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Iskra Iskra IE38MD Modbus RTU template

Iskra IE38MD

Three-phase MID energy meter, 80 A direct, with per-phase measurements and 20 energy counters.

The Iskra IE38MD is a three-phase MID energy meter for direct connection up to 80 A that measures energy, power and power quality per phase on a DIN rail. This Modbus RTU template reads voltages, currents, power, power factor, frequency, THD and all energy counters, and lets you set tariff, counters and communication from ModbusCloud.

Protocol
Modbus RTU
Connection
RS485, 115200 baud
Registers
679, read and write
Brand
Iskra
Key readings
Voltage per phase · Current per phase · Active power · Reactive power · Power factor · Frequency · Energy counters · Active tariff
Available commands
Active tariff · Energy counter reset · Communication settings · Energy counter configuration · LCD settings
Compatible models
IE38MD
Last updated

Registers (679)

679 read, 154 write

NameUnitAccessAddress (Hidden until you enter your email)Function (hidden)Type (hidden)
Voltage U1VRead
Voltage U2VRead
Voltage U3VRead
Average Phase VoltageVRead
Voltage U12VRead
Voltage U23VRead
Voltage U31VRead
Average Line VoltageVRead
Current I1ARead
Current I2ARead
Current I3ARead
Total CurrentARead
Neutral Current CalculatedARead
Neutral Current MeasuredARead
Average CurrentARead
Active Power L1WRead
Active Power L2WRead
Active Power L3WRead
Active Power TotalWRead
Reactive Power L1varRead
Reactive Power L2varRead
Reactive Power L3varRead
Reactive Power TotalvarRead
Apparent Power L1VARead
Apparent Power L2VARead
Apparent Power L3VARead
Apparent Power TotalVARead
Power Factor L1Read
Power Factor L2Read
Power Factor L3Read
Power Factor TotalRead
Cap Ind Power Factor L1Read
Cap Ind Power Factor L2Read
Cap Ind Power Factor L3Read
Cap Ind Power Factor TotalRead
Angle U1 I1Read
Angle U2 I2Read
Angle U3 I3Read
Power Angle TotalRead
Angle U1 U2Read
Angle U2 U3Read
Angle U3 U1Read
FrequencyHzRead
THD I1%Read
THD I2%Read
THD I3%Read
Internal TemperatureRead
Run Time FloatsRead
Average Phase Voltage QuickVRead
Average Line Voltage QuickVRead
Total Current QuickARead
Active Power Total QuickWRead
Reactive Power Total QuickvarRead
Apparent Power Total QuickVARead
Power Factor Total QuickRead
Frequency QuickHzRead
Energy Counter n1 FloatRead
Energy Counter n2 FloatRead
Energy Counter n3 FloatRead
Energy Counter n4 FloatRead
Active Tariff FloatRead
Energy Counter n1 Float Energy BlockRead
Energy Counter n2 Float Energy BlockRead
Energy Counter n3 Float Energy BlockRead
Energy Counter n4 Float Energy BlockRead
Energy Counter 1 FloatRead
Energy Counter 2 FloatRead
Energy Counter 3 FloatRead
Energy Counter 4 FloatRead
Energy Counter 5 FloatRead
Energy Counter 6 FloatRead
Energy Counter 7 FloatRead
Energy Counter 8 FloatRead
Energy Counter 9 FloatRead
Energy Counter 10 FloatRead
Energy Counter 11 FloatRead
Energy Counter 12 FloatRead
Energy Counter 13 FloatRead
Energy Counter 14 FloatRead
Energy Counter 15 FloatRead
Energy Counter 16 FloatRead
Nominal Phase VoltageRead
Nominal Phase CurrentRead
Nominal Phase PowerRead
Nominal Total PowerRead
Nominal Total CurrentRead
Nominal FrequencyRead
Status RegisterRead
Phase Valid MeasurementRead
Checksum StatusRead
Current Active TariffRead
Alarm Status Flags G1 G2Read
Alarm Status Flags G3 G4Read
Alarm Status Flags GERead
Logic Functions ValuesRead
IO 1 ValueRead
IO 2 ValueRead
IO 3 ValueRead
IO 4 ValueRead
External Relay StatusRead
