Presentation

Ethernet Services

The module supports the following services:

oModbus TCP Server

oModbus TCP Client

oWeb Server

oFTP Server

oSNMP

oM241 Logic Controller as Target Device on EtherNet/IP

oM241 Logic Controller as Slave Device on Modbus TCP

oIEC VAR access

Ethernet Protocol

Through the module, the following protocols are supported:

oIP (Internet Protocol)

oUDP (User Datagram Protocol)

oTCP (Transmission Control Protocol)

oARP (Address Resolution Protocol)

oICMP (Internet Control Messaging Protocol)

oIGMP (Internet Group Management Protocol)

TCP Server Connections

This table shows the maximum number of TCP server connections:

Each server based on TCP manages its own set of connections.

When a client tries to open a connection that exceeds the poll size, the controller closes the oldest connection.

If all connections are busy (exchange in progress) when a client tries to open a new one, the new connection is denied.

All server connections stay open as long as the controller stays in operational states (RUN, STOP, HALT).

All server connections are closed when leaving or entering operational states (RUN, STOP, HALT), except in case of power outage (because the controller does not have time to close the connections).

For more information about the operational states, refer to the controller state diagram.

Services Available

With an Ethernet communication, the IEC VAR ACCESS service is supported by the controller. With the IEC VAR ACCESS service, variables can be exchanged between the controller and an HMI.

The NetWork variables service is also supported by the controller. With the NetWork variables service, data can be exchanged between controllers.

NOTE: For more information, refer to the EcoStruxure Machine Expert Programming Guide.