Siemens COM32 Guia do Utilizador descarregar pdf (Página 17)

ION Setup User Guide Introduction

For instructions on communicating with Ethernet devices, see “Adding and

Configuring Devices” on page 41.

Using Ethernet Gateways or Modbus Gateways

Some Ethernet-capable devices can also serve as communications gateways. An

Ethernet gateway device provides a communications link between its Ethernet port

and its serial port. The gateway device receives TCP data on its Ethernet port,

converts the data to RTU and sends the converted data to its serial port(s) and vice

versa. This allows communication with the serial devices over Ethernet.

For example, a Modbus Ethernet gateway receives Modbus TCP data on its

Ethernet port, converts the data to Modbus RTU and sends the converted data to

devices connected to its serial port(s).

Some devices can function as both metering points and gateways. This type of

communications topology is typically used in applications where you have a high-

end meter monitoring the incoming supply at the service entrance and mid-range

meters monitoring the feeders.

For instructions on communicating with devices using an Ethernet or Modbus

gateway, see “Adding and Configuring Devices” on page 41.

General Ethernet gateway considerations

Before adding an Ethernet gateway to ION Setup, make sure that your gateway

meter is connected to the Ethernet, your serial network of meters are wired to the

gateway meter and basic setup has been performed on each device, including the

gateway meter). Refer to the device documentation for detailed instructions.

Typical parameters that you need to configure are:

 Ethernet gateway device: IP address, subnet mask, the TCP/IP port number

used to communicate with the serial port, and (depending on the gateway

device) the protocol of the serial communications port to which the serial devices

are connected.

 Serial devices: baud rate, unit ID, protocol and parity.

Additional settings may need to be configured — refer to the documentation that

came with your Ethernet gateway device.

LAN / WAN

RS-485

devices

Ethernet

gateway

device

Ethernet

serial RS-485

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