MID Lock StatusRead
Internal Temperature T17Read
THD U1 Actual%Read
THD U2 Actual%Read
THD U3 Actual%Read
THD I1 Actual%Read
THD I2 Actual%Read
THD I3 Actual%Read
Angle U1 U2 T17Read
Angle U2 U3 T17Read
Angle U3 U1 T17Read
Angle U2 I2 T17Read
Angle U3 I3 T17Read
Frequency RawRead
Voltage U1 RawRead
Voltage U2 RawRead
Voltage U3 RawRead
Average Phase Voltage RawRead
Voltage U12 RawRead
Voltage U23 RawRead
Voltage U31 RawRead
Average Line Voltage RawRead
Current I1 RawRead
Current I2 RawRead
Current I3 RawRead
Neutral Current Calculated RawRead
Average Current RawRead
Total Current RawRead
Apparent Power Total RawRead
Apparent Power L1 RawRead
Apparent Power L2 RawRead
Apparent Power L3 RawRead
Active Power Total RawRead
Active Power L1 RawRead
Active Power L2 RawRead
Active Power L3 RawRead
Reactive Power Total RawRead
Reactive Power L1 RawRead
Reactive Power L2 RawRead
Reactive Power L3 RawRead
Power Factor Total RawRead
Power Factor L1 RawRead
Power Factor L2 RawRead
Power Factor L3 RawRead
Last Average Interval DurationsRead
Time Since Last AveragesRead
Average Measurements CounterRead
Average TimestampRead
Interval Avg Frequency RawRead
Interval Avg Voltage U1 RawRead
Interval Avg Voltage U2 RawRead
Interval Avg Voltage U3 RawRead
Interval Avg Average Phase Voltage RawRead
Interval Avg Voltage U12 RawRead
Interval Avg Voltage U23 RawRead
Interval Avg Voltage U31 RawRead
Interval Avg Average Line Voltage RawRead
Interval Avg Current I1 RawRead
Interval Avg Current I2 RawRead
Interval Avg Current I3 RawRead
Interval Avg Average Current RawRead
Interval Avg Total Current RawRead
Interval Avg Apparent Power Total RawRead
Interval Avg Apparent Power L1 RawRead
Interval Avg Apparent Power L2 RawRead
Interval Avg Apparent Power L3 RawRead
Interval Avg Active Power Total RawRead
Interval Avg Active Power L1 RawRead
Interval Avg Active Power L2 RawRead
Interval Avg Active Power L3 RawRead
Interval Avg Reactive Power Total RawRead
Interval Avg Reactive Power L1 RawRead
Interval Avg Reactive Power L2 RawRead
Interval Avg Reactive Power L3 RawRead
Interval Avg Power Factor Total RawRead
Interval Avg Power Factor L1 RawRead
Interval Avg Power Factor L2 RawRead
Interval Avg Power Factor L3 RawRead
Interval Avg Angle U1 U2Read
Interval Avg Angle U2 U3Read
Interval Avg Angle U3 U1Read
Interval Avg Angle U1 I1Read
Interval Avg Angle U2 I2Read
Interval Avg Angle U3 I3Read
Interval Avg Power Angle TotalRead
Interval Avg THD U1%Read
Interval Avg THD U2%Read
Interval Avg THD U3%Read
Interval Avg THD I1%Read
Interval Avg THD I2%Read
Interval Avg THD I3%Read
Interval Max Frequency RawRead
Interval Max Voltage U1 RawRead
Interval Max Voltage U2 RawRead
Interval Max Voltage U3 RawRead
Interval Max Average Phase Voltage RawRead
Interval Max Voltage U12 RawRead
Interval Max Voltage U23 RawRead
Interval Max Voltage U31 RawRead
Interval Max Average Line Voltage RawRead
Interval Max Current I1 RawRead
Interval Max Current I2 RawRead
Interval Max Current I3 RawRead
Interval Max Average Current RawRead
Interval Max Total Current RawRead
Interval Max Apparent Power Total RawRead
Interval Max Apparent Power L1 RawRead
Interval Max Apparent Power L2 RawRead
Interval Max Apparent Power L3 RawRead
Interval Max Active Power Total RawRead
Interval Max Active Power L1 RawRead
Interval Max Active Power L2 RawRead
Interval Max Active Power L3 RawRead
Interval Max Reactive Power Total RawRead
Interval Max Reactive Power L1 RawRead
Interval Max Reactive Power L2 RawRead
