Modicon M251 Plc Page 8 Modicon M251 logic controllers

8 Presentation (continued) Modicon M251 logic controllers Embedded communication Control architecture for modular machines on Ethernet network EtherNet/IP Scanner Modbus TCP I/O Scanner SoMachine protocol Magelis SCU Modicon OTB Lexium 32 Altivar 32 TM221CE ppp TM4ES4 + TM251MESE Ethernet M251 controllers have 2 embedded Ethernet ports connected by an RJ45 switch (10/100 Mbps, MDI/MDIX) with the Modbus TCP, EtherNet/IP, UDP, TCP, SNMP, and SoMachine over Ethernet protocols. These ports are mainly used for communication between machines or with the factory network. These ports are marked Ethernet or Ethernet 1. v M251 controllers each have an embedded Web server and embedded FTP (Client/Server). As well as the default address based on the MAC address, a controller IP address can be assigned via a DHCP server, or via a BOOTP server, SQL Client, and SNMP (Client/Server). v Ethernet ports also offer the same upload/download, update, and debugging functions as the programming port (USB mini-B) when the controller power is on. v A firewall allows the authorized IP addresses for accessing the controller to be iltered and each communication protocol to be locked. v TM251MESE controllers have, in addition to the 2 Ethernet and Ethernet 1 ports, an RJ45 Ethernet 2 optimized Ethernet port for connecting field devices (variable speed drives, distributed I/O, etc.), with EtherNet/IP Scanner, Modbus TCP I/O Scanner, Ethernet Modbus TCP (Client/Server), EtherNet/IP (originator/ adapter), UDP, TCP, SNMP, and SoMachine services. - EtherNet/IP Scanner allows the connection of up to 16 slave devices controlled by the controller in 10 ms (1,024 input words + 1,024 output words). - Modbus TCP I/O Scanner allows the connection of up to 64 slave devices controlled by the controller in 64 ms. For Industrial Ethernet connection cables and accessories, see page 18. 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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