More Eaton Modbus register maps
Source: Appendix B: IQ 250/260 Meter, IQ 250/260 Modbus Map · IB02601006E. Register numbers, types, scaling and units are reproduced as published; descriptions are our own.