Interval Max Reactive Power L3 RawRead
Interval Max Power Factor Total RawRead
Interval Max Power Factor L1 RawRead
Interval Max Power Factor L2 RawRead
Interval Max Power Factor L3 RawRead
Interval Max Angle U1 U2Read
Interval Max Angle U2 U3Read
Interval Max Angle U3 U1Read
Interval Max Angle U1 I1Read
Interval Max Angle U2 I2Read
Interval Max Angle U3 I3Read
Interval Max Power Angle TotalRead
Interval Max THD U1%Read
Interval Max THD U2%Read
Interval Max THD U3%Read
Interval Max THD U12%Read
Interval Max THD U23%Read
Interval Max THD U31%Read
Interval Max THD I1%Read
Interval Max THD I2%Read
Interval Max THD I3%Read
Interval Max Internal TemperatureRead
Interval Min Frequency RawRead
Interval Min Voltage U1 RawRead
Interval Min Voltage U2 RawRead
Interval Min Voltage U3 RawRead
Interval Min Average Phase Voltage RawRead
Interval Min Voltage U12 RawRead
Interval Min Voltage U23 RawRead
Interval Min Voltage U31 RawRead
Interval Min Average Line Voltage RawRead
Interval Min Current I1 RawRead
Interval Min Current I2 RawRead
Interval Min Current I3 RawRead
Interval Min Average Current RawRead
Interval Min Total Current RawRead
Interval Min Apparent Power Total RawRead
Interval Min Apparent Power L1 RawRead
Interval Min Apparent Power L2 RawRead
Interval Min Apparent Power L3 RawRead
Interval Min Active Power Total RawRead
Interval Min Active Power L1 RawRead
Interval Min Active Power L2 RawRead
Interval Min Active Power L3 RawRead
Interval Min Reactive Power Total RawRead
Interval Min Reactive Power L1 RawRead
Interval Min Reactive Power L2 RawRead
Interval Min Reactive Power L3 RawRead
Interval Min Power Factor Total RawRead
Interval Min Power Factor L1 RawRead
Interval Min Power Factor L2 RawRead
Interval Min Power Factor L3 RawRead
Interval Min Angle U1 U2Read
Interval Min Angle U2 U3Read
Interval Min Angle U3 U1Read
Interval Min Angle U1 I1Read
Interval Min Angle U2 I2Read
Interval Min Angle U3 I3Read
Interval Min Power Angle TotalRead
Interval Min THD U1%Read
Interval Min THD U2%Read
Interval Min THD U3%Read
Interval Min THD U12%Read
Interval Min THD U23%Read
Interval Min THD U31%Read
Interval Min THD I1%Read
Interval Min THD I2%Read
Interval Min THD I3%Read
Interval Min Internal TemperatureRead
Energy Counter n1Read
Energy Counter n2Read
Energy Counter n3Read
Energy Counter n4Read
Energy Counter 1Read
Energy Counter 2Read
Energy Counter 3Read
Energy Counter 4Read
Energy Counter 5Read
Energy Counter 6Read
Energy Counter 7Read
Energy Counter 8Read
Energy Counter 9Read
Energy Counter 10Read
Energy Counter 11Read
Energy Counter 12Read
Energy Counter 13Read
Energy Counter 14Read
Energy Counter 15Read
Energy Counter 16Read
Energy Counter n1 ExponentRead
Energy Counter n2 ExponentRead
Energy Counter n3 ExponentRead
Energy Counter n4 ExponentRead
Energy Counter 1 ExponentRead
Energy Counter 2 ExponentRead
Energy Counter 3 ExponentRead
Energy Counter 4 ExponentRead
Energy Counter 5 ExponentRead
Energy Counter 6 ExponentRead
Energy Counter 7 ExponentRead
Energy Counter 8 ExponentRead
Energy Counter 9 ExponentRead
Energy Counter 10 ExponentRead
Energy Counter 11 ExponentRead
Energy Counter 12 ExponentRead
Energy Counter 13 ExponentRead
Energy Counter 14 ExponentRead
Energy Counter 15 ExponentRead
Energy Counter 16 ExponentRead
Energy Counter n1 x1000Read
Energy Counter n2 x1000Read
Energy Counter n3 x1000Read
Energy Counter n4 x1000Read
Energy Counter 1 x1000Read
Energy Counter 2 x1000Read
Energy Counter 3 x1000Read
Energy Counter 4 x1000Read
