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The “CAA SerialCom” protocol is the serial standard protocol from CODESYS. It allows the implementation of a custom serial protocol.

An example describing how to implement serial communication for ASCII data via RS‑232 or RS‑485 on an AC500 or AC500-eCo PLC is provided as an ‎⮫ application example. . The described implementation is based on the AC500_Com library, which implements the CAA SerialCom library to establish a connection via the COM interfaces.

Default setting

COM_port_nodes

When creating a new project, the protocol “CAA SerialCom” is automatically attached to the “COM_1” port of a PLC.

Switch to default setting

Delete_to_switch

  1. Right-click on the node attached to “COM_1” node in the device tree and click “Delete”.

    The node is switched back to the “CAA SerialCom” protocol.

Parameters

COM1_Parameters

Since “CAA SerialCom” does not represent a real protocol, no specific parameters are required. Part of the common settings are available in the “COM_1” tab after double-click on the “COM_1” node, other common settings are available in the protocol node.

⮫ “Setting up a serial interface”