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A protocol component communicates with a device or control center using one of the following: a serial link, a modem or a TCP/IP network. The configuration of a communications component is completely independent of the protocol used. Before you connect a device to the SMP Gateway, you have to choose and configure its communications links.

5.5.1

Configuring the Serial Port Interfaces

Depending on the options you choose in the hardware configuration, you can configure the SMP Gateway serial ports to support RS-232, RS-422 or RS-485 communication.

‰ For each port, choose the type of interface to be used. Most substation devices typically use either Asynchronous RS-232 or Asynchronous RS-422/485. If you are using a serial port for a touch screen, select ELO Touchscreen.

Serial port naming conventions

‰ The SMP 16 provides 16 serial ports, identified as A01 through A16. It also has a modem port labeled Modem, which has a “Modem Asynchronous” interface. The SMP 16/SG can also house up to 2 additional serial ports boards, which will be identified as B01 to B16 and D01 to D16.

‰ The SMP 4 and SMP 4-20 both provide 4 built-in serial ports. These ports are identified as

COM1 Board A through COM4 Board A.

The SMP 4 also provides a built-in console serial port. This port is identified as Built-in

Console 1 Board A. This feature allows you to use the Console port as a standard serial port.

If the SMP 4 has an internal modem, then it provides 3 built-in serial ports and 1 built-in modem port. These ports are also identified as COM1 Board A through COM4 Board A; however, the Interface column in the right pane indicates that the interface for COM4 Board

A is “Modem Asynchronous”.

‰ The SMP 8-40 provides 4 additional ports named COM1 Board B through COM4 Board B. The SMP 4-20 and SMP 8-40 SIOM use IPack modules to provide additional ports in groups of 8. The ports in the first group are called IPack_A1 Board A through IPack_A8 Board A. The ports in the second group are called IPack_B1 Board A through IPack_B8 Board A. The SMP 8-40 supports two additional groups of ports called IPack_A1 Board B through

IPack_A8 Board B and IPack_B1 Board B to IPack_B8 Board B.

The purpose of each interface is given in the following table:

Interface Description

Asynchronous RS-232 Use this value to indicate that the serial port is dedicated to establishing a standard asynchronous RS-232 connection.

Asynchronous RS-422/485 Use this value to indicate that the serial port is dedicated to establishing an asynchronous RS-422 or RS-485 connection.

Modem Asynchronous This value indicates that the port is used for modem asynchronous

communication. The value is automatically assigned to the Modem port of an SMP 16 and to the COM4 Board A port of an SMP 4 equipped with an internal modem.

RAS (remote access server) Use this value to indicate that the serial port is configured to accept incoming direct serial connections. This type of connection allows you to use the SMP Tools as if you were connected to the SMP Gateway via a normal network connection. By default, the console port is always configured for RAS.

Refer to the SMP 4 Installation Guide, GUI-00316-00026 T, or to the

SMP 16 Installation Guide, GUI-00316-00032 T, for instructions on

Interface Description

Constraint for the SMP 4-20 and the SMP 8-40:

An SMP 4-20/SMP 8-40 CPU board can support up to 4 different bit rates for the serial ports located on the front panel. This means that if you specify that the console serial port is configured for RAS, only 3 other bit rates will be available for the remaining 4 serial ports on Board A and that if all the other Board A serial ports are used, 2 of the 5 serial ports must have the same bit rate. Note that if you set the console serial port to Reserved and you do, in fact, accept incoming direct serial connections on the console serial port as well as on the 4 remaining serial ports, the SMP Gateway application will disable the console port connection. This constraint obviously does not apply to Board B, since it has 4 serial ports and there are 4 bit rates available.

Redundancy Use this value to indicate that the serial port is reserved for connecting

2 SMP Gateways together as a redundancy group. See “Grouping 2 SMP Gateways for Redundancy”, page 183.

ELO Touchscreen Use this value to indicate that the touch input information of an Elo

touch screen will be transmitted to the SMP Gateway using a serial cable, through this serial port.

Radio Use this value to indicate that a radio will be connected to this serial

port.

Reserved Use this value to indicate that the serial port is reserved for purposes

other than those stated previously.

5.5.2

Configuring the Operation of the Serial Ports

Each serial port needs to be configured with the appropriate settings for the connected device.

‰ In the left pane, open the Connections branch to display all the supported connection types.

‰ Click Asynchronous Serial Ports to display the list of available ports.

Note that if you choose “Redundancy” as the interface for a serial port, this port will not appear in the list of Asynchronous Serial Ports, as it will be reserved for connecting the 2 SMP Gateways that will be grouped together.

‰ In the right pane, enter the settings for the selected serial ports.

The required settings are usually provided in the device manufacturer’s reference manual:

‰ If you are using RS-485 2-wire communication, choose RS-485. If you are using RS-485 4-wire communication, choose RS-422.

‰ Choose the device communications settings: baud rate, byte size, parity and number of stop bits, such as 9600 baud, 8 bits, no parity, and 1 stop bit.

‰ Choose the device hardware handshaking mode:

‰ If the link type is RS-232, most devices do not use handshaking, so you should keep the default values: RTS to Always On, DTR to Always On, and CTS to Ignore.

‰ If the link type is RS-422, set RTS to Always On. You shouldn’t have any problem if you keep the other default values: DTR to Always On, and CTS to Ignore.

‰ If the link type is RS-485, set RTS to TX Request. You shouldn’t have any problem if you keep the other default values: DTR to Always On, and CTS to Ignore.

‰ If you are using RS-422 or RS-485 communication, specify whether or not you will be using line terminators. Refer to your SMP Gateway installation guide for a discussion of termination resistors.

5.5.3

Configuring TCP/IP Master Connections

TCP/IP connections are most often used by slave components to connect to control centers. However, an increasing number of modern IEDs can be connected to a substation LAN using a TCP/IP connection.

To configure a TCP/IP connection for a master protocol component:

‰ In the left pane, click Connections, and then on TCP/IP Masters, to display the list of defined connections.

‰ In the right pane, enter the settings for the new TCP/IP connection in an empty row of the grid:

‰ Provide a significant name for the connection

‰ If you are setting up an SMP 8-40, specify whether you will be using board A or board B to interface with the network.

‰ Enter the IP address of the device.

‰ Enter the TCP port number of the device. This information is provided by the device manufacturer.