Energy Counter 5 x1000Read
Energy Counter 6 x1000Read
Energy Counter 7 x1000Read
Energy Counter 8 x1000Read
Energy Counter 9 x1000Read
Energy Counter 10 x1000Read
Energy Counter 11 x1000Read
Energy Counter 12 x1000Read
Energy Counter 13 x1000Read
Energy Counter 14 x1000Read
Energy Counter 15 x1000Read
Energy Counter 16 x1000Read
Run TimesRead
Run Time 34999sRead
Logger Measurement ParameterRead
Logger Time IntervalminRead
Logger Valid ResultsRead
Logger Last Result TimeminRead
Logger Value 1Read
Logger Value 2Read
Logger Value 3Read
Logger Value 4Read
Logger Value 5Read
Logger Value 6Read
Logger Value 7Read
Logger Value 8Read
Logger Value 9Read
Logger Value 10Read
Logger Value 11Read
Logger Value 12Read
Logger Value 13Read
Logger Value 14Read
Logger Value 15Read
Logger Value 16Read
Logger Value 17Read
Logger Value 18Read
Logger Value 19Read
Logger Value 20Read
Logger Value 21Read
Logger Value 22Read
Logger Value 23Read
Logger Value 24Read
Logger Value 25Read
Logger Value 26Read
Logger Value 27Read
Logger Value 28Read
Logger Value 29Read
Logger Value 30Read
Logger Value 31Read
Logger Value 32Read
Logger Value 33Read
Logger Value 34Read
Logger Value 35Read
Logger Value 36Read
Logger Value 37Read
Logger Value 38Read
Logger Value 39Read
Logger Value 40Read
Logger Value 41Read
Logger Value 42Read
Logger Value 43Read
Logger Value 44Read
Logger Value 45Read
Logger Value 46Read
Logger Value 47Read
Logger Value 48Read
Logger Value 49Read
Logger Value 50Read
Logger Value 51Read
Logger Value 52Read
Logger Value 53Read
Logger Value 54Read
Logger Value 55Read
Logger Value 56Read
Logger Value 57Read
Logger Value 58Read
Logger Value 59Read
Logger Value 60Read
Logger Value 61Read
Logger Value 62Read
Logger Value 63Read
Logger Value 64Read
Logger Value 65Read
Logger Value 66Read
Logger Value 67Read
Logger Value 68Read
Logger Value 69Read
Logger Value 70Read
Logger Value 71Read
Logger Value 72Read
Logger Value 73Read
Logger Value 74Read
Logger Value 75Read
Logger Value 76Read
Logger Value 77Read
Logger Value 78Read
Logger Value 79Read
Logger Value 80Read
Logger Value 81Read
Logger Value 82Read
Logger Value 83Read
Logger Value 84Read
Logger Value 85Read
Logger Value 86Read
Logger Value 87Read
Logger Value 88Read
Logger Value 89Read
Logger Value 90Read
Logger Value 91Read
Logger Value 92Read
Logger Value 93Read
Logger Value 94Read
Logger Value 95Read
Logger Value 96Read
Logger Value 97Read
Logger Value 98Read
Logger Value 99Read
Logger Value 100Read
Logger Value 101Read
Logger Value 102Read
Logger Value 103Read
Logger Value 104Read
Logger Value 105Read
Logger Value 106Read
Logger Value 107Read
Logger Value 108Read
Logger Value 109Read
Logger Value 110Read
Logger Value 111Read
Logger Value 112Read
Logger Value 113Read
Logger Value 114Read
Logger Value 115Read
Logger Value 116Read
Logger Value 117Read
Logger Value 118Read
Logger Value 119Read
Logger Value 120Read
Logger Value 121Read
Logger Value 122Read
Logger Value 123Read
Logger Value 124Read
Logger Value 125Read
Logger Value 126Read
Logger Value 127Read
Logger Value 128Read
User PasswordRead and write
Factory PasswordRead and write
Level 1 User PasswordRead and write
Level 2 User PasswordRead and write
Active Access LevelRead and write
Manual Password ActivationRead and write
Operator CommandRead and write
Reset Command Register 2Read and write
IR External Relay CommandRead and write
Select Active TariffRead and write
Reset Energy Command 1Read and write
Reset Energy Command 2Read and write
