Introducing the M580 BMENOS0300 Network Option Switch

Original instructions

Introduction

The BMENOS0300 Ethernet network option switch is a low-cost embedded switching module that simplifies the Ethernet architecture by reducing the use of external switches. You can install the module on a local or a remote BMEXBP•••• Ethernet rack in the Modicon M580 system.

NOTE: If you mount the BMENOS0300 switch on a BMX (X Bus only) backplane, the module will not power up. The module can obtain power only when installed on a BME (Ethernet) rack.

Ruggedized Version

The BMENOS0300C (coated) equipment is the ruggedized version of the BMENOS0300 (standard) equipment. It can be used at standard temperatures and in harsh chemical environments.

For more information, refer to chapter Installation in More Severe Environments.

Altitude Operating Conditions

The characteristics apply to the modules BMENOS0300 and BMENOS0300C for use at altitude up to 2000 m (6560 ft). When the modules operate above 2000 m (6560 ft), apply additional derating.

For detailed information, refer to chapter Operating and Storage Conditions.

Ports

The BMENOS0300 module includes the following 100Base-T (RJ45) network ports:

2 network ports supporting RSTP redundant topologies
1 service port

The module also includes an internal backplane port, which is used to communicate to the embedded Ethernet backplane resident in the rack.

All ports support:

10/100 Mbps data rate
Ethernet II frame type

The two network ports can support the following topologies:

A DIO ring for distributed devices, including Advantys and TeSys T I/O devices
An RIO sub-ring for (e)X80 RIO drops
A non-redundant connection to DIO clouds consisting of distributed equipment

NOTE: Use the IP address of the CPU, and not the address of the BMENOS0300 switch, to communicate with the CPU.

The service port supports:

Mirroring of all other ports, including the network ports, backplane port, and the internal port connecting the embedded switch to the module firmware.
A non-looping daisy-chain of distributed equipment.
General access, for example, by engineering tools performing firmware upgrades.

Configuration

Use the two rotary switches on the front of the BMENOS0300 module to configure the module. The position of these two switches determine the configurable module settings, other than the IP address.

The left rotary switch configures the service port.
The right rotary switch configures the two network ports.

The BMENOS0300 module includes a client, and receives its IP address in one of the following ways:

From a DHCP server resident in the M580 CPU that has been configured to provide the module with its IP address.
If no DHCP server is configured to provide an IP address to the BMENOS0300 module, the module configures itself with an IP address based on its MAC Address.

Ethernet Services

The BMENOS0300 module supports the following Ethernet services:

Web Access HTTP Server
Network Management SNMP agent
Message priority QoS tagging
Diagnostic embedded web pages
DHCP client
FTP

(distributed I/O) Also known as distributed equipment. DRSs use DIO ports to connect distributed equipment.

An Ethernet-based network with a loop attached to the main ring, via a dual-ring switch (DRS) or BMENOS0300 network option switch module on the main ring. This network contains RIO or distributed equipment.

(dynamic host configuration protocol) An extension of the BOOTP communications protocol that provides for the automatic assignment of IP addressing settings, including IP address, subnet mask, gateway IP address, and DNS server names. DHCP does not require the maintenance of a table identifying each network device. The client identifies itself to the DHCP server using either its MAC address, or a uniquely assigned device identifier. The DHCP service utilizes UDP ports 67 and 68.

(central processing unit) The CPU, also known as the processor or controller, is the brain of an industrial manufacturing process. It automates a process as opposed to relay control systems. CPUs are computers suited to survive the harsh conditions of an industrial environment.

(hypertext transfer protocol) A networking protocol for distributed and collaborative information systems. HTTP is the basis of data communication for the web.

(simple network management protocol) Protocol used in network management systems to monitor network-attached devices. The protocol is part of the internet protocol suite (IP) as defined by the internet engineering task force (IETF), which consists of network management guidelines, including an application layer protocol, a database schema, and a set of data objects.

(quality of service) The practice of assigning different priorities to traffic types for the purpose of regulating data flow on the network. In an industrial network, QoS is used to provide a predictable level of network performance.

(file transfer protocol) A protocol that copies a file from one host to another over a TCP/IP-based network, such as the internet. FTP uses a client-server architecture as well as separate control and data connections between the client and server.