This section introduces you to the SEND_REQ function block, which you can configure to send both EtherNet/IP and Modbus TCP explicit messages.

This section describes how to configure the SEND_REQ function block’s Management parameter, which is common to both EtherNet/IP and Modbus/TCP explicit messages.

The following sections of this chapter describe the SEND_REQ function block parameters that are unique to the EtherNet/IP protocol and the Modbus TCP protocol, respectively.