All power meter which supports Modbus RTU protocol can be connected to Iammeter.
1. Previous preparation
Confirm you have prepared:
- A Power Meter which supports Modbus RTU protocol
- DTU device (Serial to TCP)
- If you have no DTU device, you can download the Virtual DTU Software Serial to TCP converter for Iammeter for trial
- Verify that the power meter supports the Modbus protocol, otherwise the meter can not access Iammeter. You can skip this step if you confirmed that it supports.
Taking a Modbus meter as an example, the MODBUS related parameters of this meter are shown as follows referring to its manual.
| Register | Description |
|---|---|
| 0048H （Read-only） | Voltage，Unsigned number，Value=DATA/100, Unit V |
| 0049H （Read-only） | Current，Unsigned number，Value=DATA/100,Unit A |
| 004AH （Read-only） | Active power，Unsigned number，Value=DATA，Unit W |
| 004BH-004CH（Read-only） | Forward active energy，Unsigned number，Value=DATA/3200，Unit kWh |
Connect your power meter to the serial port of your computer by using 485 to serial converter (Ensure the wiring is connect). Send data directly with the serial port to verify the Modbus RTU protocol by using serial software.
Send：：01 03 00 48 00 05 05 DF Receive：01 03 0A 5A 3F 00 4B 00 7C 00 04 22 00 E1 89
Description: Voltage：0x5A3F/100 Current：0x004B /100 Power：0x007C Energy：0x042200/3200
The correct reply proves that the meter supports the Modbus protocol
The register address are different between diffrent power meters. Refer to the manual of your power meter for Modbus description in detail.
2 Registration on Iammeter
Step1, Visit homepage https://www.iammeter.com , click "System" on the top menu,
Step2, Click "Sign up", fill up the information, tick "Sign up by demo sn" so that you can get a free SN for the power meter.
Step3, Configure the parameters of your power meter on Iammeter.
Login to Iammeter, Click "Meters"->"Edit", fill up the Modbus parameters (Slave ID, Registers configuration) correctly.
Step4, Go to "My places" to configure the location & time zone.
Wrong time zone selection will affect the data statistics on daily basis.
3 DTU configuration
3.1 If you have a DTU device
Configure the below information on DTU settings,
TCP Server： pm.modbus.lewei50.com
TCP Port: 9970
Register SN: The SN you get when signing up on Iammeter.
Other DTU Information: Serial parameters, Network parameters (GPRS or WiFi)...
The below picture is only for your referrence, please configure your DTU referring to your DTU manual.
3.2 If you have no DTU device
You can use the software Serial to TCP converter for Iammeter to simulate DTU device
Step1, connect your power meter to PC serial port by using 485 to serial or tcp converter;
Step2, run software Serial to TCP converter for Iammeter on your PC, fill up the register SN
4 Check online data on Iammeter
Login to Iammeter again to check you data,