Installation PasswordRead and write
Connection And Total Energy CalculationRead and write
DescriptionRead and write
LocationRead and write
Connection ModeRead and write
CT SecondaryRead and write
CT PrimaryRead and write
VT SecondaryRead and write
VT PrimaryRead and write
Current Input Range%Read and write
Voltage Input Range%Read and write
Nominal Frequency SettingHzRead and write
CT ConnectionRead and write
TimeRead and write
DateRead and write
Automatic Summer Time ChangeRead and write
LCD ConfigurationRead and write
LCD ContrastRead and write
LCD Backlight IntensityRead and write
LCD Backlight Time OffminRead and write
LCD Scroll IntervalsRead and write
LCD Custom Screen 1 Line 1Read and write
LCD Custom Screen 1 Line 2Read and write
LCD Custom Screen 1 Line 3Read and write
LCD Custom Screen 2 Line 1Read and write
LCD Custom Screen 2 Line 2Read and write
LCD Custom Screen 2 Line 3Read and write
LCD Custom Screen 3 Line 1Read and write
LCD Custom Screen 3 Line 2Read and write
LCD Custom Screen 3 Line 3Read and write
LCD Scroll Parameters 1Read and write
LCD Scroll Parameters 2Read and write
LCD Scroll Parameters 3Read and write
LCD Scroll Parameters 4Read and write
LCD Return ModeRead and write
Average IntervalsRead and write
Touch Key ControlRead and write
Port 1 Modbus AddressRead and write
Port 1 Baud RateRead and write
Port 1 Stop BitsRead and write
Port 1 ParityRead and write
Port 1 Data BitsRead and write
Port 1 TCP PortRead and write
Port 1 IP Host NameRead and write
Port 1 IP AddressRead and write
Port 1 Subnet MaskRead and write
Port 1 Default RouterRead and write
WiFi PasswordRead and write
WiFi SSIDRead and write
BluetoothRead and write
Port 2 Modbus AddressRead and write
Port 2 Baud RateRead and write
Port 2 Stop BitsRead and write
Port 2 ParityRead and write
Port 2 Data BitsRead and write
M-Bus Primary AddressRead and write
M-Bus Baud RateRead and write
M-Bus Secondary AddressRead and write
Active Tariff SettingRead and write
Common Energy Counter ExponentRead and write
Total Energy CalculationRead and write
Reactive Power CalculationRead and write
Energy Counter n1 ParameterRead and write
Energy Counter n1 ConfigurationRead and write
Energy Counter n1 Exponent SettingRead and write
Energy Counter n1 Tariff SelectorRead and write
Energy Counter n2 ParameterRead and write
Energy Counter n2 ConfigurationRead and write
Energy Counter n2 Exponent SettingRead and write
Energy Counter n2 Tariff SelectorRead and write
Energy Counter n3 ParameterRead and write
Energy Counter n3 ConfigurationRead and write
Energy Counter n3 Exponent SettingRead and write
Energy Counter n3 Tariff SelectorRead and write
Energy Counter n4 ParameterRead and write
Energy Counter n4 ConfigurationRead and write
Energy Counter n4 Exponent SettingRead and write
Energy Counter n4 Tariff SelectorRead and write
Energy Counter 1 ParameterRead and write
Energy Counter 1 ConfigurationRead and write
Energy Counter 1 Exponent SettingRead and write
Energy Counter 1 Tariff SelectorRead and write
Energy Counter 2 ParameterRead and write
Energy Counter 2 ConfigurationRead and write
Energy Counter 2 Exponent SettingRead and write
Energy Counter 2 Tariff SelectorRead and write
Energy Counter 3 ParameterRead and write
Energy Counter 3 ConfigurationRead and write
Energy Counter 3 Exponent SettingRead and write
Energy Counter 3 Tariff SelectorRead and write
Energy Counter 4 ParameterRead and write
Energy Counter 4 ConfigurationRead and write
Energy Counter 4 Exponent SettingRead and write
