The device has opto-isolated RS485 interface with support of Modbus RTU. It is dedicated to energy meter, voltage meter and any Modbus device like PLC which support Modbus RTU protocol. The device supports multiple Modbus devices with separate address range. It is possible to directly send and receive any value of register from server. Please follow proper connection of A and B signals from device to A and B signals in power meter. If the polarity is reversed there will be no data transmission. All modbus configuration like baud-rate, parity, address available in internal website.
Serial – Configuration of serial communication
In this section are RS485 parameter configuration: baud rate, data bit, parity and stop bit.
| Parameter | Option/range |
|---|---|
| Baudrate | 2400 to 460800 |
| Data bit | 8, 9 |
| Parity | None, Even, Odd |
| Stop bit | 1, 1.5, 2 |
Req. dev. – Request device log
In this section is visible log of modbus devices. In this tab is optional feature to make support for Selec® company meter without necessity to set modbus device details. In window the reply from Selec® device will be visible. Now 2 models of meters are supported MFM383 and EM2M.
Devices – Modbus devices
Modbus devices configuration of modbus devices connected to Gateway. Configuration of: device ID, register, endian, start address, offset address, registers, timeout. It can add multiple devices up to maximum 16.
multiple devices up to maximum 16.
|
Sn |
Parameter |
Details information |
|---|---|---|
|
1 |
Use |
To activate device configuration |
|
2 |
Modbus Device ID |
The ID of modbus device. 01 up to FF. |
|
3 |
Register structure |
8 bit UINT, 16 bit UINT, 32 bit UINT, 8 bit INT, 16 bit INT, 32 bit INT, 32 bit float, 16 bit HEX, 32 bit HEX, Array HEX |
|
4 |
Endian Structure |
ABCD, BADC, CDAB, DCBA |
|
5 |
Start address |
First Modbus register address |
|
6 |
Offset address |
Offset address for add or subtract of actual query address, according to slave device data storage system |
|
7 |
Number of registers |
How many registers needed to query |
|
8 |
Timeout [ms] |
Response time-out for query |
Example for query: 01 04 00 00 00 28 F0 14
In this example F0 14 is checksum CRC-16 big endian.
