Modicon M251 Logic Controller

Overview

Software configuration and hardware description can be found in the following manuals:

  • Modicon M251 Logic Controller - Programming Guide

  • Modicon M251 Logic Controller - Hardware Guide

  • EcoStruxure Machine Expert Industrial Ethernet User Guide

The Modicon M251 Logic Controller has various powerful features and can service a wide range of applications.

Software configuration, programming, and commissioning is accomplished with the EcoStruxure Machine Expert software described in the EcoStruxure Machine Expert Programming Guide.

Programming Languages

The M251 Logic Controller is configured and programmed with the EcoStruxure Machine Expert software, which supports the following IEC 61131-3 programming languages:

  • IL: Instruction List

  • ST: Structured Text

  • FBD: Function Block Diagram

  • SFC: Sequential Function Chart

  • LD: Ladder Diagram

EcoStruxure Machine Expert software can also be used to program these controllers using CFC (Continuous Function Chart) language.

Embedded Communication Features

The following types of communication ports are available on the front panel of the controller, depending on the controller reference:

  • CANopen Master

  • Ethernet

  • USB Mini-B

  • Serial Line

M251 Logic Controller Range

This table shows the M251 Logic Controller range and features:

Reference

Digital Inputs

Digital Outputs

Communication Ports

TM251MESC

0

0

1 serial line port

1 USB mini-B programming port

1 dual port Ethernet switch

1 CANopen port

TM251MESE

0

0

1 serial line port

1 USB mini-B programming port

1 dual port Ethernet switch

1 Ethernet port for fieldbus