Energy Counter 4 Tariff SelectorRead and write
Energy Counter 5 ParameterRead and write
Energy Counter 5 ConfigurationRead and write
Energy Counter 5 Exponent SettingRead and write
Energy Counter 5 Tariff SelectorRead and write
Energy Counter 6 ParameterRead and write
Energy Counter 6 ConfigurationRead and write
Energy Counter 6 Exponent SettingRead and write
Energy Counter 6 Tariff SelectorRead and write
Energy Counter 7 ParameterRead and write
Energy Counter 7 ConfigurationRead and write
Energy Counter 7 Exponent SettingRead and write
Energy Counter 7 Tariff SelectorRead and write
Energy Counter 8 ParameterRead and write
Energy Counter 8 ConfigurationRead and write
Energy Counter 8 Exponent SettingRead and write
Energy Counter 8 Tariff SelectorRead and write
Energy Counter 9 ParameterRead and write
Energy Counter 9 ConfigurationRead and write
Energy Counter 9 Exponent SettingRead and write
Energy Counter 9 Tariff SelectorRead and write
Energy Counter 10 ParameterRead and write
Energy Counter 10 ConfigurationRead and write
Energy Counter 10 Exponent SettingRead and write
Energy Counter 10 Tariff SelectorRead and write
Energy Counter 11 ParameterRead and write
Energy Counter 11 ConfigurationRead and write
Energy Counter 11 Exponent SettingRead and write
Energy Counter 11 Tariff SelectorRead and write
Energy Counter 12 ParameterRead and write
Energy Counter 12 ConfigurationRead and write
Energy Counter 12 Exponent SettingRead and write
Energy Counter 12 Tariff SelectorRead and write
Energy Counter 13 ParameterRead and write
Energy Counter 13 ConfigurationRead and write
Energy Counter 13 Exponent SettingRead and write
Energy Counter 13 Tariff SelectorRead and write
Energy Counter 14 ParameterRead and write
Energy Counter 14 ConfigurationRead and write
Energy Counter 14 Exponent SettingRead and write
Energy Counter 14 Tariff SelectorRead and write
Energy Counter 15 ParameterRead and write
Energy Counter 15 ConfigurationRead and write
Energy Counter 15 Exponent SettingRead and write
Energy Counter 15 Tariff SelectorRead and write
Energy Counter 16 ParameterRead and write
Energy Counter 16 ConfigurationRead and write
Energy Counter 16 Exponent SettingRead and write
Energy Counter 16 Tariff SelectorRead and write
Memory ReferenceRead
Model NumberRead
Serial NumberRead
Software ReferenceRead
Hardware ReferenceRead
Calibration VoltageVRead
Calibration CurrentARead
Accuracy ClassRead
MiNet FlagRead
COM1 Communication TypeRead
Memory TypeRead
IO 1 TypeRead
IO 2 TypeRead
IO 3 TypeRead
IO 4 TypeRead
Ethernet MAC AddressRead
Ethernet Software ReferenceRead
Ethernet IP AddressRead
Phase Module 1 Software ReferenceRead
Phase Module 2 Software ReferenceRead
Phase Module 3 Software ReferenceRead
Phase Module 1 ChecksumRead
Phase Module 2 ChecksumRead
Phase Module 3 ChecksumRead
Phase Module 1 Calibration ChecksumRead
Phase Module 2 Calibration ChecksumRead
Phase Module 3 Calibration ChecksumRead
Measurement Module Software ReferenceRead
Measurement Module ChecksumRead
Measurement Module Calibration ChecksumRead
MID Setting Data ChecksumRead
Setting Data ChecksumRead
Software ChecksumRead
Calibration Time StampRead
MID Unlock CounterRead
FW Upgrade CounterRead
Software Checksum HIRead
Measurement Module Checksum HIRead
Phase Module 1 Checksum HIRead
Phase Module 2 Checksum HIRead
Phase Module 3 Checksum HIRead
Software OptionsRead
Active Communication PortRead
Modbus Max Registers Per ReadRead
Device GroupRead
Actual TimeRead

