MODICON®* Plugin

This plugin enables direct communication with a Schneider Electric Modicon®* programmable logic controller (PLC). For the communication between the plugin and the PLC, the Modbus communication protocol is used.

Once the plugin is configured and a connection between the plugin and the PLC is established, the protocol can be used by both the plugin and the PLC to transmit commands, results, and further information. The configuration of the MODICON®* plugin itself can be adjusted in the MERLIC RTE Setup. However, setting up the connection between MERLIC and the PLC requires the PLC engineering software "EcoStruxure™ Machine Expert - Basic" from Schneider Electric. For more information about the provided MODICON®* plugin, its configuration, set up, and more, see the links below.

Requirements and Limitations

When using the MODICON®* plugin, the following requirements and limitations apply:

• The PLC must be connected to the computer where MERLIC is running via Ethernet.
• Currently, only data results can be transmitted via the MODICON®* plugin. Images cannot be transmitted.
• Only the following MERLIC data types are supported by Schneider Electric Modicon®* PLCs:
  • BOOL
  • INT
  • DINT
  • REAL
  • STRING_80

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* Modicon® is a registered trademark of Schneider Electric USA, Inc.