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Send your device list

If a device is not in the library yet, we build the template for free as soon as we have the register data.

Number of installations (optional)

Use cases

  • Show power and current per phase of a distribution board on a ModbusCloud dashboard.
  • Get an email alert when the current on one phase stays above a threshold or the status register is not 0.
  • Keep 365 days of energy counter history and export it as CSV for tenant or charge point billing.
  • Compare the interval maximum power per week to find peak loads before a grid connection is upgraded.
  • Switch the active tariff from ModbusCloud with a scheduled automation when no tariff input is wired.

Installation

  1. Connect RS485 A and B of the IE38MD to the RS485 port of the ModbusCloud Gateway, use twisted pair cable and terminate both ends of the bus.

  2. Check address and speed on the meter: default 33, 115200 baud, 8 data bits, no parity, 2 stop bits. Give every meter on the bus a unique address.

  3. In ModbusCloud, add a Modbus RTU device with the same settings and import this template.

  4. Check that Voltage U1 and Frequency show plausible values, then load the meter and check the currents and powers.

Things to watch for

The meter does not answer. What should I check?

The IE38MD ships at 115200 baud with 2 stop bits and address 33, which differs from many other meters on a shared bus. Set the device in ModbusCloud to the same values or change the meter, swap A and B if needed and check the termination. Only the IE38MD variant has RS485.

Why are the raw values so large?

The registers ending in Raw use the native Iskra format, where the top byte holds a decimal exponent. Use the float registers without Raw for dashboards and alarms; they give the value directly in volts, amps or watts.

The energy counter shows a different unit than expected.

Each counter adds up the quantity set in its Parameter register (active, reactive or apparent energy, per phase or total) with its own exponent. Read Energy Counter Exponent and the counter Parameter to see what a counter holds before you build a report on it.

What should I watch out for when writing settings?

Settings are protected by access levels; without the right password level the meter refuses the write. Changing the address, speed or parity cuts the connection until ModbusCloud uses the new values. A counter reset cannot be undone, and on a MID meter only resettable counters can be reset.

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